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1. Silver-Doped Calcium Phosphate Bone Cements with Antibacterial Properties

Author: J. V. Rau, M. Fosca, V. Graziani, A. A. Egorov, Yu. V. Zobkov, A. Yu. Fedotov, M. Ortenzi, R. Caminiti, A. E. Baranchikov, and V. S. Komlev
Subjects: bone cement, calcium phosphate, tricalcium phosphate, silver, CaAg(PO3)3, infection, bone graft, Biotechnology, TP248.13-248.65, Medicine (General), R5-920
Abstract: Calcium phosphate bone cements (CPCs) with antibacterial properties are demanded for clinical applications. In this study, we demonstrated the use of a relatively simple processing route based on preparation of silver-doped CPCs (CPCs-Ag) through the preparation of solid dispersed active powder phase. Real-time monitoring of structural transformations and kinetics of several CPCs-Ag formulations (Ag = 0 wt %, 0.6 wt % and 1.0 wt %) was performed by the Energy Dispersive X-ray Diffraction technique. The partial conversion of β-tricalcium phosphate (TCP) phase into the dicalcium phosphate dihydrate (DCPD) took place in all the investigated cement systems. In the pristine cement powders, Ag in its metallic form was found, whereas for CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, CaAg(PO3)3 was detected and Ag (met.) was no longer present. The CPC-Ag 0 wt % cement exhibited a compressive strength of 6.5 ± 1.0 MPa, whereas for the doped cements (CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt %) the reduced values of the compressive strength 4.0 ± 1.0 and 1.5 ± 1.0 MPa, respectively, were detected. Silver-ion release from CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, measured by the Atomic Emission Spectroscopy, corresponds to the average values of 25 µg/L and 43 µg/L, respectively, rising a plateau after 15 days. The results of the antibacterial test proved the inhibitory effect towards pathogenic Escherichia coli for both CPC-Ag 0.6 wt % and CPC-Ag 1.0 wt % cements, better performances being observed for the cement with a higher Ag-content.
Published: 2016
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2. Corrosion mechanisms in copper-based artifacts investigated by secondary ion mass spectrometry

Author: V. Graziani and L. Tortora
Published: 2023
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3. Zinc-releasing calcium phosphate cements for bone substitute materials

Author: Julietta V. Rau, V. Graziani, A. A. Egorov, Vladimir S. Komlev, Marco Fosca, Ruggero Caminiti, M. Ortenzi, Alexander E. Baranchikov, Yu. V. Zobkov, and A. Yu. Fedotov
Subjects: Tricalcium phosphate, Materials science, Scanning electron microscope, chemistry.chemical_element, 02 engineering and technology, Zinc, Calcium, 010402 general chemistry, 01 natural sciences, chemistry.chemical_compound, Materials Chemistry, Cement, Aqueous solution, Process Chemistry and Technology, Metallurgy, technology, industry, and agriculture, 021001 nanoscience & nanotechnology, Bone cement, Microstructure, Phosphate, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Antibacterial property, Calcium phosphate, chemistry, Ceramics and Composites, antibacterial property, bone cement, calcium phosphate, tricalcium phosphate, zinc, 0210 nano-technology, Nuclear chemistry
Abstract: The goal of the present study was to develop zinc-doped calcium phosphate bone cements (CPCs-Zn) for functionalized bone grafts applications. An aqueous co-precipitation process for synthesis of ?-tricalcium phosphate (?-TCP) powder samples with Zn addition ranging from 0. wt% up to 1.2. wt% was proposed as an alternative approach to produce CPCs-Zn, instead of mechanical mixing of powders. Real-time monitoring of structural transformations and kinetics of CPCs-Zn (Zn=0. wt%, 0.6. wt% and 1.2. wt%) was carried out by the Energy Dispersive X-Ray Diffraction technique. The microstructure development in CPCs-Zn was investigated by Scanning Electron Microscopy. Zn-ion release from CPC-Zn 0.6. wt% and CPC-Zn 1.2. wt% cements, measured by the Atomic Emission Spectroscopy, corresponded to the average values of 0.30±0.01 and 0.10±0.01. ?g/L, respectively. The results of antibacterial tests proved the inhibitory effect towards pathogenic . Escherichia coli only for the CPC-Zn 0.6. wt% cement formulation.
Published: 2016
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4. Gold is for the mistress, silver for the maid: Enhanced mechanical properties, osteoinduction and antibacterial activity due to iron doping of tricalcium phosphate bone cements

Author: Marco Fosca, Julietta V. Rau, Vuk Uskoković, Victoria M. Wu, V. Graziani, Alexander S. Fomin, Ruggero Caminiti, Inna V. Fadeeva, Igor A. Presniakov, and Marzo Ortenzi
Subjects: Calcium Phosphates, Materials science, Silver, Biocompatibility, Iron, Population, Osteocalcin, Bioengineering, Core Binding Factor Alpha 1 Subunit, 02 engineering and technology, 010402 general chemistry, Cell morphology, Bone tissue, Spectrum Analysis, Raman, 01 natural sciences, Article, Cell Line, Biomaterials, Mice, Spectroscopy, Mossbauer, X-Ray Diffraction, Osseointegration, medicine, Animals, Humans, Brushite, RNA, Messenger, education, Cement, Bone growth, education.field_of_study, Osteoblasts, Bone Cements, Temperature, 021001 nanoscience & nanotechnology, Bone cement, equipment and supplies, 0104 chemical sciences, Anti-Bacterial Agents, Kinetics, medicine.anatomical_structure, Mechanics of Materials, Gold, Powders, 0210 nano-technology, Nuclear chemistry
Abstract: Self-hardening calcium phosphate cements present ideal bone tissue substitutes from the standpoints of bioactivity and biocompatibility, yet they suffer from (a) weak mechanical properties, (b) negligible bone growth gene effects without the use of exogenous growth factors, and (c) a lack of intrinsic antibacterial activity. Here we attempt to improve on these deficiencies by studying the properties of self-setting Fe-doped bone-integrative cements containing two different concentrations of the dopant: 0.49 and 1.09 wt.% Fe. The hardening process, which involved the transformation of Fe-doped β-tricalcium phosphate (Fe-TCP) to nanocrystalline brushite, was investigated in situ by continuously monitoring the cements using the Energy Dispersive X-Ray diffraction technique. The setting time was 20 minutes and the hardening time 2 h, but it took 50 h for the cement to completely stabilize compositionally and mechanically. Still, compared to other similar systems, the phase transformation during hardening was relatively fast and it also followed a relatively simple reaction path, virtually free of complex intermediates and noisy background. Mössbauer spectrometry demonstrated that (57)Fe atoms in Fe-TCP were located in two non-equivalent crystallographic sites and distributed over positions with a strong crystal distortion. The pronounced presence of ultrafine crystals in the final, brushite phase contributed to the reduction of the porosity and thereby to the enhancement of the mechanical properties. The compressive strength of the hardened TCP cements increased by more than twofold when Fe was added as a dopant, i.e., from 11.5 ± 0.5 to 24.5 ± 2.0 MPa. The amount of iron released from the cements in physiological media steadied after 10 days and was by an order of magnitude lower than the clinical threshold that triggers the toxic response. The cements exhibited osteoinductive activity, as observed from the elevated levels of expression of genes encoding for osteocalcin and Runx2 in both undifferentiated and differentiated MC3T3-E1 cells challenged with the cements. The osteoinductive effect was inversely proportional to the content of Fe ions in the cements, indicating that an excessive amount of iron can have a detrimental effect on the induction of bone growth by osteoblasts in contact with the cement. In contrast, the antibacterial activity of the cement in the agar assay increased against all four bacterial species analysed (E. coli, S. enteritidis, P. aeruginosa, S. aureus) in direct proportion with the concentration of Fe ions in it, indicating their key effect on the promotion of the antibacterial effect in this material. This effect was less pronounced in broth assays. Experiments involving co-incubation of cements with cells in an alternate magnetic radiofrequency field for 30 min demonstrated a good potential for the use of these magnetic cements in hyperthermia cancer therapies. Specifically, the population of the glioblastoma cells decreased six-fold at the 24 h time point following the end of the magnetic field treatment, while the population of the bone cancer cells dropped approximately twofold. The analysis of the MC3T3-E1 cell/cement interaction reiterated the effects of iron in the cement on the bone growth marker expression by showing signs of adverse effects on the cell morphology and proliferation only for the cement containing the higher concentration of Fe ions (1.09 wt.%). Biological testing concluded that the effects of iron are beneficial from the perspective of a magnetic hyperthermia therapy and antibacterial prophylaxis, but its concentration in the material must be carefully optimized to avoid the adverse effects induced above a certain level of iron concentrations.
Published: 2018

5. Metabolic control and complications in Italian people with diabetes treated with continuous subcutaneous insulin infusion

Author: Giuseppe Lepore, Riccardo Bonfanti, Lutgarda Bozzetto, Vincenzo Di Blasi, Angela Girelli, Giorgio Grassi, Dario Iafusco, Luigi Laviola, Ivana Rabbone, Riccardo Schiaffini, Daniela Bruttomesso, F. Mammì, M. Bruzzese, M. Schettino, M.G. Nuzzo, V. Di Blasi, R. Fresa, C. Lambiase, D. Iafusco, A. Zanfardino, S. Confetto, L. Bozzetto, G. Annuzzi, A. Alderisio, G. Riccardi, S. Gentile, G. Marino, G. Guarino, S. Zucchini, G. Maltoni, T. Suprani, V. Graziani, M. Nizzoli, S. Acquati, R. Cavani, S. Romano, M. Michelini, E. Manicardi, R. Bonadonna, A. Dei Cas, E. Dall'aglio, M. Papi, S. Riboni, V. Manicardi, V. Pugni, A. Lasagni, M.E. Street, U. Pagliani, C. Rossi, R. Assaloni, B. Brunato, C. Tortul, G. Zanette, P. Li Volsi, M. Zanatta, L. Tonutti, S. Agus, M.A. Pellegrini, P. Ceccano, G. Pozzilli, Beretta Anguissola, R. Buzzetti, C. Moretti C, G. Leto, P. Pozzilli, S. Manfrini, A.R. Maurizi, S. Leotta, M. Altomare, S. Abbruzzese, S. Carletti, C. Suraci, S. Filetti, M.L. Manca Bitti, S. Arcano, M.G. Cavallo, M. De Bernardinis, D. Pitocco, S. Caputo, A. Rizzi, A. Manto, R. Schiaffini, M. Cappa, D. Benevento, S. Frontoni, I. Malandrucco, S. Morano, T. Filardi, D. Lauro, M.A. Marini, E. Castaldo, D. Sabato, F. Tuccinardi, E. Forte, P. Viterbori, C. Arnaldi, N. Minuto, G. d'Annunzio, A. Corsi, R. Rota, C. Scaranna, R. Trevisan, U. Valentini, A. Girelli, S. Bonfadini, E. Zarra, A. Plebani, E. Prandi, B. Felappi, A. Rocca, E. Meneghini, P. Galli, P. Ruggeri, E. Carrai, L. Fugazza, V. Baggi, D. Conti, E. Bosi, A. Laurenzi, A. Caretto, C. Molinari, E. Orsi, V. Grancini, V. Resi, R. Bonfanti, V. Favalli, C. Bonura, A. Rigamonti, M. Bonomo, F. Bertuzzi, B. Pintaudi, O. Disoteo, G. Perseghin, S. Perra, L. Chiovato, P. De Cata, F. Zerbini, E. Lovati, M. Laneri, L. Guerraggio, A.C. Bossi, V. De Mori, M. Galetta, I. Meloncelli, A. Aiello A, S. Di Vincenzo, A. Nuzzi, E. Fraticelli, E. Ansaldi, M. Battezzati, M. Lombardi, M. Balbo, R. Lera, A. Secco, V. De Donno, F. Cadario, S. Savastio, C. Ponzani, G. Aimaretti, I. Rabbone, G. Ignaccolo, D. Tinti, F. Cerutti, F. Bari, F. Giorgino, E. Piccinno, O. Zecchino, M. Cignarelli, O. Lamacchia, G. Picca, S. De Cosmo, A. Rauseo, L. Tomaselli, A. Tumminia, C. Egiziano, A.M. Scarpitta, F. Maggio, F. Cardella, R. Roppolo, V. Provenzano, M. Fleres, A. Scorsone, A. Scatena, G. Gregori, S. Lucchesi, F. Gadducci, S. Di Cianni, S. Pancani, S. Del Prato, M. Aragona, I. Crisci, A. Calianno, B. Fattor, D. Crazzolara, P. Reinstadler, S. Longhi, G. Incelli, S. Rauch, T. Romanelli, M. Orrasch, V. Cauvin, R. Franceschi, C. Lalli, A. Pianta, A. Marangoni, C.N. Aricò, N. Marin, N. Nogara, N. Simioni, A. Filippi, G.L. Gidoni Guarneri, M.L. Contin M.L, A.P. Decata, L. Bondesan, L. Confortin, A. Coracina, S. Lombardi, S. Costa Padova, E. Cipponeri, R. Scotton, S. Galasso, F. Boscari, M.S. Zanon, C. Vinci, G. Lisato, L. Gottardo, E. Bonora, M. Trombetta, C. Negri, C. Brangani, C. Maffeis, A. Sabbion, M. Marigliano, Lepore, Giuseppe, Bonfanti, Riccardo, Bozzetto, Lutgarda, Di Blasi, Vincenzo, Girelli, Angela, Grassi, Giorgio, Iafusco, Dario, Laviola, Luigi, Rabbone, Ivana, Schiaffini, Riccardo, Bruttomesso, Daniela, Lepore, G., Bonfanti, R., Bozzetto, L., Di Blasi, V., Girelli, A., Grassi, G., Iafusco, D., Laviola, L., Rabbone, I., Schiaffini, R., Bruttomesso, D., Mammi, F., Bruzzese, M., Schettino, M., Nuzzo, M. G., Fresa, R., Lambiase, C., Zanfardino, A., Confetto, S., Annuzzi, G., Alderisio, A., Riccardi, G., Gentile, S., Marino, G., Guarino, G., Zucchini, S., Maltoni, G., Suprani, T., Graziani, V., Nizzoli, M., Acquati, S., Cavani, R., Romano, S., Michelini, M., Manicardi, E., Bonadonna, R., Dei Cas, A., Dall'Aglio, E., Papi, M., Riboni, S., Manicardi, V., Pugni, V., Lasagni, A., Street, M. E., Pagliani, U., Rossi, C., Assaloni, R., Brunato, B., Tortul, C., Zanette, G., Li Volsi, P., Zanatta, M., Tonutti, L., Agus, S., Pellegrini, M. A., Ceccano, P., Pozzilli, G., Anguissola, B., Buzzetti, R., Moretti C, C., Leto, G., Pozzilli, P., Manfrini, S., Maurizi, A. R., Leotta, S., Altomare, M., Abbruzzese, S., Carletti, S., Suraci, C., Filetti, S., Manca Bitti, M. L., Arcano, S., Cavallo, M. G., De Bernardinis, M., Pitocco, D., Caputo, S., Rizzi, A., Manto, A., Cappa, M., Benevento, D., Frontoni, S., Malandrucco, I., Morano, S., Filardi, T., Lauro, D., Marini, M. A., Castaldo, E., Sabato, D., Tuccinardi, F., Forte, E., Viterbori, P., Arnaldi, C., Minuto, N., D'Annunzio, G., Corsi, A., Rota, R., Scaranna, C., Trevisan, R., Valentini, U., Bonfadini, S., Zarra, E., Plebani, A., Prandi, E., Felappi, B., Rocca, A., Meneghini, E., Galli, P., Ruggeri, P., Carrai, E., Fugazza, L., Baggi, V., Conti, D., Bosi, E., Laurenzi, A., Caretto, A., Molinari, C., Orsi, E., Grancini, V., Resi, V., Favalli, V., Bonura, C., Rigamonti, A., Bonomo, M., Bertuzzi, F., Pintaudi, B., Disoteo, O., Perseghin, G., Perra, S., Chiovato, L., De Cata, P., Zerbini, F., Lovati, E., Laneri, M., Guerraggio, L., Bossi, A. C., De Mori, V., Galetta, M., Meloncelli, I., Aiello A, A., Di Vincenzo, S., Nuzzi, A., Fraticelli, E., Ansaldi, E., Battezzati, M., Lombardi, M., Balbo, M., Lera, R., Secco, A., De Donno, V., Cadario, F., Savastio, S., Ponzani, C., Aimaretti, G., Ignaccolo, G., Tinti, D., Cerutti, F., Bari, F., Giorgino, F., Piccinno, E., Zecchino, O., Cignarelli, M., Lamacchia, O., Picca, G., De Cosmo, S., Rauseo, A., Tomaselli, L., Tumminia, A., Egiziano, C., Scarpitta, A. M., Maggio, F., Cardella, F., Roppolo, R., Provenzano, V., Fleres, M., Scorsone, A., Scatena, A., Gregori, G., Lucchesi, S., Gadducci, F., Di Cianni, S., Pancani, S., Del Prato, S., Aragona, M., Crisci, I., Calianno, A., Fattor, B., Crazzolara, D., Reinstadler, P., Longhi, S., Incelli, G., Rauch, S., Romanelli, T., Orrasch, M., Cauvin, V., Franceschi, R., Lalli, C., Pianta, A., Marangoni, A., Arico, C. N., Marin, N., Nogara, N., Simioni, N., Filippi, A., Gidoni Guarneri, G. L., Contin, M. L M. L., Decata, A. P., Bondesan, L., Confortin, L., Coracina, A., Lombardi, S., Costa Padova, S., Cipponeri, E., Scotton, R., Galasso, S., Boscari, F., Zanon, M. S., Vinci, C., Lisato, G., Gottardo, L., Bonora, E., Trombetta, M., Negri, C., Brangani, C., Maffeis, C., Sabbion, A., Marigliano, M., Lepore, G, Bonfanti, R, Bozzetto, L, Di Blasi, V, Girelli, A, Grassi, G, Iafusco, D, Laviola, L, Rabbone, I, Schiaffini, R, Bruttomesso, D, Mammi, F, Bruzzese, M, Schettino, M, Nuzzo, M, Fresa, R, Lambiase, C, Zanfardino, A, Confetto, S, Annuzzi, G, Alderisio, A, Riccardi, G, Gentile, S, Marino, G, Guarino, G, Zucchini, S, Maltoni, G, Suprani, T, Graziani, V, Nizzoli, M, Acquati, S, Cavani, R, Romano, S, Michelini, M, Manicardi, E, Bonadonna, R, Dei Cas, A, Dall'Aglio, E, Papi, M, Riboni, S, Manicardi, V, Pugni, V, Lasagni, A, Street, M, Pagliani, U, Rossi, C, Assaloni, R, Brunato, B, Tortul, C, Zanette, G, Li Volsi, P, Zanatta, M, Tonutti, L, Agus, S, Pellegrini, M, Ceccano, P, Pozzilli, G, Anguissola, B, Buzzetti, R, Moretti C, C, Leto, G, Pozzilli, P, Manfrini, S, Maurizi, A, Leotta, S, Altomare, M, Abbruzzese, S, Carletti, S, Suraci, C, Filetti, S, Manca Bitti, M, Arcano, S, Cavallo, M, De Bernardinis, M, Pitocco, D, Caputo, S, Rizzi, A, Manto, A, Cappa, M, Benevento, D, Frontoni, S, Malandrucco, I, Morano, S, Filardi, T, Lauro, D, Marini, M, Castaldo, E, Sabato, D, Tuccinardi, F, Forte, E, Viterbori, P, Arnaldi, C, Minuto, N, D'Annunzio, G, Corsi, A, Rota, R, Scaranna, C, Trevisan, R, Valentini, U, Bonfadini, S, Zarra, E, Plebani, A, Prandi, E, Felappi, B, Rocca, A, Meneghini, E, Galli, P, Ruggeri, P, Carrai, E, Fugazza, L, Baggi, V, Conti, D, Bosi, E, Laurenzi, A, Caretto, A, Molinari, C, Orsi, E, Grancini, V, Resi, V, Favalli, V, Bonura, C, Rigamonti, A, Bonomo, M, Bertuzzi, F, Pintaudi, B, Disoteo, O, Perseghin, G, Perra, S, Chiovato, L, De Cata, P, Zerbini, F, Lovati, E, Laneri, M, Guerraggio, L, Bossi, A, De Mori, V, Galetta, M, Meloncelli, I, Aiello A, A, Di Vincenzo, S, Nuzzi, A, Fraticelli, E, Ansaldi, E, Battezzati, M, Lombardi, M, Balbo, M, Lera, R, Secco, A, De Donno, V, Cadario, F, Savastio, S, Ponzani, C, Aimaretti, G, Ignaccolo, G, Tinti, D, Cerutti, F, Bari, F, Giorgino, F, Piccinno, E, Zecchino, O, Cignarelli, M, Lamacchia, O, Picca, G, De Cosmo, S, Rauseo, A, Tomaselli, L, Tumminia, A, Egiziano, C, Scarpitta, A, Maggio, F, Cardella, F, Roppolo, R, Provenzano, V, Fleres, M, Scorsone, A, Scatena, A, Gregori, G, Lucchesi, S, Gadducci, F, Di Cianni, S, Pancani, S, Del Prato, S, Aragona, M, Crisci, I, Calianno, A, Fattor, B, Crazzolara, D, Reinstadler, P, Longhi, S, Incelli, G, Rauch, S, Romanelli, T, Orrasch, M, Cauvin, V, Franceschi, R, Lalli, C, Pianta, A, Marangoni, A, Arico, C, Marin, N, Nogara, N, Simioni, N, Filippi, A, Gidoni Guarneri, G, Contin, M, Decata, A, Bondesan, L, Confortin, L, Coracina, A, Lombardi, S, Costa Padova, S, Cipponeri, E, Scotton, R, Galasso, S, Boscari, F, Zanon, M, Vinci, C, Lisato, G, Gottardo, L, Bonora, E, Trombetta, M, Negri, C, Brangani, C, Maffeis, C, Sabbion, A, and Marigliano, M
Subjects: Blood Glucose, Male, Pediatrics, Acute and chronic complication, Glycated Hemoglobin A, Time Factors, Endocrinology, Diabetes and Metabolism, medicine.medical_treatment, Medicine (miscellaneous), Ketosi, Infusions, Subcutaneous, Settore MED/13 - Endocrinologia, Acute and chronic complications, Continuous subcutaneous insulin infusion (CSII), Diabetes mellitus, Metabolic control, Nutrition and Dietetics, Cardiology and Cardiovascular Medicine, 0302 clinical medicine, Endocrinology, Adolescent, Adult, Albuminuria, Biomarkers, Child, Cross-Sectional Studies, Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Diabetic Nephropathies, Diabetic Retinopathy, Female, Health Care Surveys, Humans, Hypertension, Hypoglycemia, Hypoglycemic Agents, Insulin, Italy, Ketosis, Middle Aged, Risk Factors, Treatment Outcome, Young Adult, Insulin Infusion Systems, 030212 general & internal medicine, Subcutaneous, Diabetic retinopathy, Diabetes and Metabolism, medicine.symptom, Type 2, Human, Type 1, Insulin pump, Infusions, medicine.medical_specialty, Diabetes mellitu, Time Factor, 030209 endocrinology & metabolism, 03 medical and health sciences, medicine, Cross-Sectional Studie, Glycated Hemoglobin, Type 1 diabetes, Hypoglycemic Agent, business.industry, Risk Factor, Biomarker, medicine.disease, Ketoacidosis, Infusions, Subcutaneou, Health Care Survey, Diabetic Nephropathie, business
Abstract: Background and aim: The objective of this cross-sectional study was to evaluate the degree of glycaemic control and the frequency of diabetic complications in Italian people with diabetes who were treated with continuous subcutaneous insulin infusion (CSII). Methods and results: Questionnaires investigating the organisation of diabetes care centres, individuals’ clinical and metabolic features and pump technology and its management were sent to adult and paediatric diabetes centres that use CSII for treatment in Italy. Information on standard clinical variables, demographic data and acute and chronic diabetic complications was derived from local clinical management systems. The sample consisted of 6623 people with diabetes, which was obtained from 93 centres. Of them, 98.8% had type 1 diabetes mellitus, 57.2% were female, 64% used a conventional insulin pump and 36% used a sensor-augmented insulin pump. The median glycated haemoglobin (HbA1c) level was 60 mmol/mol (7.6%). The HbA1c target (i.e. 18 years) was achieved in 43.4% of paediatric and 23% of adult participants. Factors such as advanced pump functions, higher rate of sensor use, pregnancy in the year before the study and longer duration of diabetes were associated with lower HbA1c levels. The most common chronic complications occurring in diabetes were retinopathy, microalbuminuria and hypertension. In the year before the study, 5% of participants reported ≥1 episode of severe hypoglycaemic (SH) episodes (SH) and 2.6% reported ≥1 episode of ketoacidosis. Conclusions: Advanced personal skills and use of sensor-based pump are associated with better metabolic control outcomes in Italian people with diabetes who were treated with CSII. The reduction in SH episodes confirms the positive effect of CSII on hypoglycaemia. Clinical trial registration number: NCT 02620917 (ClinicalTrials.gov).
Published: 2018

