33 results on '"N Russakovich"'
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2. A study of the centrally produced π0π0π0 channel in pp interactions at 450 GeV/c
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D. Barberis, F.G. Binon, F.E. Close, K.M. Danielsen, S.V. Donskov, B.C. Earl, D. Evands, B.R. French, T. Hino, S. Inaba, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, J.B. Kinson, A. Kirk, A.A. Kondashov, A.A. Lednev, V. Lenti, I. Minashvili, J.P. Peigneux, V. Romanovsky, N. Russakovich, A. Semionov, P.M. Shagin, H. Shimizu, A.V. Shingovsky, A. Sobol, M. Stassinaki, J.P. Stroot, K. Takamatsu, T. Tsuru, O. Villalobos Baillie, M.F. Votruba, Y. Yasu, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), WA102, and BOMBAR, Claudine
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Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,FOS: Physical sciences ,01 natural sciences ,Omega ,High Energy Physics - Experiment ,3. Good health ,High Energy Physics - Experiment (hep-ex) ,Effective mass (solid-state physics) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010306 general physics ,Particle Physics - Experiment - Abstract
The reaction pp -> pf (pi0pi0pi0) ps has been studied at 450 GeV/c. The pi0pi0pi0 effective mass spectrum shows clear eta(547) and pi2(1670) signals. Branching ratios for the eta(547) and pi_2(1670) are given as well as upper limits for the decays of the omega(782), a1(1260) and a2(1320) into 3pi0., 10 pages, Latex, 4 Figures
- Published
- 2001
3. A study of the ηη′ and η′η′ channels produced in central pp interactions at 450 GeV/c
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, and Y Yasu
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Physics ,Nuclear and High Energy Physics ,Particle physics - Abstract
The reactions pp -> pf (X0) ps, where X0 is observed decaying to eta etaprime and etaprime etaprime, have been studied at 450 GeV/c. This is the first time that these channels have been observed in central production and only the second time that the etaprime etaprime channel has been observed in any production mechanism. In the eta etaprime channel there is evidence for the f0(1500) and a peak at 1.95 GeV. The etaprime etaprime channel shows a peak at threshold which is compatible with having JPC = 2++ and spin projection JZ = 0.
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- 2000
4. A partial wave analysis of the centrally produced π0π0 system in pp interactions at 450 GeV/c
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T. Hino, Kunio Takamatsu, V.N. Kolosov, Sergey Donskov, Irakli Minashvili, Petr P.M. Shagin, Sergey S.A. Polovnikov, Paolo Martinengo, K. M. Danielsen, G.V. Khaustov, A. Solovjev, Jean Pierre Peigneux, Takemi Nakagawa, A.V. Dolgopolov, M. Venables, B.C. Earl, Yoshiji Yasu, D. Barberis, Susumu Inaba, A. Semenov, V.D. Samoylenko, T. Jacobsen, R. Sené, G. Tchlatchidze, A.M. Blick, V.A. Polyakov, A. A. Kondashov, A. Kirk, Alexandre A.V. Inyakin, M.F. Votruba, W. Klempt, Freddy Binon, A. Sobol, G. T. Jones, S. Maljukov, N. Russakovich, A.V. Singovsky, Andrey Lednev, M. Stassinaki, A. Jacholkowski, Valentine Sugonyaev, K.L. Norman, H. M. Shimizu, J.B. Kinson, T. Ishida, David H. Evans, B. R. French, F.E. Close, W. Beusch, V. Romanovsky, M. Sené, Tsuneaki Tsuru, T. Kinashi, H. Rotscheidt, Jean-Pierre Stroot, O. Villalobos Baillie, V. Rumyantsev, and V. Lenti
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Physics ,Nuclear physics ,Momentum ,Nuclear and High Energy Physics ,Partial wave analysis ,Incident beam ,Channel (broadcasting) ,Atomic physics ,Central region - Abstract
A partial wave analysis of the centrally produced π 0 π 0 channel has been performed in pp collisions using an incident beam momentum of 450 GeV/c. An unambiguous physical solution has been found. Evidence is found for the f 0 (980), f 0 (1300) and f 0 (1500) in the the S -wave. and the f 2 (1270) is observed dominantly in the D 0 − -wave. In addition, there is evidence for a broad enhancement in the D -wave below 1 GeV.
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- 1999
5. A study of the centrally produced K(892)(892)and φω systems in pp interactions at 450 GeV/c
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, Jones G.T, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, T. Nakagawa, K.L. Norman, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
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Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Pomeron ,Near threshold ,Particle physics ,Glueball ,Mass spectrum ,State (functional analysis) ,Omega - Abstract
A study of the reactions pp -> pfps(K+K-pi+pi-) and pp -> pfps(K+K-pi+pi-pi0) shows evidence for the K*K* and phi omega channels respectively. The K*K* mass spectrum shows a broad distribution with a maximum near threshold and an angular analysis shows that it is compatible with having JP = 2+. The behaviour of the cross-section as a function of centre of mass energy, and the four momentum transfer dependence, are compatible with what would be expected if the K*K* system was produced via double Pomeron exchange. The dPT behaviour of the phi omega channel is similar to what has been observed for all the undisputed qqbar states. In contrast, the dPT behaviour of the K*K* final state is similar to what has been observed for the phi phi final state and for previously observed glueball candidates.
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- 1998
6. A study of pseudoscalar states produced centrally in pp interactions at 450 GeV/c
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.T. Jones, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, K. Myklebost, T. Nakagawa, K.L. Norman, J.M. Olsen, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,High Energy Physics - Experiment ,Pseudoscalar ,High Energy Physics - Experiment (hep-ex) ,Cross section (physics) ,Pomeron ,High Energy Physics::Experiment ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
A study has been made of pseudoscalar mesons produced centrally in pp interactions. The results show that the eta and etaprime appear to have a similar production mechanism which differs from that of the pi0. The production properties of the eta and etaprime are not consistent with what is expected from double Pomeron exchange. In addition the production mechanism for the eta and etaprime is such that the production cross section are greatest when the azimuthal angle between the pT vectors of the two protons is 90 degrees., 11 pages, Latex, 3 Figures
- Published
- 1998
7. A study of the centrally produced π+π−π0channel in pp interactions at 450 GeV/c
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, K. Myklebost, T. Nakagawa, K.L. Norman, J.M. Olsen, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, Yu.D. Prokoshkin, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, G. Vassiliadis, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Omega ,Particle Physics - Experiment ,Spin-½ - Abstract
The reaction pp -> pf (pi+pi-pi0) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. The analysis confirms the previous observation that all undisputed qqbar states are suppressed at small dPT. In addition, a clear difference is observed in the production mechanism for the eta and omega. The reaction pp → p f ( π + π − π 0 ) p s has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dP T filter applied. The analysis confirms the previous observation that all undisputed q q states are suppressed at small dP T . In addition, a clear difference is observed in the production mechanism for the η and ω . The reaction pp -> pf (pi+pi-pi0) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. The analysis confirms the previous observation that all undisputed qqbar states are suppressed at small dPT. In addition, a clear difference is observed in the production mechanism for the eta and omega.