6. Raman Spectroscopy Applied to Parathyroid Tissues: A New Diagnostic Tool to Discriminate Normal Tissue from Adenoma

Author: Isabella Giovannoni, Maria Carla Santarsia, M. Rocchia, Marco Fosca, Anna Crescenzi, Filippo Longo, Chiara Taffon, Roberto Cesareo, Federico Marini, Silvia Manfrini, Julietta V. Rau, V. Graziani, Pierfilippo Crucitti, Paolo Pozzilli, Andrea Palermo, Angelo Lauria, and Gaia Tabacco
Subjects: Parathyroidectomy, Raman Spectroscopy, medicine.medical_specialty, Adenoma, medicine.medical_treatment, Parathyroid hormone, parathyroid hormones, Spectrum Analysis, Raman, 01 natural sciences, Analytical Chemistry, hyperparathyroidism, Parathyroid Glands, 03 medical and health sciences, symbols.namesake, 0302 clinical medicine, medicine, Humans, endocrine disorders, calibration and validation, minimally invasive surgery, partial least squares discriminant analysis (PLSDA), pathological conditions, spectroscopic features, Diagnostic Tool to Discriminate Normal Tissue from Adenoma, Least-Squares Analysis, diagnostics, Parathyroid adenoma, Oxyphil cell (parathyroid), Chemistry, 010401 analytical chemistry, human tissues, Discriminant Analysis, Optical Biopsy, medicine.disease, 0104 chemical sciences, Parathyroid Neoplasms, 030220 oncology & carcinogenesis, symbols, adenoma, Radiology, Raman spectroscopy, parathyroid tissues, Primary hyperparathyroidism
Abstract: Primary hyperparathyroidism is an endocrine disorder characterized by autonomous production of parathyroid hormone. Patients with the symptomatic disease should be referred for parathyroidectomy. However, the distinction between the pathological condition and the benign one is very challenging in the surgical setting; therefore, accurate recognition is important to ensure success during minimally invasive surgery. At present, all intraoperative techniques significantly increase surgical time and, consequently, cost. In this proof-of-concept study, Raman microscopy was used to differentiate between healthy parathyroid tissue and parathyroid adenoma from 18 patients. The data showed different spectroscopic features for the two main tissue types of healthy and adenoma. Moreover, the parathyroid adenoma subtypes (chief cells and oxyphil cells) were characterized by their own Raman spectra. The partial least-squares discriminant analysis (PLS-DA) model built to discriminate healthy from adenomatous parathyroid tissue was able to correctly classify all samples in the calibration and validation data sets, providing 100% prediction accuracy. The PLS-DA model built to discriminate chief cell adenoma from oxyphil cell adenoma allowed us to correctly classify >99% of the spectra during calibration and cross-validation and to correctly predict 100% of oxyphil and 99.8% of chief cells in the external validation data set. The results clearly demonstrate the great potential of Raman spectroscopy. The final goal would be development of a Raman portable fiber probe device for intraoperative optical biopsy, both to improve the surgical success rate and reduce surgical cost.
Published: 2017
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7. Proof-of-concept Raman spectroscopy study aimed to differentiate thyroid follicular patterned lesions

Author: Marco Fosca, Chiara Taffon, Marco Caricato, V. Graziani, M. Rocchia, Andrea Onetti Muda, Julietta V. Rau, Paolo Pozzilli, and Anna Crescenzi
Subjects: Thyroid nodules, Adenoma, Pathology, medicine.medical_specialty, endocrine system, Thyroid Gland, lcsh:Medicine, Spectrum Analysis, Raman, 01 natural sciences, Article, 03 medical and health sciences, 0302 clinical medicine, Follicular phase, Parenchyma, Adenocarcinoma, Follicular, Carcinoma, medicine, Frozen Sections, Humans, Prospective Studies, Thyroid Neoplasms, Thyroid Nodule, lcsh:Science, Frozen section procedure, Microscopy, Multidisciplinary, business.industry, 010401 analytical chemistry, Thyroid, lcsh:R, Cancer, medicine.disease, Carcinoma, Papillary, 0104 chemical sciences, medicine.anatomical_structure, 030220 oncology & carcinogenesis, lcsh:Q, business
Abstract: Inter-observer variability and cancer over-diagnosis are emerging clinical problems, especially for follicular patterned thyroid lesions. This challenge strongly calls for a new clinical tool to reliably identify neoplastic lesions and to improve the efficiency of differentiation between benign and malignant neoplasms, especially considering the increased diagnosis of small carcinomas and the growing number of thyroid nodules. In this study, we employed a Raman spectroscopy (RS) microscope to investigate frozen thyroid tissues from fourteen patients with thyroid nodules. To generate tissue classification models, a supervised statistical analysis of the Raman spectra was performed. The results obtained demonstrate an accuracy of 78% for RS based diagnosis to discriminate between normal parenchyma and follicular patterned thyroid nodules, and 89% accuracy – for very challenging follicular lesions (carcinoma versus adenoma). RS translation into intraoperative diagnosis of frozen sections and in preoperative analysis of biopsies can be very helpful to reduce unnecessary surgery in patients with indeterminate cytological reports.
Published: 2017

8. The Bone Building Blues: Self-hardening copper-doped calcium phosphate cement and its in vitro assessment against mammalian cells and bacteria

Author: Marco Fosca, Inna V. Fadeeva, Victoria M. Wu, Alexander S. Fomin, Vuk Uskoković, V. Graziani, and Julietta V. Rau
Subjects: Calcium Phosphates, Materials science, Inorganic chemistry, Kinetics, chemistry.chemical_element, Bioengineering, 02 engineering and technology, Calcium, engineering.material, 010402 general chemistry, 01 natural sciences, Copper-doped calcium phosphate cement, Article, Apatite, Biomaterials, Mice, Copper doped calcium phosphate cement, Eukaryotic cells, X-Ray Diffraction, Calcium ion substitution, Escherichia coli, Animals, Humans, Brushite, In vitro properties, Cement, Bacteria, Bone Cements, 021001 nanoscience & nanotechnology, Hardening behavior, Copper, Solidification kinetics, 0104 chemical sciences, chemistry, Mechanics of Materials, visual_art, Copper doped calcium phosphate cement, Brushite, Hardening behavior, Solidification kinetics, Calcium ion substitution, In vitro properties, Eukaryotic cells, Bacteria, Whitlockite, engineering, visual_art.visual_art_medium, Hardening behaviour, 0210 nano-technology, Antibacterial activity, Nuclear chemistry
Abstract: A blue calcium phosphate cement with optimal self-hardening properties was synthesized by doping whitlockite (β-TCP) with copper ions. The mechanism and the kinetics of the cement solidification process were studied using energy dispersive X-ray diffraction and it was found out that hardening was accompanied by the phase transition from TCP to brushite. Reduced lattice parameters in all crystallographic directions resulting from the rather low (1:180) substitution rate of copper for calcium was consistent with the higher ionic radius of the latter. The lower cationic hydration resulting from the partial Ca → Cu substitution facilitated the release of constitutive hydroxyls and lowered the energy of formation of TCP from the apatite precursor at elevated temperatures. Addition of copper thus effectively inhibited the formation of apatite as the secondary phase. The copper-doped cement exhibited an antibacterial effect, though exclusively against Gram-negative bacteria, including E. coli, P. aeruginosa and S. enteritidis. This antibacterial effect was due to copper ions, as demonstrated by an almost negligible antibacterial effect of the pure, copper-free cement. Also, the antibacterial activity of the copper-containing cement was significantly higher than that of its precursor powder. Since there was no significant difference between the kinetics of the release of copper from the precursor TCP powder and from the final, brushite phase of the hardened cement, this has suggested that the antibacterial effect was not solely due to copper ions, but due to the synergy between cationic copper and a particular phase and aggregation state of calcium phosphate. Though inhibitory to bacteria, the copper-doped cement increased the viability of human glial E297 cells, murine osteoblastic K7M2 cells and especially human primary lung fibroblasts. That this effect was also due to copper ions was evidenced by the null effect on viability increase exhibited by the copper-free cements. The difference in the mechanism of protection of dehydratases in prokaryotes and eukaryotes was used as a rationale for explaining the hereby evidenced selectivity in biological response. It presents the basis for the consideration of copper as a dually effective ion when synergized with calcium phosphates: toxic for bacteria and beneficial for the healthy cells.
Published: 2017
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9. RAMAN spectroscopy imaging improves the diagnosis of papillary thyroid carcinoma

Author: Paolo Pozzilli, Anna Crescenzi, Pierfilippo Crucitti, Chiara Taffon, Marco Fosca, V. Graziani, Andrea Onetti Muda, Julietta V. Rau, M. Rocchia, and Marco Caricato
Subjects: 0301 basic medicine, Thyroid nodules, Pathology, medicine.medical_specialty, endocrine system diseases, fingerprint, 02 engineering and technology, Biostatistics, Spectrum Analysis, Raman, Article, Thyroid carcinoma, 03 medical and health sciences, symbols.namesake, Carcinoma, diagnostics, Image Processing, Computer-Assisted, Medicine, cancer, Humans, tissues, Thyroid Neoplasms, Thyroid cancer, Microscopy, Multidisciplinary, business.industry, Thyroid, Cancer, imaging, Diagnostic markers, 021001 nanoscience & nanotechnology, medicine.disease, Raman spectroscopy, imaging, diagnostics, cancer, tissues, fingerprint, Carcinoma, Papillary, 030104 developmental biology, medicine.anatomical_structure, Thyroid Cancer, Papillary, Raman spectroscopy, symbols, Cancer imaging, Differential diagnosis, 0210 nano-technology, business
Abstract: Recent investigations strongly suggest that Raman spectroscopy (RS) can be used as a clinical tool in cancer diagnosis to improve diagnostic accuracy. In this study, we evaluated the efficiency of Raman imaging microscopy to discriminate between healthy and neoplastic thyroid tissue, by analyzing main variants of Papillary Thyroid Carcinoma (PTC), the most common type of thyroid cancer. We performed Raman imaging of large tissue areas (from 100 × 100 μm2 up to 1 × 1 mm2), collecting 38 maps containing about 9000 Raman spectra. Multivariate statistical methods, including Linear Discriminant Analysis (LDA), were applied to translate Raman spectra differences between healthy and PTC tissues into diagnostically useful information for a reliable tissue classification. Our study is the first demonstration of specific biochemical features of the PTC profile, characterized by significant presence of carotenoids with respect to the healthy tissue. Moreover, this is the first evidence of Raman spectra differentiation between classical and follicular variant of PTC, discriminated by LDA with high efficiency. The combined histological and Raman microscopy analyses allow clear-cut integration of morphological and biochemical observations, with dramatic improvement of efficiency and reliability in the differential diagnosis of neoplastic thyroid nodules, paving the way to integrative findings for tumorigenesis and novel therapeutic strategies.
Published: 2016
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10. Newly recognized bacteria involved in trunk scab and canker of white and hybrid poplars

Author: A. Fabi, N. Anselmi, L. Varvaro, and V. Graziani
Subjects: Canker, Ecology, biology, Spots, Inoculation, fungi, food and beverages, Forestry, Erwinia, biology.organism_classification, medicine.disease, White (mutation), Botany, medicine, Bacteria, Pseudomonas mendocina, Hybrid
Abstract: Summary In a 4-year-old collection of native Italian Populus alba, growing in the eastern Po valley, many trunks showed severe symptoms characterized by brown spots, similar to trunk scab and/or by cankers. Canker-like growths, often with gall-like-formations in the earlier developmental phases were also found on some clones of P. trichocarpa and their hybrids, as well as on P. deltoides growing in several Northern Italian nurseries. Bacteria and fungi present in the affected tissues and potentially involved in the disease were examined. No fungi were detected, however, several species of bacteria were isolated and identified: Pseudomonas mendocina and Erwinia herbicola group, from the brown spots; Erwinia carotovora sub sp. carotovora and, occasionally, E. herbicola group, from cankers. Only E. carotovora sub sp. carotovora produced clear symptoms of canker when artificially inoculated on young plants of different poplar species. This is the first time this symptomology on poplar species has been clearly related to E. carotovora sub sp. carotovora.
Published: 2008
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11. Occupational therapy for advanced HIV patients at a home care facility: a pilot study

Author: C D'eramo, G. D'amico, Vania Re, Lamberto Manzoli, Giustino Parruti, A Giansante, and R V Graziani
Subjects: Adult, Male, Occupational therapy, medicine.medical_specialty, Coping (psychology), Health (social science), Social Psychology, Global Assessment of Functioning, Socio-culturale, HIV Infections, Pilot Projects, Occupational Therapy, Acquired immunodeficiency syndrome (AIDS), Rating scale, Antiretroviral Therapy, Highly Active, Sickness Impact Profile, medicine, Humans, Psychiatry, Social stress, Depressive Disorder, business.industry, Public Health, Environmental and Occupational Health, Social environment, medicine.disease, Home Care Services, Mental health, Social Isolation, Socioeconomic Factors, HIV-1, Quality of Life, Physical therapy, Female, business, Stress, Psychological
Abstract: Occupational therapy holds promise to increase quality of life and social functioning in patients with HIV infection. Since 2000 through 2005, we experimented a complex structured intervention including directly administered HAART, psychiatric support and occupational therapy for 14 patients with advanced HIV infection and multiple disabilities, cared for at an Italian home care facility. Social and occupational abilities were evaluated using the Axis V of DMS-IV, as assessed by the Global Assessment of Functioning Scale. Patients' abilities in coping with stressful situations were examined using the Social Dysfunction Rating Scale. Both outcomes were evaluated in interviews at study entrance and yearly thereafter. As compared to baseline, social function mean score significantly increased by 42% after one year of follow-up, and social stress mean score was significantly reduced by 11%. Both outcomes continued to improve constantly during the entire follow-up. Acceptance of the intervention was high, and three patients got outdoor job positions. The findings from this pilot study suggest that occupational therapy could be integrated with success in the treatment of severely disabled patients with advanced HIV infection. Confirmation from further research is required.
Published: 2007
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12. Walking index for spinal cord injury (WISCI): an international multicenter validity and reliability study

Author: Marco Marchetti, R Marshall, V. Graziani, Patricia W. Nance, P Ditunno, Giorgio Scivoletto, V. Castellano, Hugues Barbeau, H. L. Frankel, Jr F. Ditunno, J. M. D'Andrea Greve, M. Bernardi, and Hyun-Yoon Ko
Subjects: Canada, Orthotic Devices, medicine.medical_specialty, disability evaluation, Consensus Development Conferences as Topic, Concordance, Concurrent validity, Validity, Pilot Projects, Walking, walking scale, Statistics, Nonparametric, medicine, Humans, Spinal Cord Injuries, Reliability (statistics), Rank correlation, paraplegic classification, Observer Variation, Korea, Trauma Severity Indices, business.industry, Australia, Reproducibility of Results, Videotape Recording, spinal cord injury, General Medicine, Functional Independence Measure, United Kingdom, United States, Italy, Neurology, Ranking, Scale (social sciences), Physical therapy, Neurology (clinical), business, Brazil
Abstract: Study design: Construction of an international walking scale by a modified Delphi technique. Objective: The purpose of the study was to develop a more precise walking scale for use in clinical trials of subjects with spinal cord injury (SCI) and to determine its validity and reliability. Setting: Eight SCI centers in Australia, Brazil, Canada (2), Korea, Italy, the UK and the US. Methods: Original items were constructed by experts at two SCI centers (Italy and the US) and blindly ranked in an hierarchical order (pilot data). These items were compared to the Functional Independence Measure (FIM) for concurrent validity. Subsequent independent blind rank ordering of items was completed at all eight centers (24 individuals and eight teams). Final consensus on rank ordering was reached during an international meeting (face validation). A videotape comprised of 40 clips of patients walking was forwarded to all eight centers and inter-rater reliability data collected. Results: Kendall coeAcient of concordance for the pilot data was significant (W=0.843, P50.001) indicating agreement among the experts in rank ordering of original items. FIM comparison (Spearman’s rank correlation coeAcient=0.765, P50.001) showed a theoretical relationship, however a practical diAerence in what is measured by each scale. Kendall coeAcient of concordance for the international blind hierarchical ranking showed significance (W=0.860, P50.001) indicating agreement in rank ordering across all eight centers. Group consensus meeting resulted in a 19 item hierarchical rank ordered ‘Walking Index for Spinal Cord Injury (WISCI)’. Inter-rater reliability scoring of the 40 video clips showed 100% agreement. Conclusions: This is the first time a walking scale for SCI of this complexity has been developed and judged by an international group of experts. The WISCI showed good validity and reliability, but needs to be assessed in clinical settings for responsiveness. Spinal Cord (2000) 38, 234‐243
Published: 2000
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13. Spinal cord injury: prognosis for ambulation based on quadriceps recovery

Author: G Zorn, K S Crozier, V Graziani, Gerald J. Herbison, John F. Ditunno, and Ling Ling Cheng
Subjects: Adult, Male, medicine.medical_specialty, Adolescent, Walking, Post injury, medicine, Humans, Exercise, Spinal cord injury, Spinal Cord Injuries, business.industry, Muscles, Early recovery, Quadriceps muscle, General Medicine, Middle Aged, Prognosis, medicine.disease, Spinal cord, Surgery, medicine.anatomical_structure, Neurology, Muscle strength, Female, Neurology (clinical), business
Abstract: The purpose of this study was to determine if early recovery of quadricep muscle strength post spinal cord injury (SCI) is a useful predictor of future ambulation. Seventeen C4-T10 motor incomplete (Frankel C) spinal cord injured patients admitted to our center between March 1988 and April 1990 were examined within 72 hours to one week post injury. All patients had initial quadricep strengthsor = 2/5 in both legs. Strength in the strongest quadricep was followed prospectively at intervals from admission to one year post injury. Recovery time to a3/5 quadricep was established for each patient. Patients were categorized into 2 groups: FA (n = 11) were those patients who achieved functional ambulation and NA (n = 6) were those subjects who were nonambulators. Functional ambulators were defined as those patients who were able to walk in the household and/or the community while non ambulators were those who either did not ambulate or did so only for exercise. All patients (n = 9) who achieved a3/5 quadricep by 2 months post SCI became functional ambulators whereas in the group of 8 patients who did not achieve a3/5 by 2 months, only 2 became functional ambulators. This result was found to be significant using a point-by-serial correlation with p0.05. In conclusion, motor incomplete spinal cord injured patients who recovered to a3/5 quadricep strength by 2 months post injury had an excellent prognosis for subsequent ambulation by 6 months post injury.
Published: 1992
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14. Long-term adherence to first-line highly active antiretroviral therapy in a hospital-based cohort: predictors and impact on virologic response and relapse

Author: V. Graziani, Giustino Parruti, S. Rotolo, F Schioppa, Augusta Consorte, B.A. Boyle, L. Alterio, G. Marani Toro, Lamberto Manzoli, G. D'amico, and P. Marani Toro
Subjects: Adult, Male, medicine.medical_specialty, Time Factors, First line, Socio-culturale, HIV Infections, Cohort Studies, Predictive Value of Tests, Recurrence, Internal medicine, Antiretroviral Therapy, Highly Active, Prevalence, Medicine, Humans, business.industry, Incidence (epidemiology), Public Health, Environmental and Occupational Health, Hospital based, Middle Aged, Antiretroviral therapy, Hospitals, Infectious Diseases, Italy, Predictive value of tests, Virologic response, Cohort, Physical therapy, HIV-1, Patient Compliance, RNA, Viral, Female, business, Cohort study
Abstract: A high level of adherence to highly active antiretroviral therapy (HAART) is essential to minimize the risk of treatment failure and HIV disease progression. This cohort study evaluated the prevalence and predictors of long-term adherence with first-line HAART in a hospital-based unselected sample of HIV patients from central Italy, and examined the association between adherence and virological response or relapse. Between July 1996 and June 2004, 171 patients (67.3% males; mean age, 41.2 years) were followed for at least 24 weeks and up to 8 years. Adherence was measured by patient self-reports and confirmed using pharmacy records. The prevalence of high-level adherence (or=90%) at 6 months was 88.3%; slightly less than 80% at 12 months. The incidence of adherence failure in the sample remained fairly stable until 24 months of follow-up, then it declined about 5% every 6 months. Cox analysis showed that compared to single/separated patients, homeless and married persons were, respectively, 1.95 times more likely and two times less likely to experience adherence failure (p0.05). The adjusted risk of adherence failure among patients who did not suffer drug-related toxicity was 0.57 (p0.05). Medication adherence was significantly associated with shorter time to virological response and longer time to relapse. Adherents were 1.69 times more likely to achieve viral suppression and nine times less likely to experience relapse than nonadherents (p0.01). Efforts at improving adherence should be prolonged for at least 24 months. A protective role of marriage for adherence failure is promising but requires confirmation in further research, that should also clarify the exact mechanisms determining the association.
Published: 2006

15. The pattern of reflex recovery during spinal shock

Author: Hyun-Yoon Ko, James W. Little, John F. Ditunno, and V. Graziani
Subjects: Adult, Male, medicine.medical_specialty, Statistics, Nonparametric, Central nervous system disease, Predictive Value of Tests, Medicine, Humans, Prospective Studies, Spinal cord injury, Spinal Cord Injuries, Reflex, Abnormal, business.industry, Spinal shock, General Medicine, Deep Tendon Reflex, medicine.disease, Spinal cord, Surgery, Ankle jerk reflex, medicine.anatomical_structure, Neurology, Anesthesia, Ambulatory, Reflex, Female, Neurology (clinical), business
Abstract: Study Design: A prospective descriptive study of the course of recovery of reflexes following acute spinal cord injury (SCI). Objectives: The purpose of the study was to observe the pattern of reflex recovery following acute SCI in order to determine the prognostic significance of reflexes for ambulation and their relationship to spinal shock. Setting: A regional spinal cord injury center in Philadelphia, Pennsylvania, USA. Methods: Fifty subjects admitted consecutively over a 9 month period and on the day of injury were observed for the following reflexes; bulbo-cavernosis (BC), delayed plantar response (DPR), cremasteric (CRM), ankle jerk (AJ), knee jerk (KJ), and normal plantar response for 5–7 days a week and 6–8 weeks duration. The 50 subjects were assessed for ambulation of 200 feet at time of discharge. MRI studies were reviewed on 13/28 complete (ASIA A) injuries. Results: Thirty-five subjects (28 ASIA A, 4 ASIA B, 3 ASIA C) had a DPR of 2 days or longer duration and these subjects were not ambulatory. The fourteen subjects (12 ASIA D and 2 ASIA C), who were ambulatory, either had no DPR (11/14) or had a DPR of only 1 days duration (3/14). One subject (ASIA B) was not ambulatory and had a DRP of 1 days duration. The DPR was the first reflex to recover most often, followed by the BC, CRM in the first few days and later followed by the deep tendon reflexes (AJ & KJ) by 1–2 weeks respectively. Less than 8% of subjects had no reflexes on the day of injury and the reflexes did not follow a caudal-rostral pattern of recovery. Conclusions: Prognosis for ambulation based on reflexes early after SCI should not be linked to current descriptions of spinal shock. In fact, the view of spinal shock, based on the absence of reflexes and the recovery of reflexes in a caudal to rostral sequence, is of limited clinical utility and should be discarded. The evolution of reflexes over several days following injury may be more relevant to prognosis than the use of the term spinal shock and the presence or absence of reflexes on the day of injury.
Published: 1999

16. Measurement of the quark and gluon fragmentation functions in Z0 hadronic decays

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andersson, P Andreazza, A Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbi, M Barbiellini, G Bardin, DY and Barker, G Baroncelli, A Barring, O Bates, MJ and Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Beloous, K Benvenuti, AC and Berat, C Berggren, M Bertini, D Bertrand, D and Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bizouard, MA Bloch, D Blume, M Bonesini, M and Bonivento, W Boonekamp, M Booth, PSL Borgland, AW and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Carena, F Carroll, L and Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chen, M Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Cindro, V Collins, P Colomer, M and Contri, R Cortina, E Cosme, G Cossutti, F Cowell, JH and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S Dahm, J Dalmagne, B Damgaard, G Dauncey, PD and Davenport, M Da Silva, W Deghorain, A Della Ricca, G and Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clerq, C De La Vaissiere, C De Lotto, B and De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A Dolbeau, J Doroba, K Dracos, M and Drees, J Drees, KA Dris, M Durand, JD Edsall, D and Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M and Engel, JP Erzen, B Falk, E Fanourakis, G Fassouliotis, D and Feindt, M Ferrari, P Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E and Fontanelli, F Formenti, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K Gumenyuk, S Gunther, M Guy, J Hahn, F Hahn, S and Hajduk, Z Hallgren, A Hamacher, K Harris, FJ Hedberg, V and Henriques, R Hernandez, JJ Herquet, P Herr, H and Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J and Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R and Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ and Klapp, O Klein, H Kluit, P Knoblauch, D Kokkinias, P and Koratzinos, M Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P and Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leisos, A Leitner, R Lemmonne, J Lenzen, G Lepeltier, V Lesiak, T Lethuillier, M Libby, J and Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG and Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Mahon, JR Maio, A Malmgren, TGM Malychev, V and Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A Martinez-Rivero, C and Martinez-Vidal, F Garcia, SM Masik, J Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R McPherson, G Medbo, J Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K and Monge, MR Morettini, P Mueller, H Muenich, K and Mulders, M Mundim, LM Murray, WJ Muryn, B Myatt, G and Myklebust, T Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Nikolenko, M and Niss, P Nomerotski, A Normand, A Nygren, A and Oberschulte-Beckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Orazi, G Ortuno, S Osterberg, K Ouraou, A and Paganini, P Paganoni, M Paiano, S Pain, R Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Pegoraro, M Peralta, L and Pernegger, H Pernicka, M Perrotta, A Petridou, C and Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Piotto, E Podobnik, T Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P and Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O and Romero, A Ronchese, P Roos, L Rosenberg, EI Rosinsky, P and Roudeau, P Rovelli, T Ruhlmann-Kleider, V Ruiz, A and Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J and Sannino, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Serbelloni, L Shellard, RC Sheridan, A Siegrist, P Silvestre, R Simonetto, F Sisakian, AN and Skaali, TB Skatchkov, N Smadja, G Smirnov, N Smirnova, O and Smith, GR Sokolov, A Solovianov, O Sosnowski, R and Souza-Santos, D Spassov, T Spiriti, E Sponholz, P and Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stavitski, I Stevenson, K Stocchi, A Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP and Tchikilev, O Tegenfeldt, F Terranova, F Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Tristram, G and Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA and Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O and Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Doninck, WK Van Eldik, J Van Lysebetten, A and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Weiser, C Wetherell, AM Wicke, D Wickens, JH and Wielers, M Wilkinson, GR Williams, WSC Winter, M and Wlodek, T Yi, J Yip, K Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaboration
Subjects: High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment
Abstract: The transverse, longitudinal and asymmetric components of the fragmentation function are measured from the inclusive charged particles produced in e(+)e(-) collisions at LEP. As in deep inelastic scattering, these data are important for tests of QCD. The transverse sigma(T) and longitudinal sigma(L) components of the total hadronic cross section sigma(tot) are evaluated from the measured fragmentation functions. They are found to be a sigma(T)/sigma(tot) = 0.949 +/- 0.001(stat.) +/- 0.007(syst.) and sigma(L)/sigma(tot) = 0.051 +/- 0.001(stat.) +/- 0.007(syst.) respectively. The strong coupling constant is calculated from sigma(L)/sigma(tot) in next-to-leading order of perturbative QCD, giving alpha(s)(M-Z) = 0.120 +/- 0.002(stat.) +/- 0.013(syst.) +/- 0.007(scale). Including non-perturbative power corrections :leads to alpha(s)(M-Z) = 0.101 +/- 0.002(stat.) +/- 0.013(syst.) +/- 0.007(scale). The measured transverse and longitudinal components of the fragmentation function are used to estimate the mean charged multiplicity, [n(ch)] = 21.21 +/- 0.01(stat.)+/- 0.20(syst.) The fragmentation functions and multiplicities in bb and light quark events are compared. The measured transverse and longitudinal components of the fragmentation function allow the gluon fragmentation function to be evaluated.
Published: 1999

17. Charged particle multiplicity in e(+)e(-)-> q(q)over-bar events at 161 and 172 GeV and from the decay of the W boson

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andersson, P Andreazza, A Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbi, M Bardin, DY Barker, G and Baroncelli, A Barring, O Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P Bizouard, MA Bloch, D Blume, M Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M and Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V and Collins, P Colomer, M Contri, R Cortina, E Cosme, G and Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S Dahm, J Dalmagne, B and Damgaard, G Dauncey, PD Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De la Vaissiere, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Feindt, M Fenyuk, A Ferrari, P Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E and Fontanelli, F Formenti, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL and Heuser, JM Higon, E Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P and Kaiser, M Kapusta, F Karafasoulis, K Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O and Klein, H Kluit, P Knoblauch, D Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kronkvist, I Krstic, J Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W and Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leisos, A and Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P and Lyons, L MacNaughton, J Maehlum, G Mahon, JR Maio, A and Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R and Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G and Medbo, J Meroni, C Meyer, S Meyer, WT Michelotto, M and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P and Mueller, H Muenich, K Mulders, M Mundim, LM Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Nikolenko, M Niss, P Nomerotski, A and Normand, A Nygren, A Oberschulte-Beckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Ortuno, S and Osterberg, K Ouraou, A Paganini, P Paganoni, M and Paiano, S Pain, R Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U and Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Piana, G Pierre, F Pimenta, M Piotto, E and Podobnik, T Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Roos, L Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T and Ruhlmann-Kleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salt, J Sannino, M and Schneider, H Schwickerath, U Schyns, MAE Sciolla, G and Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A and Sekulin, R Serbelloni, L Shellard, RC Sheridan, A and Siegrist, P Silvestre, R Simonetto, F Sisakian, AN and Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Solovianov, O Sosnowski, R Souza-Santos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stampfer, D and Stanescu, C Stanic, S Stapnes, S Stavitski, I Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP and Tchikilev, O Tegenfeldt, F Terranova, F Tomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Tristram, G and Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA and Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O and Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weiser, C Wetherell, AM Wicke, D Wickens, JH and Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T Yi, J Yip, K Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaborat
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: The data collected by DELPHI in 1996 have been used to measure the average charged particle multiplicities and dispersions in q (q) over bar events at centre-of-mass energies of root s = 161 GeV and root s = 172 GeV, and the average charge multiplicity in WW events at root s = 172 GeV. The multiplicities in q (q) over bar events are consistent with the evolution predicted by QCD. The dispersions in the multiplicity distributions are consistent with Koba-Nielsen-Olesen (KNO) scaling. The average multiplicity of charged particles in hadronic W decays has been measured for the first time; its value, 19.23 +/- 0.74(stat + syst), is consistent with that expected for an e(+)e(-) interaction at a centre-of-mass energy equal to the W mass. The charged particle multiplicity in W decays shows no evidence of effects of colour reconnection between partons from different W’s at the present level of statistics. (C) 1998 Elsevier Science B.V.
Published: 1998