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- 1998
8. Confirmation of a soft photon signal in excess of Q.E.D. expectations in π−p interactions at 280 GeV/c
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A. Belogianni, W. Beusch, T.J. Brodbeck, D. Evans, B.R. French, A. Jacholkowski, J.B. Kinson, A. Kirk, V. Lenti, R.A. Loconsole, V. Manzari, I. Minashvili, V. Perepelitsa, N. Russakovich, P. Sonderegger, M. Spyropoulou-Stassinaki, G. Tchlatchidze, G. Vassiliadis, I. Vichou, and O. Villalobos-Baillie
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Large Hadron Collider ,Photon ,Soft photon ,Spectrometer ,Physics::Instrumentation and Detectors ,Bremsstrahlung ,FOS: Physical sciences ,Omega ,Signal ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Pi ,High Energy Physics::Experiment ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
Photons produced in pi p interactions at 280 GeV/c were detected by reconstructing the e+e- pairs produced via the materialisation of the photons in a 1 mm thick lead sheet placed in front of the MWPCs of the OMEGA spectrometer at CERN. A soft photon signal 7.8 +/- 1.5 times the Q.E.D. inner bremsstrahlung prediction was observed confirming the results of a previous experiment., 11 pages, Latex, 3 Figures plus layout figure
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- 1997
9. Features of pi-induced collective resonances in nuclei A semi-empirical model for collective nuclear resonances in the Delta energy region
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T. Blokhintseva, Andrea Bianconi, R. Garfagnini, V.A. Drozdov, M. Artoni, I. Gnesi, A. Kirilov, M. Corradini, F. Tosello, G. Piragino, B. Parsamyan, I. A. Belolaptikov, G.B. Pontecorvo, M. L. Colantoni, A. Grasso, V. I. Lyashenko, A. Moiseenko, S. Baginyan, E. Lodi Rizzini, V.A. Panyushkin, V.V. Ivanov, Vladimir Frolov, D. Panzieri, Yu.A. Batusov, M. Chiosso, N. Russakovich, Gianfranco Zosi, A.M. Rozhdestvensky, Enrico Scalas, A. Dem’yanov, N. Angelov, V. Grebenyuk, P. Batyuk, F. Balestra, L. Venturelli, M. Schepkin, A. Maggiora, and V M Kovalenko
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Elastic scattering ,Physics ,Nuclear and High Energy Physics ,PIONS ,K+ COLLISIONS ,Nuclear Theory ,Hadron ,Binding energy ,XE NUCLEI ,Nuclear structure ,Nuclear matter ,NARROW BARYON RESONANCE ,TOTAL CROSS-SECTIONS ,POSITIVE STRANGENESS ,SCATTERING ,HE-4 ,Excited state ,Nuclear fusion ,Atomic physics ,Nuclear Experiment ,Nucleon - Abstract
A semi-empirical model is presented for the excitation of collective nuclear resonances induced by pions on nuclei in the Δ(1232) energy region. The physical features of the collective states have been extracted according to the model by fitting data from a collection of resonant π-nucleus elastic scattering cross-sections. The contributions to the total binding energy and to the width of a collective state per each additional nucleon involved in the resonance have been extracted. The interaction between the collective resonances and the surrounding nuclear medium is discussed.
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- 2011
10. PION INDUCED REACTIONS ON (4)He IN THE Delta RESONANCE ENERGY REGION
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I. A. Belolaptikov, I. Gnesi, F. Tosello, Ivanov, P. Batyuk, F. Balestra, Frolov, Drozdov, L. Venturelli, G. Piragino, S. Baginyan, Panyushkin, M. Schepkin, A. Moiseenko, Kovalenko, Gianfranco Zosi, M. Artoni, R. Garfagnini, A. Grasso, D Panziera, A. Kirilov, M. Chiosso, M. Corradini, A. Maggiora, Andrea Bianconi, Grebenyuk, N. Russakovich, Yu Batusiv, A.M. Rozhdestvensky, A. Dem’yanov, N. Angelov, Lyashenko, T. Blokhintseva, Enrico Scalas, B. Parsamyan, G.B. Pontecorvo, E L Rizzini, and M. L. Colantoni
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Physics ,Nuclear and High Energy Physics ,Phase transition ,PAINUC experiment ,Photon ,pion resonances ,nuclear physics ,Collective state ,Astronomy and Astrophysics ,Nuclear matter ,Resonance (particle physics) ,Atomic and Molecular Physics, and Optics ,Nuclear physics ,Pion ,phase transition ,nuclear matter ,Collective resonance ,Atomic physics ,Excitation ,Energy (signal processing) - Abstract
The analysis of new data on π±4 He interaction at T π =106 MeV provided information on the in-medium modifications of the Δ resonance and revealed signatures of the excitation of a nuclear collective state. Evidences for a reaction channel with thermal emission of photons are also presented.