18. Rapidity correlations in Lambda baryon and proton production in hadronic Z(0) decays

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barbi, M Bardin, DY Barker, G Baroncelli, A and Barring, O Bates, MJ Battaglia, M Begalli, M Beilliere, P Baubillier, M Baudot, J Becks, KH Belokopytov, Y and Belous, K Benvenuti, AC Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS and Billoir, P Bizouard, MA Bloch, D Blume, M Bonesini, M and Bonivento, W Booth, PSL Borgland, AW Borisov, G and Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Bozovic, I Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K and Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC and Cattai, A Cavallo, FR Chabaud, V Charpentier, P and Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cindro, V Collins, P Contri, R Cortina, E Cosme, G and Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De la Vaissiere, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Feindt, M Ferrari, P Ferrer, A Fichet, S Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D and Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Green, C and Grefrath, A Gris, P Grosdidier, G Grzelak, K Gumenyuk, S and Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S and Hajduk, Z Hallgren, A Hamacher, K Harris, FJ Hedberg, V and Henriques, R Hernandez, JJ Herquet, P Herr, H and Hessing, TL Heuser, JM Higon, E Hilke, HJ Holmgren, SO and Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M and Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, L Jonsson, P and Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Katsanevas, S Katsoufis, EC Keranen, R and Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ and Klapp, O Klein, H Kluit, P Knoblauch, D Koene, B and Kokkinias, P Koratzinos, M Korcyl, K Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kreuter, C and Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P and Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW and Lanceri, L Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Ledroit, F Lefebure, V Legan, CK and Leisos, A Leitner, R Lemonne, J Lenzen, G Lepeltier, V and Lesiak, T Libby, J Liko, D Lindner, R Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D and Lutz, P Lyons, L MacNaughton, J Maehlum, G Mahon, JR and Maio, A Malmgren, TGM Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J and Merk, M Meroni, C Meyer, S Meyer, WT Miagkov, A and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Muenich, K Mulders, M Mundim, LM and Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W and Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M and Nikolaenko, V Nikolenko, M Niss, P Nomerotski, A and Normand, A Oberschulte-Beckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Pain, R Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Piana, G Pierre, F Pimenta, M Podobnik, T and Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Ratoff, PN Read, AL Reale, M and Rebecchi, P Redaelli, NG Regler, M Reid, D Reinhardt, R and Renton, PB Resvanis, LK Richard, F Richardson, J and Ridky, J Rinaudo, G Romero, A Roncagliolo, I Ronchese, P and Roos, L Rosenberg, EI Roudeau, P Rovelli, T and Ruckstuhl, W Ruhlmann-Kleider, V Ruiz, A Rybicki, K and Saarikko, H Sacquin, Y Sadovsky, A Sahr, O Sajot, G and Salt, J Sannino, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Serbelloni, L Shellard, RC and Siegrist, P Silvestre, R Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Sosnowski, R Souza-Santos, D Spiriti, E and Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S Stavitski, I Stevenson, K Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tcherniaev, E Tegenfeldt, F and Terranova, F Thomas, J Tilquin, A Timmermans, J and Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G and Treille, D Tristram, G Trombini, A Troncon, C Tsirou, A and Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S and Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J and Van Lysebetten, A Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS and Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH and Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T Yi, J Yip, K Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zontar, D Zucchelli, GC and Zumerle, G DELPHI Collaborat
Subjects: Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract: In an analysis of multihadronic events recorded at LEP by DELPHI in the years 1992 through 1994, rapidity correlations of Lambda-Lambda, proton-proton, and Lambda-proton pairs are compared with each other and with the predictions of the string fragmentation model. For Lambda (p) over bar pairs, the additional correlation with respect to charged kaons is also analysed. (C) 1998 Elsevier Science B.V.
Published: 1998

19. m(b) at M-Z

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Andersson, P Andreazza, A Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A and Baillon, P Bambade, P Barao, F Barbi, M Barbiellini, G Bardin, DY Barker, G Baroncelli, A Barring, O and Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Belous, K and Benvenuti, AC Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS and Billoir, P Bizouard, MA Bloch, D Blume, M Bonesini, M and Bonivento, W Boonekamp, M Booth, PSL Borgland, AW and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Bozovic, I Bozzo, M and Branchini, P Brand, KD Brenke, T Brenner, RA Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M and Carena, F Carroll, L Caso, C Castillo Gimenez, MV and Cattai, A Cavallo, FR Chabaud, V Charpentier, P and Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cindro, V Collins, P Colomer, M Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D and Crosetti, G Maestro, JC Czellar, S Dahm, J Dalmagne, B Damgaard, G Dauncey, PD Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De la Vaissiere, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fanourakis, G Fassouliotis, D and Fayot, J Feindt, M Ferrari, P Ferrer, A Fichet, S and Firestone, A Fischer, PA Foeth, H Fokitis, E and Fontanelli, F Formenti, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S Haider, S and Hajduk, Z Hallgren, A Hamacher, K Harris, FJ Hedberg, V and Heising, S Henriques, R Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO and Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O and Klein, H Kluit, P Knoblauch, D Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kronkvist, I Krstic, J Krumstein, Z Kubinec, P Kucewicz, W Kurvinen, K and Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW and Langefeld, P Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Lefebure, V Legan, CK Leisos, A Leitner, R and Lemonne, J Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I and Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M Mc Cubbin, M and Mc Kay, R Mc Nulty, R Mc Pherson, G Medbo, J Meroni, C and Meyer, WT Miagkov, A Michelotto, M Migliore, E and Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R and Moenig, K Monge, MR Moreau, X Morettini, P Muenich, K Mulders, M Mundim, LM Murray, WJ Muryn, B Myatt, G and Myklebust, T Naraghi, F Navarria, FL Navas, S and Nawrocki, K Negri, P Nemecek, S Neufeld, N Neumann, W and Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M and Nikolaenko, V Nikolenko, M Niss, P Nomerotski, A and Normand, A Nygren, A Oberschulte-Beckmann, W Obraztsov, V and Olshevski, AG Orava, R Orazi, G Ortuno, S Osterberg, K Ouraou, A Paganini, P Paganoni, M Paiano, S Pain, R Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Parzefall, U Passeri, A Pegoraro, M and Peralta, L Pernegger, H Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Piana, G Pierra, F and Pimenta, M Piotto, E Podobnik, T Podobrin, O Pol, ME and Polok, G Poropat, P Pozdniakov, V Privitera, P and Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P and Redaelli, NG Regler, M Reid, D Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G and Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinsky, P and Roudeau, P Rovelli, T Ruhlmann-Kleider, V Ruiz, A and Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J and Sampsonidis, D Sannino, M Schneider, H Schwickerath, U and Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y and Segar, AM Segar, AM Seitz, A Sekulin, R Shellard, RC and Sheridan, A Siegrist, P Silvestre, R Simonetto, F and Sisakian, AN Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Sokolov, A Solovianov, O Sosnowski, R and Souza-Santos, D Spassov, T Spiriti, E Sponholz, P and Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stavitski, I Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tegenfeldt, F Terranova, F Thomas, J Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L and Transtromer, G Treille, D Tristram, G Trombini, A and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Weiser, C Wetherell, AM Wicke, D Wickens, JH and Wilkinson, GR Williams, WSC Winter, M Witek, M and Wlodek, T Wolf, G Yi, J Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The value of the Lr quark, mass at the M-Z scale defined in the renormalization scheme, m(b)(M-Z), was determined using 2.8 million hadronic Z decays collected during 1992-1994 by the DELPHI detector to be m(b)(M-Z) = 2.67 +/- 0.25 (stat.) +/- 0.34 (frag.) +/- 0.27 (theo.) GeV/c(2). The analysis considers NLO corrections to the three-jet production rate including mass effects, and the result obtained agrees with the QCD prediction of having a running b quark mass at an energy scale equal to M-Z. This is the first time that such a measurement is performed far above the production threshold. The study also verifies the flavour independence of the strong coupling constant for b and light quarks within 1% accuracy. (C) 1998 Elsevier Science B.V.
Published: 1998

20. Search for stable heavy charged particles in e(+)e(-) collisions at root s=130-136, 161 and 172 GeV

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barbi, M Barbiellini, G Bardin, DY Barker, G and Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Belous, K and Benvenuti, AC Berggren, M Bertini, D Bertrand, D and Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bizouard, MA Bloch, D Blume, M Bolognese, T and Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C and Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T and Brenner, RA Bricman, C Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P and Contri, R Cortina, E Cosme, G Cossutti, F Cowell, JH and Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C and Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClerq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L DiDiodato, A and Djama, F Djannati, A Dolbeau, J Doroba, K Dracos, M and Drees, J Drees, KA Dris, M Durand, JD Edsall, D and Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M and Engel, JP Erzen, B Santo, ME Falk, E Fassouliotis, D and Feindt, M Fenyuk, A Ferrer, A Fichet, S Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC and Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J and Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J and Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerber, JP Gerdyukov, L Gokieli, R Golob, B Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Harris, FJ and Hedberg, V Henriques, R Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA and Khovanski, NN King, B Kjaer, NJ Klapp, O Klein, H and Klovning, A Kluit, P Kokkinias, P Konopliannikov, A and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kronkvist, I and Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W and Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R and Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Libby, J and Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B and Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L and MacNaughton, J Maehlum, G Mahon, JR Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and MartinezRivero, C Martinezvidal, F Garcia, SMI Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M and McKay, R McNulty, R Medbo, J Merk, M Meroni, C and Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Muenich, K and Mulders, M Mundim, LM Murray, WJ Muryn, B Myatt, G and Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P and Nemecek, S Neumann, W Neumeister, N Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P and Nomerotski, A Normand, A Novak, M OberschulteBeckmann, W and Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Pain, R and Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Piana, G Pierre, F Pimenta, M Podobnik, T and Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A and Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI and Roudeau, O Rovelli, T RuhlmannKleider, V Ruiz, A and Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sahr, O and Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Serbelloni, L Shellard, RC and Siegrist, P Silvestre, R Simonetti, S Simonetto, F and Sisakian, AN Sitar, B Skaali, RB Smadja, G Smirnov, N and Smirnova, O Smith, GR Solovianov, O Sosnowski, R and SouzaSantos, D Spassov, T Spiriti, E Sponholz, P and Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stavitski, I Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tcherniaev, E Thomas, J Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L and Transtromer, G Treille, D Tristram, G Trombini, A and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW and VanDam, P VanDoninck, WK VanEldik, J VanLysebetten, A and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vodopyanov, AS Vrba, V Wahlen, H Walck, C and Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Abstract: A search for stable or long-lived heavy charged particles in e(+)e(-) interactions at energies of 130-136, 161 and 172 CeV has been performed using the data taken by the DELPHI experiment at LEP. The search is based on particle identification provided by the Time Projection Chamber and the Ring Imaging Cherenkov detector. Upper limits at 95% confidence level are derived on the cross-section for heavy long-lived pair-produced charge +/-e and +/-2/3e particles in the range of 0.4-2.3 pb for masses from 45 to 84 GeV/c(2). Within supersymmetric extensions of the Standard Model, long-lived charginos with masses from 45 to 84 (80) GeV/c(2) for high (low) sneutrino masses can be excluded at 95% confidence level. Left-handed (right-handed) long-lived or stable smuons and staus with masses between 45 and 68 (65) GeV/c(2) can be excluded at 95% confidence level. (C) 1997 Elsevier Science B.V.
Published: 1997

21. Search for the B-c meson

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Agustinus, A Baillon, P Bambade, P and Barao, F Barbi, M Barbiellini, G Bardin, DY Barker, G and Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Belous, K and Benvenuti, AC Berggren, M Bertini, D Bertrand, D and Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bizouard, MA Bloch, D Blume, M Bolognese, T and Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C and Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T and Brenner, RA Bricman, C Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P and Contri, R Cortina, E Cosme, G Cossutti, F Cowell, JH and Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C and Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DelaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L DiDiodato, A and Djama, F Djannati, A Dolbeau, J Doroba, K Dracos, M and Drees, J Drees, KA Dris, M Durand, JD Edsall, D and Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M and Engel, JP Erzen, B Santo, ME Falk, E Fassouliotis, D and Feindt, M Fenyuk, A Ferrer, A Fichet, S Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC and Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J and Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J and Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerber, JP Gerdyukov, L Gokieli, R Golob, B Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Harris, FJ and Hedberg, V Henriques, R Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA and Khovanski, NN King, B Kjaer, NJ Klapp, O Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M and Korcyl, K Kostioukhine, V Kourkoumelis, C Kouznetsov, O and Krammer, M Kreuter, C Kronkvist, I Krumstein, Z and Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW and Langefeld, P Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Lefebure, V Legan, CK Leitner, R Lemonne, J and Lenzen, G Lepeltier, V Lesiak, T Libby, J Liko, D and Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Mahon, JR Maio, A Malmgren, TGM and Malychev, V Mandl, E Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and MartinezRivero, C MartinezVidal, F Garcia, SM Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M and McKay, R McNulty, R Medbo, J Merk, M Meroni, C and Meyer, S Meyer, WT Miagkov, A Michelotto, M Migliore, E and Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T and Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H and Muenich, K Mulders, M Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P and Nomerotski, A Normand, A Novak, M OberschulteBeckmann, W and Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Pain, R and Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Passeri, A Pegoraro, M Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Piana, G Pierre, F Pimenta, M Podobnik, T and Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A and Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI and Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V and Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A and Sahr, O Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Serbelloni, L Shellard, RC and Siegrist, P Silvestre, R Simonetti, S Simonetto, F and Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N and Smirnova, O Smith, GR Solovianov, O Sosnowski, R and SouzaSantos, D Spassov, T Spiriti, E Sponholz, P and Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stavitski, I Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Thomas, J Tilquin, A Timmermans, J and Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G and Treille, D Tristram, G Trombini, A Troncon, C Tsirou, A and Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S and Ueberschaer, B Ullaland, O Uvarov, V VAlenti, G and Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P and VanDoninck, WK VanEldik, J VanLysebetten, A Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, E Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L and Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C and Weierstall, M Weihammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Abstract: In a sample of 3.02 million hadronic Z(0) decays collected by the DELPHI detector, 270 J/psi –> e(+)e(-) candidates have been selected. A search for fully reconstructed B-c(+/-) mesons has yielded one B-c(+/-) –> J/psi pi(+/-) candidate, no B-c(+/-) –> J/psi e(+/-) nu(e) candidates, and one B-c(+/-) –> J/psi pi(+)pi(-)pi(+) candidate, consistent with expected background in each channel. The following 90% confidence level upper limits ate determined: Br(Z(0) –> B-c(+/-) X) x Br(B-c(+/-) –> J/psi pi(+)) < (1.05 to 0.84) x 10(-4) and Br(Z(d) –> B-c(+/-) X) x Br(B-c(+/-) –> J/psi e(+/-) nu(e)) < (5.8 to 5.0) x 10(-5), where the ranges quoted correspond to the range of predicted B-c(+/-) lifetimes from 0.4 to 1.4 ps, and Br(Z(0) –> B-c(+/-) X) x Br(B-c(+/-) –> J/psi pi(+)pi(-)pi(+/-)) < 1.75 x 10(-4), constant over the range of predicted B-c(+/-) lifetimes. (C) 1997 Elsevier Science B.V.
Published: 1997

22. Search for B-s(0)-(B-s(0))over-bar oscillations

Author: Adam, W Adye, T Ajinenko, I Alekseev, GD Alemany, R and Allport, PP Almehed, S Amaldi, U Amato, S Andersson, P and Andreazza, A Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barbi, M Bardin, DY Barker, G Baroncelli, A and Barring, O Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y and Belous, K Benvenuti, AC Berat, C Berggren, M Bertini, D and Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P Bizouard, MA Bloch, D Blume, M and Bonesini, M Bonivento, W Boonekamp, M Booth, PSL and Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Bozovic, I and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M and Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Chapkin, M Charpentier, P and Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cindro, V Collins, P Colomer, M Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D and Crosetti, G Maestro, JC Czellar, S Dahm, J Dalmagne, B Damgaard, G Dauncey, PD Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De La Vaissiere, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Di Diodato, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Feindt, M Ferrari, P Ferrer, A Fichet, S Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D and Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gokieli, R Golob, B Goncalves, P Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Green, C and Grefrath, A Gris, P Grosdidier, G Grzelak, K Gunther, M and Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A and Hamacher, K Harris, FJ Hedberg, V Henriques, R and Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM and Higon, E Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P and Kaiser, M Kapusta, F Karafasoulis, K Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O and Klein, H Kluit, P Knoblauch, D Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kronkvist, I and Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W and Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leisos, A and Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P and Lyons, L Macnaughton, J Maehlum, G Mahon, JR Maio, A and Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R and Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Muenich, K Mulders, M Mundim, LM and Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F and Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Nieuwenhuizen, M Nikolaenko, V Nikolenko, M Niss, P and Nomerotski, A Normand, A Nygren, A Oberschulte-Beckmann, W and Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Ortuno, S Osterberg, K Ouraou, A Paganini, P and Paganoni, M Paiano, S Pain, R Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F and Parzefall, U Passeri, A Pegoraro, M Peralta, L and Pernegger, H Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Piana, G Pierre, F Pimenta, M and Piotto, E Podobnik, T Podobrin, O Pol, ME Polok, G and Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN and Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M and Reid, D Reinhardt, R Renton, PB Resvanis, LK and Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A and Ronchese, P Roos, L Rosenberg, EI Rosinsky, P Roudeau, P and Rovelli, T Ruckstuhl, W Ruhlmann-Kleider, V Ruiz, A and Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G and Salt, J Sannino, M Schneider, H Schwickerath, U and Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y and Segar, AM Seitz, A Sekulin, R Serbelloni, L Shellard, RC and Sheridan, A Siccama, I Siegrist, P Silvestre, R and Simonetto, F Sisakian, AN Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GE Solovianov, O Sosnowski, R and Souza-Santos, D Spassov, T Spiriti, E Sponholz, P and Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stavitski, I Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tegenfeldt, F Terranova, F and Thomas, J Tilquin, A Timmermans, J Tkatchev, LG and Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Waldner, F Weiser, C Wetherell, AM Wicke, D and Wickens, JH Wielers, M Wilkinson, GR Williams, WSC and Winter, M Witek, M Wlodek, T Yi, J Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zucchelli, GC and Zumerle, G DELPHI Collaboration
Abstract: Oscillations of B(s)(0)mesons were studied in events with a large transverse momentum lepton selected from 3.2 million hadronic Z(0) decays registered by DELPHI between 1991 and 1994. A limit on the mass difference between the physical B-s(0) states Delta m(s) > 6.5 ps(-1) at 95% C.L. was obtained by combining the results obtained in three channels. (C) 1997 Published by Elsevier Science B.V.
Published: 1997