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- 2011
11. The ATLAS hadronic tile calorimeter: From construction toward-physics
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Ilias Efthymiopoulos, Jose Torres, Dan Pantea, J. Castelo, R. A. Richards, P. Rosnet, T. Le Compte, A. B. Fenyuk, Richard Teuscher, S. Maliukov, V. J. Guarino, Martine Bosman, Tomas Davidek, J A Valls, A. Antonaki, P. V.M. Da Silva, F. S. Merritt, Jemal Khubua, C. Cuenca, I. Satsunkevitch, J. Pina, T. R. Junk, Carlos Marques, J. Schlereth, F. Sarri, J. E. Pilcher, Petr Tas, Jiang Li, Pavel Starovoitov, M. Sosebee, T. Zenis, P. Shevtsov, Chiara Roda, S. O. Holmgren, F. Daudon, V. Batusov, Denis Oliveira Damazio, Hrachya Hakobyan, J.M.L. Amengual, C. Biscarat, O. Gildemeister, G. Blanchot, Vicente González, A. Henriques, S. Errede, Alexander Solodkov, R. Lefèvre, D. G. Underwood, V. M. Romanov, Iacopo Vivarelli, Fernando Marroquim, L. Pribyl, Andrew White, T. Del Prete, S. Binet, José Paulo Santos, Armen Vartapetian, V. Grabsky, Zdenek Dolezal, J. Silva, Y. A. Kurochkin, P. Roy, R. Downing, J. Budagov, A. Gupta, Evgeny Starchenko, J. Proudfoot, Milos Lokajicek, F. Podlyski, Serban Constantinescu, Carmen Maidantchik, M. Volpi, K.J. And, P. Krivkova, M.C. Sforza, Antonio Ferrer, Calin Alexa, M. Ramstedt, V. Rumiantsau, B. Di Girolamo, Dimitrios Fassouliotis, G. Schlager, Mark Oreglia, Amir Farbin, J. Poveda, P. Grenier, Vincenzo Cavasinni, A. Lupi, O. Norniella, A. S. Cerqueira, Carlos A. Iglesias, L. E. Price, R. J. Miller, D. Errede, Fukun Tang, Davide Costanzo, V. Giangiobbe, C. Guicheney, Michael Haney, C. Bohm, Sanda Dita, Francois Vazeille, Dominique Pallin, O. Solovianov, Vakhtang Tsulaia, A. Bogush, Michal Suk, Irene Vichou, P. Adragna, Stanislav Tokár, M. Lembesi, Nikos Giokaris, Lawrence Nodulman, V. Simaitis, Stanislav Nemecek, E. Mazzoni, Ph Gris, O. Salto, Rupert Leitner, Mario David, H. Sanders, Gerard Montarou, M.V. Castillo, A. Miagkov, Luiz Caloba, G. Reinmuth, A. Maio, M. Hurwitz, C. Ferdi, J. Huston, M. Crouau, A. N. Karyukhin, B. Sellden, C. Bromberg, F. Cogswell, Giulio Usai, Stefan Valkar, V. Giakoumopoulou, J. Klereborn, I. Fedorko, V. Boldea, Ivan Sykora, Polina Kuzhir, A. M. Zaitsev, Marzio Nessi, Ilya Korolkov, A. Dotti, E. Fullana, N. Russakovich, Francesco Spanò, K. J. Anderson, J. G. Saraiva, J. Pinhao, N. D. Topilin, L. Miralles, Vladimir Vinogradov, B. Salvachua, Enrique Sanchis, M. Liablin, D. Lambert, E. Higon, V. Gilewsky, X. Portell, V. Flaminio, Irakli Minashvili, Kaushik De, A. Zenine, A. N. Sissakian, L. P. Says, A. Onofre, V. Garde, F. Martin, A. Manousakis, A. Gomes, P. Bednar, Yu.F. Lomakin, M. J. Shochet, Claudio Santoni, David Calvet, Jiri Dolejsi, João Carvalho, R. Chadelas, Yuri Kulchitsky, R. Stanek, Joao Seixas, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and ATLAS
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Nuclear and High Energy Physics ,Physics::Instrumentation and Detectors ,Monte Carlo method ,02 engineering and technology ,Calorimetry ,Jet (particle physics) ,01 natural sciences ,Nuclear physics ,Atlas (anatomy) ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Calibration ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Point (geometry) ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Electrical and Electronic Engineering ,Aerospace engineering ,Physics ,010308 nuclear & particles physics ,business.industry ,020206 networking & telecommunications ,Calorimeter ,medicine.anatomical_structure ,Nuclear Energy and Engineering ,visual_art ,visual_art.visual_art_medium ,High Energy Physics::Experiment ,Tile ,business - Abstract