23. A precise measurement of the B-d(0) meson lifetime using a new technique

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A and Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M and Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P Bizouard, MA Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M and Rozas, AJC Camporesi, T CAnale, V Canepa, M and Cankocak, K Cao, F Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chen, M Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Cindro, V Collins, P Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L DiDiodato, A Djama, F Djannati, A and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Durand, JD Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M and Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F and Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D and Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M and Gouz, Y Gracco, V Graziani, E Green, C Grefrath, A and Gris, P Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL and Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C and Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC and Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O Klein, H Klovning, A Kluit, P and Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Libby, J Liko, D Lindner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Mahon, JR Maio, A Malmgren, TGM Malychev, V and Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A MartinezRivero, C and MartinezVidal, F Garcia, SMI Masik, J Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S and Meyer, WT Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K and Monge, MR Morettini, P Mueller, H Muenich, K and Mulders, M Mundim, LM Murray, WJ Muryn, B Myatt, G and Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P and Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A and Normand, A Novak, M OberschulteBeckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A and Paganini, P Paganoni, M Pages, P Pain, R Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Petrovyck, M Phillips, HT Piana, G Pierre, F Podobrin, O and Pol, ME Polak, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S and Rahmani, H Ratoff, PN Read, AL Reale, M Rebecchi, P and Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I and Romero, A Roncagliolo, I Ronchese, P Roos, L and Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R and Serbelloni, L Shellard, RC Siegrist, P Silvestre, R and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchemiaev, E Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J and VanLysebetten, A Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS and Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D and Wickens, JH Wielers, M Wilkinson, GR Williams, WSC and Winter, M Witek, M Wlodek, T Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M and Zontar, D Zucchelli, GC Zumerle, G
Abstract: From data recorded by DELPHI between 1991 and 1994, which corresponds to 3.2 million hadronic Z(0) decays, a measurement of the meson lifetime, based on the inclusive reconstruction of 3520 +/- 150 semileptonic decays of the type –> D*+ l , has been performed, The result is: tau(B-d(0)) = 1.532 +/- 0.041(stat.) +/- 0.040(syst.)ps. The contribution to the systematic uncertainty which depends on external errors is +/-0.015.
Published: 1997

24. Neurological assessment in spinal cord injury

Author: J F, Ditunno, V, Graziani, and A, Tessler
Subjects: Humans, Multicenter Studies as Topic, Reference Standards, Spinal Cord Injuries
Abstract: Precise and reliable neurologic assessment is a necessary tool for determining the extent and pattern of recovery after SCI. Recently agreed upon international standards establish a uniform neurologic classification to measure clinical outcomes. They are currently in use in three multicenter studies in more than 40 SCI centers in the United States. The Model System SCI centers report the use of these measures, such as impairment grades and neurologic levels, in almost 15,000 cases over the past 20 years and, more recently, motor scores in 3,500 patients. The NASCIS II multicenter trial on methylprednisolone used motor and sensory scores as endpoints in close to 500 patients, but have incorporated the international standards, which include a disability measure, in NASCIS III. The study of ganglioside effectiveness also is using these measures in many patients. In more focused studies, neurologic assessment soon after injury can predict walking in motor complete injuries based on pin prick sensation, and in motor incomplete injuries based on impairment grade and age. Eventual upper extremity function can be estimated based on the motor examination within 72 hours of injury. Both the motor score and motor level are more reliable in predicting upper extremity function than the single sensory level. This presumably reflects the greater importance of motor recovery on functional outcome. The proximal muscles of the lower extremities caudal to the lesion site recover before distal muscles, and this may be mediated by axons descending in the ventral tracts, which control primarily proximal rather than distal muscles. These axons may be preferentially spared and/or have greater capacity to compensate than those present in the lateral columns. In conclusion, standard neurologic assessment in SCI is extremely valuable in monitoring recovery in order to prognosticate functional outcome, evaluate effectiveness of drug interventions, and provide valuable clues to possible underlying mechanisms of recovery. The elucidation of these mechanisms will aid in the refinement of current treatments and development of new strategies to enhance neurologic recovery and functional outcome.
Published: 1997

25. Measurement of the transverse spin correlation in Z->tau(+)tau(-) decays

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andersson, P Andreazza, A Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barbi, M Bardin, DY Barker, G Baroncelli, A and Barring, O Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y and Belous, K Benvenuti, AC Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS and Billoir, P Bizouard, MA Bloch, D Blume, M Bonesini, M and Bonivento, W Booth, PSL Borgland, AW Borisov, G and Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Bozovic, I Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P and Chochula, P Chorowicz, V Cindro, V Collins, P Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S and Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD and Davenport, M DaSilva, W Deghorain, A DellaRicca, G and Delpierre, P Demaria, N DeAngelis, A DeBoer, W and DeBrabandere, S DeClercq, C DelaVaissiere, C DeLotto, B and DeMin, A DePaula, L Dijkstra, H DiCiaccio, L DiDiodato, A Djannati, A Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA Dris, M Durand, JD Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Erzen, B Santo, ME Falk, ME Falk, E Fanourakis, G and Fassouliotis, D Feindt, M Ferrari, P Ferrer, A and Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H and Fokitis, E Fontanelli, F Formenti, F Franek, B and Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J and Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J and Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerber, JP Gokieli, R Golob, B Goncalves, P Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Green, C Grefrath, A Gris, P Grosdidier, G Grzelak, K and Gumenyuk, S Gunther, M Guy, J Hahn, F Hahn, S and Hajduk, Z Hallgren, A Hamacher, K Harris, FJ Hedberg, V and Henriques, R Hernandez, JJ Herquet, P Herr, H and Hessing, TL Heuser, JM Higon, E Hilke, HJ Holmgren, SO and Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M and Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and JeanMarie, B Johansson, EK Jonsson, L Jonsson, P and Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Katsanevas, S Katsoufis, EC Keranen, R and Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ and Klapp, O Klein, H Kluit, P Knoblauch, D Koene, B and Kokkinias, P Konopliannikov, A Koratzinos, M Korcyl, K and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P and Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leisos, A Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Libby, J Liko, D Lindner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Mahon, JR Maio, A Malmgren, TGM Malychev, V and Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A MartinezRivero, C and MartinezVidal, F Garcia, SMI Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Miagkov, A Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K and Monge, MR Morettini, P Mueller, H Muenich, K and Mulders, M Mundim, LM Murray, WJ Muryn, B Myatt, G and Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P and Nemecek, S Neumann, W Neumeister, N Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Nikolenko, M and Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Orazi, G Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F and Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Phillips, HT and Piana, G Pierre, F Pimenta, M Podobnik, T Podobrin, O and Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S and Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M and Rebecchi, P Redaelli, NG Reid, D Reinhardt, R Renton, PB and Resvanis, LK Richard, F Richardson, J Ridky, J and Rinaudo, G Romero, A Roncagliolo, I Ronchese, P Roos, L and Rosenberg, EI Roudeau, P Rovelli, T Ruckstuhl, W and RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sannino, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Serbelloni, L Shellard, RC Siegrist, P Silvestre, R Simonetto, F Sisakian, AN Sitar, B and Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sokolov, A Solovianov, O Sosnowski, R SouzaSantos, D and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S Stavitski, I and Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP and Tchikilev, O Tegenfeldt, E Terranova, F Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Tristram, G and Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA and Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O and Uvarov, V Valenti, G Vallazza, E VanderVelde, C and VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J and VanLysebetten, A Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS and Vilanova, D Vincent, P Vitale, L Vodopyanov, AS Vrba, V and Wahlen, H Walck, C Waldner, F Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T and Yi, J Yip, K Yushchenko, O Zach, F Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zontar, D Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics
Abstract: The measurement of the correlation between the transverse spin components of tau(+)tau(-) pairs collected during 1992 to 1994 with the DELPHI detector at LEP1 is presented. A value C-TT = 0.87 +/- 0.20 (stat.)(-0.12)(+0.10) (syst.) was obtained for the correlation parameter, in agreement with the Standard Model expectation. (C) 1997 Published by Elsevier Science B.V.
Published: 1997

26. Production of Sigma(0) and Omega(-) in Z decays

Author: Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Andreazza, A Andrieux, ML Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A and Baillon, P Bambade, P Barao, F Barate, R Barbi, M and Bardin, DY Baroncelli, A Barring, O Barrio, JA and Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J and Becks, KH Begalli, M Beilliere, P Belokopytov, Y and Beloous, K Benvenuti, AC Berggren, M Bertrand, D and Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D and Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Borisov, G Bosio, C Bosworth, S Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brillault, L Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Cerrito, L Chabaud, V Chapkin, M and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, G Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Dufour, Y Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Ershaidat, N Erzen, B Santo, ME Falk, E Fassouliotis, D and Feindt, M Ferrer, A Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, A Gandelman, H Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gerdyukov, L Gibbs, M Gokieli, R Golob, B Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P and Gunther, M Guy, J Hahn, F Hahn, S Hallgren, A and Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R and Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C and Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC and Keranen, R Khomenko, BA Khovanski, NN King, B Kjaer, NJ and Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Kramer, PH Krammer, M Kreuter, C and Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P and Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Last, I and Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J and Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Maio, A Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C and Markou, A Maron, T MartinezRivero, C MartinezVidal, F and Garcia, SM Masik, J Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P and Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Osterberg, K and Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M and Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P and Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P and Redaelli, NG Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I and Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W and RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J and Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U and Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y and Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Toet, DZ and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristam, G Trombini, A and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW and VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR and Williams, WSC Winter, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D and Zuberi, R Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Reconstructed ii baryon decays and photon conversions in DELPHI are used to measure the Sigma(0) production rate from hadronic Z(0) decays at LEP. The number of Sigma(0) decays per hadronic Z decay is found to be: > = 0.070 +/- 0.010 (stat.) +/- 0.010 (syst.). The Omega(-) production rate is similarly measured to be: = 0.0014 +/- 0.0002 (stat.) +/- 0.0004 (syst.) by a combination of methods using constrained fits to the whole decay chain and particle identification.
Published: 1996

27. Study of radiative leptonic events with hard photons and search for excited charged leptons at root s=130-136 GeV

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Barbiellini, G Bardin, DY Baroncelli, A and Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M and Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M and Bertini, D Bertrand, D Bianchi, F Bigi, M Bilenky, MS and Billoir, P Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L and Buran, T Burgsmueller, T Buschmann, P Buys, A and Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T and Canale, V Canepa, M Cankocak, K Cao, F Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Charpentier, P Chaussard, L Chauveau, J and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dehm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DelaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, JA Dris, M Durand, JD Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M and Fenyuk, A Ferrer, A Fichet, S Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F and Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G and Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K and Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Kramer, PH Krammer, M Kreuter, C and Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P and Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J and Lenzen, G Lepeltier, V Lesiak, T Libby, J Liko, D and Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F and Garcia, SMI Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J and Merk, M Meroni, C Meyer, S Meyer, WT Miagkov, A and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N and Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V and Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A and Pegoraro, M Peralta, L Pernegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M and Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Prest, M Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J and Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I and Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W and RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R and Serbelloni, L Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sokolov, A Sosnowski, R SouzaSantos, D Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanderVelde, C VanApeldoorn, GW VanDam, P vanDoninck, WK and VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D and Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V and Wahlen, H Walck, C Weierstall, M Weilhammer, P and Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR WIlliams, WSC Winter, M Witek, M and Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: During the last 1995 data acquisition period at LEP, the DELPHI experiment collected an integrated luminosity of 5.9 pb(-1) at centre-of-mass energies of 130 GeV and 136 GeV. Radiative leptonic events (e, mu, tau) With high energy photons were studied and compared to Standard Model predictions. The data were used to search for charged excited leptons decaying through an electromagnetic transition. No significant signal was found. From the search for pair produced excited leptons, the limits m(e)* > 62.5 GeV/c(2), m(mu)* > 62.6 GeV/c(2) and m(tau)* > 62.2 GeV/c(2) at 95% confidence level were established. For single excited lepton production, upper limits on the ratio lambda/m(l)* of the coupling of the excited charged lepton to its mass were derived.
Published: 1996

28. First measurement of f'(2)(1525) production in Z(0) hadronic decays

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Barbiellini, G Bardin, DY Baroncelli, A and Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M and Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M and Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M and Bonivento, W Booth, PSL Bosio, C Bosworth, S Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brillault, L Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Cerrito, L Chabaud, V Chapkin, M and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, GA Chen, M Chierici, R Chochula, P Chorowicz, V and Chudoba, J Cindro, V Collins, P Contreras, JL and Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB and Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClercq, C DelaVaissiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M and Doroba, K Dracos, M Drees, J Drees, KA Dris, M and Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T and Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B and Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A and Ferrer, A Filippas, TA Firestone, A Fischer, PA and Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B and Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R and FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L and Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G and Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K and Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Kramer, PH Krammer, M Kreuter, C and Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P and Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y and Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D and Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F and Garcia, SMI Masik, J Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N and Nicolaidou, R Neilsen, BS Nieuwenhuizen, M Nikolaenko, V and Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Orava, R and Osterberg, K Ouraou, A Paganini, P Paganoni, M and Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M and Peralta, L Pernegger, H Pernicka, M Perrotta, A and Petridou, C Petrolini, A Petrovyck, M Phillips, HT and Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S and Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Renton, PB Resvanis, LK Richard, F Richardson, J and Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I and Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P and Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A and Rybicki, K Rybin, A Saarikko, H Sacquin, Y Sadovsky, A and Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Shellard, RC Siccama, I and Siegrist, P Simonetti, S Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Sosnowski, R SouzaSantos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strub, R and Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T and Tavernet, JP Tcherniaev, E Tchikilev, O Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Toet, DZ and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Valenti, G and Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P and VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G and Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E and Vodopyanov, AS Vrba, V Wahlen, H Walck, C Weierstall, M and Weilhammer, P Weiser, C Wetherell, AM Wicke, D and Wickens, JH Wielers, M Wilkinson, GR Williams, WSC and Winter, M Witek, M Woschnagg, K Yip, K Yushchenko, O and Zach, F Zaitsev, A Zalewska, Z Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: The inclusive production of the f(2)’(1525) in hadronic Z(0) decays has been studied in data collected by the DELPHI detector at LEP. The Ring Imaging Cherenkov detectors were important tools in the identification of the decay f(2)’(1525) –> K+K-. The average number of f(2)(’)(1525) produced per hadronic Z decay, [f(2)’] = 0.020 +/- 0.005 (stat) +/- 0.006 (syst), and the momentum distribution of the f(2)’(1525) have both been measured. The mass and width of the f(2)’(1525) are found to be [M(f2)’] = 1535 +/- 5 (stat) +/- 4 (syst) MeV/c(2). [Gamma(f2)’] = 60 +/- 20 (stat) +/- 19 (syst) MeV/c(2)
Published: 1996

29. Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Alemany, R. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W-D. Arnoud, Y. Åsman, B. Augustin, J-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbi, M. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenke, T. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Buys, A. Cabrera, S. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chen, M. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.-A. Dris, M. Dufour, Y. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J-P. Ershaidat, N. Erzen, B. Espirito Santo, M. Falk, E. Fassouliotis, D. Feindt, M. Fenyuk, A. Ferrer, A. Filippas, T.A. Firestone, A. Fischer, P.-A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gibbs, M. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Graziani, E. Grosdidier, G. Grzelak, K. Gumenyuk, S. Gunnarsson, P. Gunther, M. Guy, J. Hahn, F. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S-O. Holt, P.J. Holthuizen, D. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kapusta, F. Karafasoulis, K. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, K. Kourkoumelis, C. Kouznetsov, O. Kramer, P.-H. Krammer, M. Kreuter, C. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Last, I. Laugier, J-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopez, J.M. Loukas, D. Lutz, P. Lyons, L. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti I Garcia, S. Masik, J. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Medbo, J. Merk, M. Meroni, C. Meyer, S. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Novak, M. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Petrovyck, M. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Pindo, M. Plaszczynski, S. Podobrin, O. Po, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schimmelpfennig, M. Schneider, H. Schwickerath, U. Schyns, M.A.E. Sciolla, G. Scuri, F. Seager, P. Sedykh, Y. Segar, M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stapnes, S. Stavitski, I. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Weierstall, M. Weilhammer, P. Weiser, C. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Abstract: Semileptonic decays B → D*- ℓ+νX were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*- π+ states was performed and the ratio of the branching fractions: Br(B → D*- ℓ+νX)/Br(B → D*- ℓ+νX) + Br(B0 → D*- ℓ+ν) = 0.19 ± 0.10(stat) ± 0.06(syst) was determined. Taking into account this contribution, the differential decay width of B0 → D*- ℓ+ν was measured as a function of the momentum transfer from the B to the D*- in two separate analyses, using exclusive and inclusive methods of D*- ℓ+ reconstruction. The distributions were fitted over the full momentum transfer range to extract the product of |V cb| times the normalization of the decay form factor F(q max2): F(qmax2)|Vcb| = (35.4 ± 1.9(stat) ± 2.4(syst)) • 10-3. The value of |Vcb| was computed using theoretical calculations of F(q max2), giving: |Vcb| = (38.9 ± 2.0(stat) ± 2.6(syst) ± 1.7(theory)) • 10-3. The total branching fraction Br(B0 → D*- ℓ+ν) was determined to be: Br(B0 → D*- ℓ+ν) = (5.52 ± 0.17(stat) ± 0.68(syst))%.
Published: 1996

30. Determination of vertical bar V-cb vertical bar from the semileptonic decay B-0->D*(-)l(+)nu

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Barbiellini, G Bardin, DY Baroncelli, A and Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M and Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M and Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M and Bonivento, W Booth, PSL Borisov, G Bosio, C and Bosworth, S Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD and Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L and Chabaud, V Chapkin, M Charpentier, P Chaussard, L and Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cindro, V Collins, P Contreras, JL Contri, R Cortina, E and Cosme, G Cossutti, F Crawley, HB Crennell, D and Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J and Dalmagne, B Dam, M Damgaard, G Dauncey, PD and Davenport, M DaSilva, W Defoix, C Deghorain, A and DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M and Doroba, K Dracos, M Drees, J Drees, KA Dris, M and Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T and Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B and Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A and Ferrer, A Filippas, TA Firestone, A Fischer, PA and Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B and Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R and FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M and Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W and Harris, FJ Hedberg, V Henriques, R Hernandez, JJ and Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA and Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A and Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW and Langefeld, P Last, I Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Lefebure, V Legan, CK Leitner, R and Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T and Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B and Liken, JG Lopez, JM Loukas, D Lutz, P Lyons, L and Maehlum, G Maio, A Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C and Markou, A Maron, T MartinezRivero, C MartinezVidal, F and Garcia, SMI Masik, J Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N and Nicolaidou, R Nielsen, BS Nieuwenhuizer, M Nikolaenko, V and Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A and Pegoraro, M Peralta, L Pemegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M and Plaszcyzynski, S Podoborin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahman, H Ratoff, PN and Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M and Reid, D Benton, PB Resvanis, LK Richard, F and Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A and Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V and Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Shellard, RC Siccama, I and Siegrist, P Simonetti, S Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Toet, DZ and Tomaradze, A Tonazzo, A Tortora, L Transtromer, G and Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW and VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C and Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewska, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M and Zontar, D Zuberi, R Zucchelli, GC Zumerle, G
Abstract: Semileptonic decays B –> D*(-)l(+)nu X were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*(-)pi(+) states was performed and the ratio of the branching fractions: Br(B –> D*(-)l(+)nu X)/Br(B –> D*(-)l(+)nu X) + Br(B-0 –> D*(-)l(+)nu) = 0.19 +/- 0.10(stat) +/- 0.06(syst) was determined. Taking into account this contribution, the differential decay width of B-0 –> D*(-)l(+)nu was measured as a function of the momentum transfer from the B to the D*(-) in two separate analyses, using exclusive and inclusive methods of D*(-) reconstruction. The distributions were fitted over the full momentum transfer range to extract the product of /V-cb/ times the normalization of the decay form factor F(q(max)(2)): F(q(max)(2))/V-cb/ = (35.4 +/- 1.9(stat) +/- 2.4(syst)) . 10(-3). The value of /V-cb/ was computed using theoretical calculations of F(q(max?2), giving: /V-cb/ = (38.9 +/- 2.0(stat) +/- 2.6(syst) +/- 1.7(theory)) . 10(-3). The total branching fraction Br(B-0 –> D*(-)l(-)nu) was determined to be: Br(B-0 –> D*(-)l(+)nu) = (5.52 +/- 0.17(stat) +/- 0.68(syst))%.
Published: 1996

31. An upper limit for Br(Z(0)->ggg) from symmetric 3-jet Z(0) hadronic decays

Author: Abreu, P Adam, W Adye, T Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A and Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M and Baubillier, M Baudot, J Becks, KH Begalli, M and Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P Bizouard, MA Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M and Rozas, AJC Camporesi, T Canale, V Canepa, M and Cankocak, K Cao, F Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chen, M Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Cindro, V Collins, P Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClerq, C DelaVaissiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L DiDiodato, A Djama, F Dolbeau, J and Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A and Ferrer, A Fichet, S Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L and Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M and Gouz, Y Gracco, V Graziani, E Green, C Grefrath, A and Gris, P Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL and Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B and Johansson, EK Jonsson, L Jonsson, P Joram, C and Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC and Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O Klein, H Klovning, A Kluit, P and Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Libby, J Liko, D Lindner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Mahon, JR Malmgren, TGM Malychev, V Mandl, F and Marco, J Marco, R Marechal, B Margoni, M Marin, JC and Mariotti, C Markou, A MartinezRivero, C MartinezVidal, F and Garcia, SMI Masik, J Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Muenich, K Mulders, M Mundim, LM and Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Podobrin, O and Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S and Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M and Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB and Resvanis, LK Richard, F Richardson, J Ridky, J and Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P and Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T and Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K and Saarikko, H Sacquin, Y Sadovsky, A Sahr, O Sajot, G and Salt, J Sanchez, J Sannino, M Schimmelpfennig, M and Schneider, H Schwickerath, U Schyns, MAE Sciolla, G and Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A and Sekulin, R Serbelloni, L Shellard, RC Siegrist, P and Silvestre, R Simonetti, S Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnova, O Smith, GR and Sokolov, A Sosnowski, R SouzaSantos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O and Thomas, J Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanApeldoorn, GW VanDam, P VanEldik, J VanLysebetten, A and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR Williams, WSC Winter, M Witek, M Wlodek, T and Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Abstract: An upper limit for BR(Z(0) –> 3g) is obtained from a correlation method, which distinguishes statistically between quark and gluon jets by using the difference in their charged particle multiplicity distributions. From the sample of threefold symmetric three-jet events collected by the DELPHI experiment at LEP during 1991-1994, the 95% confidence level upper limit is deduced to be: BR(Z(0) –> 3g) less than or equal to 1.6 x 10(-2) for the JADE and BR(Z(0) –> 3g) less than or equal to 1.5 x 10(-2) for the DURHAM jet-finder.
Published: 1996

32. Search for pair production of heavy objects in 4-jet events at root s=130-136 GeV

Author: Adam, W Adye, T Agasi, E Ajinenko, I Alekseev, GD and Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S and Andreazza, A Andrieux, ML Antilogus, P Apel, WD Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barate, R Barbi, M Barbiellini, G Bardin, DY and Baroncelli, A Baring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Belous, K and Benvenuti, AC Berggren, M Bertini, D Bertrand, D and Besancon, M Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bloch, D Blume, M Bolognese, T Bonesini, M and Bonivento, W Booth, PSL Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A and Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T and Canale, V Canepa, M Cankocak, K Cao, F Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Cowell, JH Crawley, HB Crennell, D Crosetti, G and Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B and Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C DEghorain, A DellaRicca, G Delpierre, P and Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S and DeClercq, C DeLaVaissiere, C DeLotto, B DeMin, A and DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L and DiDiodato, A Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Durand, JD and Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G and Elsing, M Engel, JP Erzen, B Santo, ME Falk, E and Fassouliotis, D Feindt, M Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E and Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG FuldaQuenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M and Gouz, Y Gracco, V Graziani, E Green, C Grefrath, A and Gris, P Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V and Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J and Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johnsson, EK Jonsson, L Jonsson, P Joram, C and Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC and Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klapp, O Klein, H Klovning, A Kluit, P and Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Libby, J Liko, D Lindner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J and Maehlum, G Mahon, JR Maio, A Malmgren, TGM Malychev, V and Mandi, F Marco, R Marechal, B Margoni, M Marin, JC and Mariotti, C Markou, A MartinezRivero, C MartinezVidal, F and Garcia, SMI Masik, J Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R Nulty, RM and Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT and Miagkov, A Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K and Monge, MR Morettini, P Mueller, H Muenich, K Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Niewenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Renton, PB Resvanis, LK Richard, F Richardson, J and Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I and Ronchese, P Roos, L Rosenberg, EJ Rosso, E Roudeau, P and Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A and Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sahr, O and Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Serbelloni, L Shellard, RC and Siccama, I Siegrist, P Silvestro, R Simonetti, S and Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G and Smirnov, N Smirnova, O Smith, GR Sokolov, A and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Weierstall, M Weilhammer, P Weiser, C and Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K and Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, ZI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Experiment
Abstract: Results are presented of a search for pair production of heavy objects decaying into four hadronic jets, as expected for example from associated or pair production of MSSM Higgs bosons, hA or H+H-, using a data sample of 5.9 pb(-1) of e(+)e(-) collisions at root s = 130-136 GeV collected with the DELPHI detector at LEP in November 1995. The data and expectations from standard processes agree after four-jet selections. An analysis based on b-tagging finds no hA candidate with high mass. A study optimized to search for H+H- events with mass in the 40-50 GeV/c(2) range also finds no candidate, Finally a comparison is made with a recent ALEPH analysis which found an excess of four-jet events with high multiplicity and high mass. Such a signal is not observed in the DELPHI data, although a slight excess in the mass region around 105 GeV/c(2) is seen.
Published: 1996

33. Measurement of inclusive K(0)(892), phi(1020) and K-2(0)(1430) production in hadronic Z decays

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O Barrio, JA and Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J and Becks, KH Begalli, M Beilliere, P Belokopytov, Y and Belous, K Benvenuti, AC Berggren, M Bertini, D Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D and Blume, M Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M and Rozas, AJC Camporesi, T Canale, V Canepa, M and Cankocak, K Cao, F Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, M and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chen, M Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB and Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClercq, C DeLaVassiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M and Doroba, K Dracos, M Drees, J Drees, KA Dris, M and Durand, JD Edsall, D Ehret, R Eigen, G Ekelof, T and Ekspong, G Elsing, M Engel, JP Erzen, B Santo, ME and Falk, E Fassouliotis, D Feindt, M Ferrer, A Fichet, S and Filippas, TA Firestone, A Fischer, PA Foeth, H and Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F and Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C and Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerberg, JP Gerdyukov, L Gibbs, M and Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Gresdidier, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W and Harris, FJ Hedberg, V Henriques, R Hernandez, JJ and Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, G and Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F and Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA and Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A and Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Kramer, PH and Krammer, M Kreuter, C Kronkvist, I Krumstein, Z and Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW and Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R and Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V and Lesiak, T Libby, J Liko, D Lindner, R Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D and Lutz, P Lyons, L Maehlum, G Maio, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A Maron, T and MartinezRivero, C MartinezVidal, F Garvia, SMI Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M and McKay, R McNulty, R Medbo, J Merk, M Meroni, C and Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Muenich, K and Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F and Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S and Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Niewenhuizen, M Nikolaenko, V Niss, P Nomerotski, A and Normand, A Novak, M OberschulteBeckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A and Paganini, P Paganoni, M Pages, P Pain, R Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M and Plaszczynski, S Podobrin, O Pol, ME Polok, G and Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P and Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I and Romero, A Roncagliolo, I Ronchese, P Roos, L and Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R and Serbelloni, L Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simenetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanApeldoorn, GW VanDam, P VanEldik, J Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR and Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M and Zontar, D Zucchelli, GC Zumerle, G
Abstract: The inclusive production of the neutral vector mesons K-*0(892) and phi(1020), and of the tensor meson K-2(*0)(1430), in hadronic decays of the Z has been mea sured by the DELPHI detector at LEP. The average production rates per hadronic Z decay have been determined to be 0.77 +/- 0.08 K-2(*0)(892), 0.104 +/- 0.008 phi(1020) and 0.079 +/- 0.040 K-2(*0)(1430). The ratio of the tensor-to-vector meson production yields, [K-2(*0)(1430)]/[K-*0(892)] = 0.10 +/- 0.05, is smaller than the [f(2)(1270)]/[rho(0)(770)] and [f’(2)(1525)]/[phi(1020)] ratios measured by DELPHI. The production rates and differential cross sections are compared with the predictions of JETSET 7.4 tuned to the DELPHI data and of HERWIG 5.8. The K-*0(892) and phi(1020) data are compatible with model predictions, but a large disagreement is observed for the K-2(*0)(1430).
Published: 1996

34. Search for anomalous production of single photons at root s=130 and 136 GeV

Author: Adam, W Adye, T Agasi, E Ajinenko, L Aleksan, R and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Andreazza, A Andrieux, ML Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A and Baillon, P Bambade, P Barao, F Barate, R Barbi, M and Barbiellini, G Bardin, DY Baroncelli, A Barring, O and Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M and Baudot, J Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Belous, K Benvenuti, AC Berggren, M and Bertini, D Bertrand, D Bianchi, F Bigi, M Bilenky, MS and Billoir, P Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L and Buran, T Burgsmueller, T Buschmann, P Buys, A and Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T and Canale, V Canepa, M Cankocak, K Cao, F Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Charpentier, P Chaussard, L Chauveau, J and Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DelaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Durand, JD Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M and Fenyuk, A Ferrer, A Fichet, S Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F and Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G and Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K and Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Kramer, PH Krammer, M Kreuter, C and Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P and Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y and Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Libby, J and Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B and Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L and MacNaughton, J Maehlum, G Maio, A Malychev, V Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F and Garcia, SMI Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J and Merk, M Meroni, C Meyer, S Meyer, WT Miagkov, A and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N and Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V and Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A and Pegoraro, M Peralta, L Pernegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M and Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Prest, M Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J and Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I and Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EL Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W and RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R and Serbelloni, L Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Weierstall, M Weilhammer, P Weiser, C and Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K and Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Subjects: Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: This letter reports the results of the measurement of single photon production in the reaction e(+)e(-) –> gamma+ invisible particles at centre-of-mass energies root s = 130 and 136 GeV and an integrated luminosity of 5.83 pb(-1), collected with the DELPHI detector at LEP. The signal is compatible with the prediction of the Standard Model for the process e(+)e(-) –> nugamma, and the number of neutrino families has been determined to be N-nu = 3.1 +/- 0.6. Limits have been derived on anomalous neutral gauge boson couplings and on compositeness in the framework of a specific model.
Published: 1996

35. Search for exclusive decays of the Lambda(b) baryon and measurement of its mass

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, A Bambade, P Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O and Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M and Baudot, J Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D and Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D and Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Borisov, G Bosio, C Bosworth, S Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brillault, L Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Cerrito, L Chabaud, V Chapkin, M and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Dufour, Y Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Ershaidat, N Erzen, B Santo, ME Falk, E Fassouliotis, D and Feindt, M Fenyuk, A Ferrer, A Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC and Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J and Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J and Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerber, JP Gibbs, M Gokieli, R Golob, B Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E and Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P and Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z and Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V and Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J and Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C and Juillot, P Kaiser, M Kapusta, F Karafasoulis, K and Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC and Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B and Kokkinias, P Koratzinos, M Korcyl, K Kourkoumelis, C and Kouznetsov, O Kramer, PH Kreuter, C Kronkvist, I and Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W and Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW and Lanceri, L Lane, DW Langefeld, P Last, I Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V and Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D and Lutz, P Lyons, L MacNaughton, J Maehlum, G Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A Maron, T and MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J and Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M and McCubbin, M McKay, R McNulty, R Medbo, J Merk, M and Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E and Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T and Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H and Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F and Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A and Novak, M OberschulteBeckmann, W Obraztsov, V Olshevski, AG and Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A and Pegoraro, M Peralta, L Pernegger, H Pernicka, M and Perrotta, A Petridou, C Petrolini, A Petrovyck, M and Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M and Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P and Pozdniakov, V Prest, M Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN and Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M and Reid, D Renton, PB Resvanis, LK Richard, F and Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A and Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V and Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Shellard, RC Siccama, I and Siegrist, P Simonetti, S Simonetto, F Sisakian, AN and Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O and Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Toet, DZ and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW and VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR and Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M and Zontar, D Zuberi, R Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: A search for fully reconstructed Lambda(b)(0) beauty baryons is performed using about 3 million Z decays collected with the DELPHI detector at LEP. The analysis relies on the combined use of the accurate tracking and of the hadron identification capabilities of DELPHI. A total of four events has been found, three in the Lambda(c)(+)pi(-) channel and one in the Lambda(c)(+)a(1)(-) channel over a small background. The Lambda(b)(0) beauty baryon mass is measured to be (5668 +/- 16 (stat.) +/-8 (syst.)) MeV/c(2).
Published: 1996

36. Performance of the DELPHI detector

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Alvsvaag, SJ Amaldi, U Amato, S Andreazza, A and Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P and Barao, F Barate, R Barbiellini, G Bardin, DY Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ and Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M and Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Bosworth, S and Botner, O Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M and Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Puschmann, P and Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carrilho, P Carroll, L Caso, C Gimenez, MVC and Cattai, A Cavallo, FR Cerrito, L Chabaud, V and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Dufour, Y Dupont, F Edsall, D and Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M and Engel, JP Ershaidat, N Erzen, B Santo, ME Falaleev, V and Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H and Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F and Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C and Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y and Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S and Hajduk, Z Hallgren, A Hamacher, K Hao, W Harris, FJ and Hedberg, V Henriques, R Hernandez, JJ Herquet, P and Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS and Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S and Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Karyukhin, A and Katsanevas, S Katsoufis, EC Keranen, R Khomenko, BA and Khovanski, NN King, B Kjaer, NK Klein, H Klovning, A and Kluit, P Koene, B Kokkinias, P Koratzinos, M and Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW and Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R and Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V and Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I and Loerstad, B Loken, JG Lopez, JM Aguera, MAL Loukas, D and Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A and Malychev, V Mandl, F Marco, J Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A Marson, T and MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J and Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M and MCCubbin, M McKay, R McNulty, R Medbo, J Meroni, C and Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM and Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N and Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V and Niss, P Nomerotski, A Normand, A OberschulteBeckmann, W and Obraztsov, V Olshevski, AG Onofre, A Orava, R and Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P and Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L and Perevozchikov, V Pernegger, H Perrotta, A Petridou, C and Petrolini, A Petrovyck, M Phillips, HT Piana, G and Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M and Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL and Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D and Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I and Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P and Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A and Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G and Salt, J Sanchez, J Sannino, M Schimmelpfennig, M and Schneider, H Schwickerath, U Schyns, MAE Sciolla, G and Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A and Sekulin, R Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnov, O Smith, GR and Solovianov, O Sosnowski, R SouzaSantos, D Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T and Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J and Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A and Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S and Ueberschaer, B Ullaland, O Valenti, G Vallazza, E and VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK and VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D and Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V and Wahlen, H Walck, C Weierstall, M Weilhammer, P and Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR Williams, WSC Winter, M Witek, M and Woschnagg, K Yip, K Zach, F Zaitsev, A Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G
Subjects: Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract: DELPHI (DEtector with Lepton, Photon and Hadron Identification) is a detector for e(+)e(-) physics, designed to provide high granularity over a 4 pi solid angle, allowing an effective particle identification, It has been operating at the LEP (Large Electron-Positron) collider at CERN since 1989. This article reviews its performance.
Published: 1996

37. Measurement of the partial decay width R(b)(0)=Gamma(b(b)over-bar)/Gamma(had) of the Z with the DELPHI detector at LEP

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O and Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M and Baudot, J Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D and Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D and Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W and Booth, PSL Borisov, G Bosio, C Bosworth, S Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brillault, L Brown, RCA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Cerrito, L Chabaud, V Charpentier, P and Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R and Cortina, E Cosme, G Cossutti, F Crawley, HB and Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoer, W DeBrabandere, S DeClercq, C DelaVaissiere, C and DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M and Doroba, K Dracos, M Drees, J Drees, KA Dris, M and Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T and Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B and Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A and Ferrer, A Filippas, TA Firestone, A Fischer, PA and Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B and Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R and FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U and Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M and Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W and Harris, FJ Hedberg, V Henriques, R Hernandez, JJ and Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katargin, A and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kourkoumelis, C Kouznetsov, O and Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K and Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Last, I Laugier, JP and Lauhakangas, R Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V and Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I and Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P and Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V and Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A Maron, T and MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J and Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M and McCubbin, M McKay, R McNulty, R Medbo, J Merk, M and Meroni, C Meyer, S Meyer, WT Miagkov, A Michelotto, M and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moeller, R Moenig, K Monge, MR Morettini, P and Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G and Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P and Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A and Normand, A OberschulteBeckmann, W Obraztsov, V Olshevski, AG and Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD and Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A and Pegoraro, M Pernegger, H Pernicka, M Perrotta, A and Petridou, C Petrolini, A Petrovyck, M Phillips, HT and Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S and Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN and Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M and Reid, D Renton, PB Resvanis, LK Richard, F and Richardson, J Ridky, J Rinaudo, G Ripp, I Roncagliolo, I and Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A and Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G and Salt, J Sanchez, J Sannino, M Schimmelpfennig, M and Schneider, H Schwickerath, U Schyns, MAE Sciolla, G and Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A and Sekulin, R Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Solovianov, O Sosnowski, R SouzaSantos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J and Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A and Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S and Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P and VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G and Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E and Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F and Weierstall, M Weilhammer, P Weiser, C Wetherell, AM and Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K and Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M and Zontar, D Zuberi, R Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The partial decay width of the Z to quark pairs has been measured by the DELPHI detector at LEP. B-hadrons, containing b-quarks, were tagged by several methods using tracks with large impact parameters to the primary vertex complemented sometimes by event shape variables or using leptons with high transverse momentum relative to the hadron, In order to reduce the systematic uncertainties, in all methods the b-tagging efficiency has been extracted directly from the data. Combining all methods, the value: Gamma()/Gamma(had) = 0.2216 +/- 0.0016(stat.) +/- 0.0021(syst.) was found, where the production fraction was fixed to its Standard Model value.
Published: 1996

38. Measurement of the Bd0 oscillation frequency using kaons, leptons and jet charge

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Alemany, R. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barate, R. Barbi, M. Bardin, D.Y. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenke, T. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Buys, A. Cabrera, S. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chen, M. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.-A. Dris, M. Dufour, Y. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Espirito Santo, M. Falk, E. Fassouliotis, D. Feindt, M. Fenyuk, A. Ferrer, A. Filippas, T.A. Firestone, A. Fischer, P.-A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gibbs, M. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Graziani, E. Grosdidier, G. Grzelak, K. Gumenyuk, S. Gunnarsson, P. Gunther, M. Guy, J. Hahn, F. Hahn, S. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kapusta, F. Karafasoulis, K. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, K. Kourkoumelis, C. Kouznetsov, O. Kramer, P.-H. Krammer, M. Kreuter, C. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Last, I. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopez, J.M. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti I Garcia, S. Masik, J. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Medbo, J. Merk, M. Meroni, C. Meyer, S. Meyer, W.T. Miagkov, A. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Petrovyck, M. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Pindo, M. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schimmelpfennig, M. Schneider, H. Schwickerath, U. Schyns, M.A.E. Sciolla, G. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stapnes, S. Stavitski, I. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Weierstall, M. Weilhammer, P. Weiser, C. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Experiment
Abstract: A measurement of the mass difference, Δmd, between the two physical Bd0 states has been obtained from the analysis of the impact parameter distribution of a lepton emitted at large transverse momentum (pt) relative to the jet axis and from the analysis of the flight distance distribution of secondary vertices tagged by either a high pt lepton or an identified kaon. In the opposite hemisphere of the event, the charge of the initial quark has been evaluated using a high pt lepton, a charged kaon or the mean jet charge. With 1.7 million hadronic Z0 decays recorded by DELPHI between 1991 and 1993, Δmd is found to be: Δmd = 0.531-0.046+0.050 (stat.) ± 0.078 (syst.) ps-1. © Springer-Verlag 1996.
Published: 1996

39. Study of rare b decays with the DELPHI detector at LEP

Author: Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Andreazza, A Andrieux, ML Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A and Baillon, P Bambade, P Barao, F Barate, R Barbi, M and Bardin, DY Baroncelli, A Barring, O Barrio, JA and Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J and Becks, KH Begalli, M Beilliere, P Belokopytov, Y and Benvenuti, AC Berggren, M Bertini, D Bertrand, D and Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D and Blume, M Bolognese, T Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M and Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C and Brown, RCA Bruckman, P Brunel, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Buys, A Cabrera, S and Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V and Canepa, M Cankocak, K Cao, F Carena, F Carroll, L and Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Durand, JD Edsall, D Ehret, R and Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M and Fenyuk, A Ferrer, A Fichet, S Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F and Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A and Gamba, D Gandelman, M Garcia, C Garcia, J Gasper, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G and Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hann, S Hajduk, Z Hallgren, A Hamacher, K and Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E and Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y and Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H and Klovning, A Kluit, P Koene, B Kokkinias, P and Koratzinos, M Korcyl, K Kourkoumelis, C Kouznetsov, O and Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K and Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L and Lane, DW Langefeld, P Last, I Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK and Leitner, R Lemoigne, Y Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Libby, J Liko, D Lidner, R and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM and Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G and Maio, A Malychev, V Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A Maron, T and MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J and Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M and McCubbin, M McKay, R McNulty, R Medbo, J Merk, M and Meroni, C Meyer, S Meyer, WT Miagkov, A Michelotto, M and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moeller, R Moenig, K Monge, MR Morettini, P and Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G and Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P and Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A and Normand, A Novak, M OberschulteBeckman, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A and Paganini, P Paganoni, M Pages, P Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M and Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P and Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P and Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G and Ripp, L Romero, A Roncagliolo, I Ronchese, P Roos, L and Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F and Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N and Smirnova, O Smith, GR Sokolov, A Solovianov, O and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Tavernet, JP Tchikilev, O Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, LA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK and VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D and Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V and Wahlen, H Walck, C Waldner, F Weierstall, M and Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M and Witek, M Woschnagg, K Yip, K Yushchenko, O Zach, F and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Abstract: Rare decays of beauty particles were studied in several charmless modes using the data collected with the DELPHI detector at LEP from 1991 to 1994. These decays are mediated by both tree level b–>u and one-loop penguin b–>s, d transitions. Evidence for charmless B decays was obtained in two body hadronic modes. The branching ratios of B-d,s(0) to pi(+)pi(-) or K(+)pi(-) and B-u(-) to rho(0) pi(-) or K(*0)pi(-) were found to be (2.8(-1.0)(+1.5) +/- 0.2) x 10(-5) and (1.7(-0.8)(+1.2) +/- 0.2) x 10(-4) respectively. The fraction of these decays with a charged kaon in the final state that is not from the spectator s quark, was measured to be 0.58 +/- 0.18. Upper limits were set at 90% confidence level on the branching ratios for three and four body charmless hadronic decays in the range of (1-3) x 10(-4), for inclusive radiative b–>s gamma decays at 5.4 x 10(-4), for inclusive radiative b–>s gamma decays at 5.4 x 10(-4), for the exclusive radiative decays B-d(0)–>K*(892)(0) gamma and B-s(0)–>phi(1020)gamma at 2.1 x 10(-4) and 7.0 x 10(-4) respectively, and for dineutrino decays, b–>, in the exclusive channels B-d(0)–>K*(892)(0) nu and B-2(0)–>phi(1020) at 1.0x10(-3) respectively. The limits on dineutrino decays constrain theories with a new U(1) gauge boson coupling predominantly to the third family of fermions.
Published: 1996

40. Search for high mass gamma gamma resonances in e(+)e(-)->l(+)l(-)gamma gamma, nu(nu)over-bar-gamma gamma and q(q)over-bar-gamma gamma at LEP I

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O and Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M and Baudot, J Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Benvenuti, AC Berggren, M Bertini, D and Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bloch, D Blume, M Bolognese, T Bonesini, M and Bonivento, W Booth, PSL Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA and Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A and Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T and Canale, V Canepa, M Cankocak, K Cao, F Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P and Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F and Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M and Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N and Angelis, A DeBoer, W DeBrabandere, S DeClercq, C and DelaVaissiere, C DeLotto, B DeMin, A DePaula, L and SaintJean, CD Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Durand, JD Edsall, D Ehret, R Eigen, G and Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Fichet, S Filippas, TA Firestone, A and Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG and Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C and Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP and Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G and Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hallgren, A Hamacher, K Hao, W and Harris, FJ Hedberg, V Henriques, R Hernandez, JJ and Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA and Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A and Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K and Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M and Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W and Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Last, I and Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J and Lenzen, G Lepeltier, V Lesiak, T Libby, J Liko, D and Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malmgren, TGM Malychev, V and Mandl, F Marco, J Marco, R Marechal, B Margoni, M and Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F and Matteuzii, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merck, M Meroni, C Meyer, S and Meyer, WT Miagkov, A Michelotto, M Migliore, E and Mirabito, L Mitaroff, M Mjoernmark, U Moa, T Moeller, R and Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Newmann, W and Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M and Nikolaenko, V Niss, P Nomerotski, A Normand, A Novak, M and OberschulteBeckmann, W Obraztsov, V Olshevski, AG and Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P and Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F and Passeri, A Pegorano, M Peralta, L Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT and Piana, G Pierre, F Pimenta, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M and Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Ratoff, PN Read, AL Reale, M and Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB and Resvanis, LK Richard, F Richardson, J Ridky, J and Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P and Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T and Ruckstuhl, W RuhlmannKleider, V Ruiz, A Saarikko, H and Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J and Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H and Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R and Serbelloni, L Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Solovianov, O Sosnowski, R SouzaSantos, D Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, L Stevenson, K Stichelbaut, F Stocchi, A and Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O and Thomas, J Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tonazzo, A and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanderVelde, C VanApeldoorn, GW VanDam, P VanEldik, J and Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P and Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H and Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR Williams, WSC Winter, M Witek, M and Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G
Subjects: Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment
Abstract: A search for high mass photon pairs from the processes e(+)e(-) –> l(+)l(-)gamma gamma, e(+)e(-) –> and e(+)e(-) –> nu nu gamma gamma with the DELPHI detector at LEP I is reported. From a data sample containing 3.5 million hadronic Z(0) decays, collected by DELPHI during the years 1991 to 1994, 79 events with two charged leptons and two isolated photons were selected with photon pair masses above 10 GeV/c(2), where 76 +/- 6 events were predicted from standard sources. In the same data sample, no candidates were found and no accumulation of events was visible for gamma gamma masses above 10 GeVlc2 in the q channel. Upper limits at 95% confidence level on the Z(0) branching ratios for the three different channels were extracted from the data. In the mass region m(gamma gamma) > 30 CeV/c(2) the limits obtained are between 3x10(-6) and 4x10(-6).
Published: 1996

41. Measurement of inclusive π0 production in hadronic Z0 decays

Author: Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Allport, P.P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Y. Belous, K. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bocci, V. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenke, T. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Buys, A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carrilho, P. Carroll, L. Caso, C. Gimenez, M.V.C. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Charpentier, P. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Maestro, J.C. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Deghorain, A. Ricca, G.D. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.-A. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Santo, M.E. Falk, E. Fassouliotis, D. Feindt, M. Ferrer, A. Filippas, T.A. Firestone, A. Fischer, P.-A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Gerber, J.-P. Gerdyukov, L. Gibbs, M. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Y. Gracco, V. Graziani, E. Grosdidier, G. Grzelak, K. Gumenyuk, S. Gunnarsson, P. Gunther, M. Guy, J. Hahn, F. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kapusta, F. Karafasoulis, K. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koene, B. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.-H. Krammer, M. Kreuter, C. Krolikowski, J. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Lapin, V. Last, I. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez, J.M. Lopez-Fernandez, A. Lopez Aguera, M.A. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Maocun, C. Marco, J. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Medbo, J. Meroni, C. Meyer, S. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Negri, P. Nemecek, S. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Petrovyck, M. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Pindo, M. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schimmelpfennig, M. Schneider, H. Schwickerath, U. Schyns, M.A.E. Sciolla, G. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stapnes, S. Stavitski, I. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Velde, C.V. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Weierstall, M. Weilhammer, P. Weiser, C. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zacharatou, C. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Abstract: An analysis is presented of inclusive π0 production in Z0 decays measured with the DELPHI detector. At low energies, π0 decays are reconstructed by using pairs of converted photons and combinations of converted photons and photons reconstructed in the barrel electromagnetic calorimeter (HPC). At high energies (up to {Mathematical expression}) the excellent granularity of the HPC is exploited to search for two-photon substructures in single showers. The inclusive differential cross section is measured as a function of energy for qq and bb events. The number of π0's per hadronic Z0 event is N(π0)/Zhad0 =9.2±0.2(stat)±1.0(syst) and for bb events the number of π0's is N(π0)/bb=10.1±0.4(stat)±1.1(syst). The ratio of the number of π0's in bb events to hadronic Z0 events is less affected by the systematic errors and is found to be 1.09±0.05±0.01. The measured π0 cross sections are compared with the predictions of different parton shower models. For hadronic events, the peak position in the ξp=ln(1/xp) distribution is ξ*p =3.90-0.14+0.24 . The average number of π0's from the decay of primary B hadrons is found to be N(B→π0 X)/B hadron=2.78±0.15(stat)±0.60(syst). © 1996 Springer-Verlag.
Published: 1995

42. SEARCH FOR EXCLUSIVE CHARMLESS B-MESON DECAYS WITH THE DELPHI DETECTOR AT LEP

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML and ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTINUS, A and BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T and BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C and BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENKE, T BRENNER, RA BRICMAN, C BRILLAULT, L and BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T and BURGSMUELLER, T BUSCHMANN, P BUYS, A CACCIA, M CALVI, M and ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M and CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L and CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L and CHABAUD, V CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHIERICI, R CHLIAPNIKOV, P and CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F and CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W and DEFOIX, C DELLARICCA, G DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A and DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L and DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M and DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F and EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G and ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME and FALK, E FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, N GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GELE, D GERBER, JP GERDYUKOV, L GIBBS, M and GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L and GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G and GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F and HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K and HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ and HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D and HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P and JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L and JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G and KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W and KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW and LANCERI, L LANE, DW LANGEFELD, P LAST, I LAUGIER, JP and LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V and LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P and LYONS, L MACNAUGHTON, J MAEHLUM, G MALYCHEV, V MANDL, F and MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F and GARCIA, SMI MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J and MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E and MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R and MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W and NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIEUWENHUIZEN, M and NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A and OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A and ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P and PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L and PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, P PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H and RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I and ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L and ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y and SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y and SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O and SMITH, GR SOKOLOV, A SOLOVYANOV, O SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SPONHOLZ, P and SQUARCIA, S STANESCU, C STAPNES, S STAVITSKI, I and STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T and TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W and TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B and ULLALAND, O UVAROV, V VALENTI, G VALAZZA, E VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WL VANELDIK, J and VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V and WAHLEN, H WALCK, C WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K and YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI and ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G
Subjects: High Energy Physics::Experiment
Abstract: Charmless hadronic decays of beauty mesons have been searched for using the data collected with the DELPHI detector at the LEP collider. Several two, three and four-body decay modes have been investigated. Particle identification was used to distinguish the final states with protons, kaons and pious. Three candidate events selected in two-body decay modes are interpreted as evidence for charmless B decays. No excess has been found in higher multiplicity modes and improved upper limits for some of the branching ratios are given.
Published: 1995

43. Lifetime of charged and neutral B hadrons using event topology

Author: Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Allport, P.P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Anykeyev, V. Apel, W.D. Arnoud, Y. Åsman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bocci, V. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buys, A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carrilho, P. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Daum, A. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.A. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Espirito Santo, M. Falk, E. Fassouliotis, D. Feindt, M. Ferrer, A. Filippas, T.A. Firestone, A. Fischer, P.A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Frhwirth, R. Fulda-Quenzer, F. Furstenau, H. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gibbs, M. Gillespie, D. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Graziani, E. Grosdidier, G. Gunnarsson, P. Gunther, M. Guy, J. Haedinger, U. Hahn, E. Hahn, M. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Ioannou, P. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, K. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krammer, M. Kreuter, C. Krolikowski, J. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, K. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Lapin, V. Last, I. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez, J.M. Lopez-Fernandez, A. Lopez Aguera, M.A. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Marco, J. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Cubbin, M.Mc. Kay, R.M. Nulty, R.M. Medbo, J. Meroni, C. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, G. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Negri, P. Nemecek, S. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Passeri, A. egoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavitski, I. Stepaniak, K. Stichelbaut, F. Stocchi, A. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wehr, A. Weierstall, M. Weilhammer, P. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zacharatou, C. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhigunov, V. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Abstract: The lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge of the B candidate is taken to be the sum of the charges of the particles in the secondary vertex. Approximately 1,434,000 multihadronic Z0 decays yielded 1817 B hadron candidates. The B purity was estimated to be around 99.1±0.3%, and 83% (70%) of the events measured as neutral (charged) came from neutral (charged) B's. The mean lifetimes of charged and neutral B hadrons were found to be 1.72±0.08 (stat.) ±0.06 (syst.) ps and 1.58±0.11 (stat.)±0.09 (syst.) ps respectively. The ratio of their lifertimes, τcharged/τneutral, was 1.09-0.10+0.11 (stat.)±0.08 (syst.). By making assumptions about the Bs0 and Λb0 states, the B+ and B0 meson lifetimes were determined to be τB+ = 1.72 ± 0.08 (stat.) ±0.06 (syst.) ps and τB+ = 1.63 ± 0.14 (stat.)±0.13 (syst.) ps and the ratio of their lifetimes was: τB+/τB0 = 1.06-0.11+0.13 ±0.10. The mean B lifetime was also deduced to be < τ > = 1.64 ±0.06 (stat.)±0.04 (syst.) ps. © 1995 Springer-Verlag.
Published: 1995

44. MEASUREMENT OF DELTA(++)(1232) PRODUCTION IN HADRONIC-Z-DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML and ANTILOGUS, P ANYKEYEV, V APEL, WD ARNOUD, Y ASMAN, B and AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T and BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENKE, T and BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BURGSMUELLER, T and BUSCHMANN, P BUYS, A CACCIA, M CALVI, M ROZAS, AJC and CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F and CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHIERICI, R CHLIAPNIKOV, P CHOCHULA, P and CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB and CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W DEFOIX, C and DELLARICCA, G DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L and DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J and DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M and ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E and FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FUSTER, J and GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D and GERBER, JP GIBBS, M GOKIELI, R GOLO, B GOPAL, G and GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E and GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A and HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ and HOLTHUIZEN, D HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K and IOANNOU, P JACKSON, JN JACOBSSON, R JALOCHA, P and JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK and JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M and KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W and KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW and LANCERI, L LANE, DW LANGEFELD, P LAPIN, V LAST, I and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J and LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M and LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL and LOUKAS, D LUTZ, P LYONS, L MAEHLUM, G MAIO, A and MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M and MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SMI MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R and MCNULTY, R MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M and MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G and NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S and NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS and NIEUWENHUIZEN, M NIKOLAENKO, V NISS, P NOMEROTSKI, A and NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG and ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD and PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M and PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M and PINDO, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P and PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H and RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G and RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L and ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K RYBIN, A and SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEAGER, P SEDYKH, Y SEGAR, AM SEITZ, A and SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SPONHOLZ, P and SQUARCIA, S STANESCU, C STAPNES, S STAVITSKI, I and STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T and TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W and TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, E VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V and WAHLEN, H WALCK, C WALDNER, F WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH and WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F and ZACHARATOU, C ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHIGUNOV, V ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A measurement of the Delta(++)(1232) inclusive production in hadronic decays of the Z at LEP is presented, based on 1.3 million hadronic events collected by the DELPHI detector in the 1994 LEP running period. The DELPHI ring imaging Cherenkov counters are used for identifying hadrons. The average Delta(++)(1232) multiplicity per hadronic event is 0.079 +/- 0.015 which is more than a factor of two below the JETSET, HERWIG and UCLA model predictions. It agrees with a recently proposed universal mass dependence of particle production rates in e(+)e(-) annihilations.
Published: 1995

45. A measurement of B+ and B0 lifetimes using Mathematical expression events

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Allport, P.P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bocci, V. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buys, A. Caccia, M. Calvi, M. Rozas, A.J.C. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carrilho, P. Carroll, L. Caso, C. Gimenez, M.V.C. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Maestro, J.C. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Daum, A. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Ricca, G.D. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.-A. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Falk, E. Fassouliotis, D. Feindt, M. Fenyuk, A. Ferrer, A. Filippas, T.A. Firestone, A. Fischer, P.-A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furstenau, H. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gibbs, M. Gillespie, D. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Graziani, E. Grosdidier, G. Gunnarsson, P. Gunther, M. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Joannou, P. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.-H. Krammer, M. Kreuter, C. Krolikowski, J. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Last, I. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez, J.M. Lopez-Fernandez, A. Aguera, M.A.L. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Marco, J. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, R. Mc Kay, R. Mc Nulty, R. Medbo, J. Meroni, C. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Negri, P. Nemecek, S. Neumann, W. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronjin, V. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Sanchez, J. Sannino, M. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovyanov, O. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavitski, I. Stepaniak, K. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wehr, A. Weierstall, M. Weilhammer, P. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zacharatou, C. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Subjects: Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A measurement of B meson lifetimes is presented using data collected from 1991 to 1993 by the DELPHI detector at the LEP collider. Samples of events with a D meson and a lepton in the same jet are selected where {Mathematical expression} and D*ℓ+ events originate mainly from the semileptonic decays of B+ and B0 mesons, respectively. From the reconstructed B decay length and the estimated B momentum, taking into account the dilution due to B decays into {Mathematical expression}, the following B meson lifetimes and lifetime ratio are measured: {Mathematical expression} and an average lifetime of B+ and B0 mesons is obtained: {Mathematical expression} © 1995 Springer-Verlag.
Published: 1995

46. A MEASUREMENT OF THE TAU-LEPTONIC BRANCHING FRACTIONS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML and ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O and BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M and BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M BERTRAND, D and BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D and BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C BOSWORTH, S and BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENKE, T and BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BURGSMUELLER, T and BUSCHMANN, P BUYS, A CACCIA, M CALVI, M ROZAS, AJC and CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F and CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHIERICI, R CHLIAPNIKOV, P and CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F and CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W and DEFOIX, C DELLARICCA, G DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A and DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L and DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M and DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F and EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G and ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME and FALK, E FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FUSTER, J and GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D and GERBER, JP GIBBS, M GOKIELI, R GOLOB, B GOPAL, G and GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E and GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HALLGREN, A HAMACHER, K and HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ and HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D and HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P and JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L and JONSSON, P JORAM, C JUILLOT, P KAISER, M KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B and KOKKINIAS, P KORATZINOS, M KORCYL, K KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C and KROLIKOWSKI, J KRONKVIST, I KRUMSTEIN, Z KRUPINSKI, W and KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW and LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM and LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L and MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC and MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C and MARTINEZVIDAL, F GARCIA, SMI MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W and NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIEUWENHUIZEN, M and NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A and OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A and ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P and PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L and PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H and RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I and ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L and ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y and SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y and SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O and SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T and SPIRITI, E SPONHOLZ, P SQUARCIA, S STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K STICHELBAUT, F STOCCHI, A and STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M and SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O and TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G and TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDONINCK, WK VANELDIK, J VASSILOPOULOS, N and VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V WAHLEN, H WALCK, C WALDNER, F WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D and WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O and ZACH, F ZACHARATOU, C ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M and ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A sample of 25000 Z(0) –> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and 1992 is used to measure the leptonic branching fractions of the tau lepton. The results are B(tau –> e nu) = (17.51+/-0.39)% and B(tau –> mu nu) = (17.02+/-0.31)%. The ratio of the muon and electron couplings to the weak charged current is measured to be g(mu)/g(e) = 1.000+/-0.013, satisfying e-mu universality. The average leptonic branching fraction corrected to the value for a massless lepton, assuming e-mu universality, is found to be B(tau –> l nu) = (17.50+/-0.25)%.
Published: 1995

47. Search for promptly produced heavy quarkonium states in hadronic Z decays

Author: Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I and Aleksan, R Alekseev, GD Allport, PP Almehed, S Alvsvaag, SJ Amaldi, U Amato, S Andreazza, A Andrieux, ML and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, A and Baillon, P Bambade, P Barao, F Barate, R Barbiellini, G and Bardin, DY Barker, GJ Baroncelli, A Barring, O and Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M and Baudot, J Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Belous, K Benvenuti, AC Berggren, M and Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P and Bloch, D Blume, M Blyth, S Bocci, V Bolognese, T and Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C and Bosworth, S Botner, O Bouquet, B Bourdarios, C and Bowcock, TJV Bozzo, M Banchini, P Brand, KD Brenke, T and Brenner, RA Bricman, C Brillault, L Brown, RCA and Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T and Buschmann, P Buys, A Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F and Carena, F Carrilho, P Carroll, L Casco, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V and Charpentier, P Chaussard, L Chauveau, J Checchia, P and Chelkov, GA Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB and Crennell, D Crosetti, G Maestro, JC Czellar, S and DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G and Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A and DeBoeck, H DeBoer, W DeBrabandere, S DeClercq, C and DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L and DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F and Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J and Drees, KA Dris, M Dufour, Y Dupont, F Edsall, D and Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M and Engel, JP Ershaidat, N Erzen, B Santo, ME Falk, E and Fassouliotis, D Feindt, M Ferrer, A Filippas, TA and Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC and Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J and Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J and Gasper, C Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerber, JP Gibbs, M Gokieli, R Golob, G Gorn, L and Gorski, M Gouz, Y Gracco, V Graziani, G Grzelak, K and Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F and Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W and Harris, FJ Hedberg, V Henriques, R Hernandez, JJ and Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ and Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, G and Jarry, P JeanMaire, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F and Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S and Katsoufis, EC Keranen, R Khomenko, BA Khovanski, NN and King, B Kjaer, NJ Klein, H Klovning, A Kluit, P and Koene, B Kokkinias, P Koratzinos, M Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M and Kreuter, C Krolikowski, J Kronkvist, I Krumstein, Z and Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, L Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK and Leitner, R Lemoigne, Y Lemonne, J Lenzen, G and Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A and Lippi, I Loerstad, B Lokajicek, M Loken, JG Lopez, JM LopezFernandez, A Aguera, MAL Loukas, D Lutz, P and Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V and Maocun, C Marco, J Marechal, B Margoni, M Marin, JC and Mariotti, C Markou, A Maron, T MartinezRivero, C and MartinezVidal, F MartiGarcia, S Matorras, F Matteuzzi, C and Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R and Medbo, J Meroni, C Meyer, S Meyer, WT Miagkov, A and Michelotto, M Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B and Myatt, G Naraghi, F Navarria, FL Navas, S Negri, P and Nemecek, S Neumann, W Neumeister, N Nicolaidou, R and Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P and Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V and Olshevski, AG Onofre, A Orava, R Osterberg, K and Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M and Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P and Pukhaeva, N Radojicic, D Ragazzi, S Rahmani, H Rames, J and Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK and Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, L and Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W and RuhlmannKleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M and Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE and Scilla, G Scuri, F Seager, P Sedykh, Y Segar, AM and Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P and Simonetti, S Simonetto, F Sisakian, AN Sitar, B and Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stapnes, S and Stavitski, L Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T and Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J and Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B and Tortora, L Transtromer, G Treille, D Trischuk, W and Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML and Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E and VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK and VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D and Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V and Wahlen, H Walck, C Weierstall, ME Weilhammer, P and Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M and Wilkinson, GR Williams, WSC Winter, M Witek, M and Woschnagg, K Yip, K Yushchenko, O Zach, F Zacharatou, C and Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R and Zucchelli, GC Zumerle, G
Subjects: High Energy Physics::Experiment
Abstract: A search has been made for direct production of heavy quarkonium states in more than 3 million hadronic Z(0) decays in the 1991-1994 DELPHI data, Prompt J/psi, psi(2S) and Upsilon candidates have been searched for through their leptonic decay modes using criteria based on the kinematics and decay vertex positions. New upper limits are set at the 90% confidence level for Br(Z(0) –> (Q (Q) over bar) X)/Br(Z(0) –> hadrons) for various strong production mechanisms of J/psi and Upsilon; these range down to 0.9 x 10(-4). The limits are set in the presence of a small excess (similar to 1% statistical probability of a background fluctuation) in the sum of candidates from prompt J/psi, psi(2S), Upsilon(1S), Upsilon(2S) and Upsilon(3S) relative to the estimated background.
Published: 1995

48. B* production in Z decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Allport, P.P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bocci, V. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buys, A. Caccia, M. Calvi, M. Rozas, A.J.C. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carrilho, P. Carroll, L. Caso, C. Gimenez, M.V.C. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Maestro, J.C. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Daum, A. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Ricca, G.D. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Drees, K.A. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Santo, M.E. Falk, E. Fassouliotis, D. Feindt, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furstenau, H. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gele, D. Gerber, J.-P. Gerdyukov, L. Gibbs, M. Gillespie, D. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Graziani, E. Grosdidier, G. Gunnarsson, P. Gunther, M. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Ioannou, P. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, K. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krammer, M. Kreuter, C. Krolikowski, J. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Lapin, V. Last, I. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez, J.M. Lopez-Fernandez, A. Aguera, M.A.L. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Marco, J. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Cubbin, M.M. Kay, R.Mc. Nulty, R.Mc. Medbo, J. Meroni, C. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Negri, P. Nemecek, S. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Orava, R. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronjin, V. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavitski, I. Stepaniak, K. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wehr, A. Weierstall, M. Weilhammer, P. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormser, G. Woschnagg, K. Yip, K. Yushchenko, O. Zach, F. Zacharatou, C. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: The decay B*→Bγ has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays. The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B*-B mass difference of 45.5±0.3 (stat.) ±0.8 (syst.) MeV/c2. 95% confidence level upper limits at 6 MeV/c2 are placed on both the isospin (i.e. B+-B0) and the Bs-Bud splitting of the mass difference. The production ratio of B* to B mesons in Z decays is measured to be 0.72±0.03 (stat.) ±0.06 (syst.). Limits on the production cross-section of other hypothetical excited B hadron states decaying radiatively are established. The differential B* cross section has been measured to be in good agreement with the average b fragmentation, yielding an average fractional B* energy of 〈xE〉=0.695±0.009 (stat.) ±0.013 (syst.). From the decay angular distribution the relative contribution of longitudinal B* polarisation states is measured to be σL/(σL + σT) = 0.32 ± 0.04 (stat.) ±0.03 (syst.). © 1995 Springer-Verlag.
Published: 1995

49. OBSERVATION OF SHORT-RANGE 3-PARTICLE CORRELATIONS IN E(+)E(-) ANNIHILATIONS AT LEP ENERGIES

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML and ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BENVENUTI, AC and BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS and BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A and CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V and CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P and CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHIERICI, R and CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F and CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, WE and DEFOIX, C RICCA, GD DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L and DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J and DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M and ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E and FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GELE, D GERBER, JP GIBBS, M GILLESPIE, D and GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G GUNNARSSON, P and GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS and HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HUET, K and HULTQVIST, K IOANNOU, P JACKSON, JN JACOBSSON, R and JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C and JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATARGIN, A KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B and KOKKINIAS, P KORATZINOS, M KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C and KROLIKOWSKI, J KRONKVIST, I KRUMSTEIN, Z KRUPINSKI, W and KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW and LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM and LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L and MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC and MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C and MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEDBO, J MERONI, C MEYER, WT MIAGKOV, A MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G and NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S and NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS and NIEUWENHUIZEN, M NIKOLAENKO, V NISS, P NOMEROTSKI, A and NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG and ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD and PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M and PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F and PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P and PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S and RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M and REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB and RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J and RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H and SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC and SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N and SMIRNOVA, O SMITH, GR SOKOLOV, A SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K and STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B and SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TOET, DZ and TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C and TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O VALENTI, G and VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P and VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V and WAHLEN, H WALCK, C WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M and WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M and WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R and ZUCCHELLI, GC ZUMERLE, G
Subjects: High Energy Physics::Experiment
Abstract: Measurements are presented of short range three-particle correlations in e(+)e(-) annihilations at LEP using data collected by the DELPHI detector. At small values of the four-momentum difference, strong three-particle correlations are observed for like-sign (+++ and —) and for unlike-sign (++- and +–) pion combinations which are not a consequence of two-particle correlations. A possible explanation of the observed effects in like-sign combinations is the existence of higher order Bose-Einstein interference, which significantly changes the particle distributions in jets.
Published: 1995

50. Lifetime and production rate of beauty baryons from Z decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Allport, P.P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Amato, S. Andreazza, A. Andrieux, M.L. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Baudot, J. Becks, K.H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bigi, M. Bilenky, M.S. Billoir, P. Bloch, D. Blume, M. Blyth, S. Bocci, V. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Bosio, C. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brillault, L. Brown, R.C.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buys, A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Canepa, M. Cankocak, K. Cao, F. Carena, F. Carrilho, P. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Cindro, V. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dahm, J. Dalmagne, B. Dam, M. Damgaard, G. Daum, A. Dauncey, P.D. Davenport, M. Da Silva, W. Defoix, C. Della Ricca, D. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Brabandere, S. De Clercq, C. De La Vaissiere, C. De Lotto, B. De Min, A. De Paula, L. De Saint-Jean, C. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Ehret, R. Eigen, G. Ekelof, T. Ekspong, G. Elsing, M. Engel, J.-P. Ershaidat, N. Erzen, B. Espirito Santo, M. Falk, E. Fassouliotis, D. Feindt, M. Fenyuk, A. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Formenti, F. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furstenau, H. Fuster, J. Galloni, A. Gamba, D. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gibbs, M. Gillespie, D. Gokieli, R. Golob, B. Gopal, G. Gorn, L. Gorski, M. Gracco, V. Graziani, E. Grosdidier, G. Gunnarsson, P. Gunther, M. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Hahn, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hao, W. Harris, F.J. Hedberg, V. Henriques, R. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Higon, E. Hilke, H.J. Hill, T.S. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Ioannou, P. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, L. Jonsson, P. Joram, C. Juillot, P. Kaiser, M. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krammer, M. Kreuter, C. Krolikowski, J. Kronkvist, I. Krumstein, Z. Krupinski, W. Kubinec, P. Kucewicz, W. Kurvinen, K. Lacasta, C. Laktineh, I. Lamblot, S. Lamsa, J.W. Lanceri, L. Lane, D.W. Langefeld, P. Lapin, V. Last, I. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Legan, C.K. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Liko, D. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez, J.M. Lopez-Fernandez, A. Lopez Aguera, M.A. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Maehlum, G. Maio, A. Malychev, V. Mandl, F. Marco, J. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Maron, T. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Medbo, J. Meroni, C. Meyer, W.T. Michelotto, M. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Navas, S. Negri, P. Nemecek, S. Neumann, W. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nieuwenhuizen, M. Nikolaenko, V. Niss, P. Nomerotski, A. Normand, A. Oberschulte-Beckmann, W. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganini, P. Paganoni, M. Pages, P. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Passeri, A. Pegoraro, M. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Piana, G. Pierre, F. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Prest, M. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Reale, M. Rebecchi, P. Redaelli, N.G. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, J. Ridky, J. Rinaudo, G. Ripp, I. Romero, A. Roncagliolo, I. Ronchese, P. Roos, L. Rosenberg, E.I. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Sedykh, Y. Segar, A.M. Seitz, A. Sekulin, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Sitar, B. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassov, T. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavitski, I. Stepaniak, K. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tavernet, J.P. Tchikilev, O. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tomaradze, A. Tome, B. Torassa, E. Tortora, L. Transtromer, G. Treille, D. Trischuk, W. Tristram, G. Trombini, A. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eldik, J. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vrba, V. Wahlen, H. Walck, C. Wehr, A. Weierstall, M. Weilhammer, P. Wetherell, A.M. Wicke, D. Wickens, J.H. Wielers, M. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormser, G. Woschnagg, K. Yip, K. Zach, F. Zacharatou, C. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zito, M. Zontar, D. Zuberi, R. Zucchelli, G.C. Zumerle, G.
Subjects: Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment
Abstract: The production and decay of beauty baryons (b-baryons) have been studied using 1.7×106 Z hadronic decays collected by the DELPHI detector at LEP. Three different techniques were used to identify the b-baryons. The first method used pairs of a Λ and a lepton to tag the b-baryon decay. The second method associated fully reconstructed ΛC baryons with leptons. The third analysis reconstructed the b-baryon decay points by forming secondary vertices from identified protons and muons of opposite sign. Using these methods the following production rates were measured:[Figure not available: see fulltext.] The average b-baryon lifetime was determined to be:[Figure not available: see fulltext.] © 1995 Springer-Verlag.
Published: 1995

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