ATLAS; The Tile Calorimeter, which constitutes the central section of the ATLAS hadronic calorimeter, is a non-compensating sampling device made of iron and scintillating tiles. The construction phase of the calorimeter is nearly complete, and most of the effort now is directed toward the final assembly and commissioning in the underground experimental hall. The layout of the calorimeter and the tasks carried out during construction are described, first with a brief reminder of the requirements that drove the calorimeter design. During the last few years a comprehensive test-beam program has been followed in order to establish the calorimeter electromagnetic energy scale, to study its uniformity, and to compare real data to Monte Carlo simulation. The test-beam setup and first results from the data are described. During the test-beam period in 2004, lasting several months, data have been acquired with a complete slice of the central ATLAS calorimeter. The data collected in the test-beam are crucial in order to study algorithms for hadronic energy reconstruction using single particles. The generalization of these algorithms to reconstruct jet energies will be the starting point for numerous physics studies in which jets play a leading role. The results obtained in applying these algorithms to simulated di-jet events are given in the last section of the note.
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- 2006
12. Spin physics with antiprotons
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M. Maggiora, V. Abazov, G. Alexeev, M. Alexeev, A. Amoroso, N. Angelov, S. Baginyan, F. Balestra, V. A. Baranov, Yu. Batusov, I. Belolaptikov, R. Bertini, A. Bianconi, R. Birsa, T. Blokhintseva, A. Bonyushkina, F. Bradamante, A. Bressan, M. P. Bussa, V. Butenko, M. Colantoni, M. Corradini, S. Dalla Torre, A. Demyanov, O. Denisov, V. Drozdov, J. Dupák, G. Erusalimtsev, L. Fava, A. Ferrero, L. Ferrero, M. Finger, V. Frolov, R. Garfagnini, M. Giorgi, V. A. Kalinnikov, Yu. Kharzheev, N. V. Khomutov, A. Kirilov, Yu. Kisselev, E. Komissarov, A. S. Korenchenko, A. Kotzinian, V. Kovalenko, N. P. Kravchuk, N. A. Kuchinski, E. Lodi Rizzini, V. Lyashenko, A. Maggiora, V. Malyshev, A. Martin, Yu. Merekov, A. S. Moiseenko, A. Olchevski, V. Panyushkin, D. Panzieri, G. Piragino, G. B. Pontecorvo, A. Popov, S. Porokhovoy, V. Pryanichnikov, M. Radici, M. P. Rekalo, A. Rozhdestvensky, N. Russakovich, P. Schiavon, O. Shevchenko, A. Shishkin, V. A. Sidorkin, N. Skachkov, M. Slunecka, A. Srnka, V. Tchalyshev, F. Tessarotto, E. Tomasi-Gustafsson, F. Tosello, E. P. Velicheva, L. Venturelli, L. Vertogradov, M. Virius, G. Zosi, and N. Zurlo
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Physics ,Particle physics ,High Energy Physics::Phenomenology ,Nuclear Theory ,Hyperon ,FOS: Physical sciences ,General Physics and Astronomy ,Parton ,Function (mathematics) ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Distribution function ,Antiproton ,High Energy Physics::Experiment ,Open charm ,Nucleon ,Spin (physics) ,Nuclear Experiment - Abstract
New possibilities arising from the availability at GSI of antiproton beams, possibly polarised, are discussed. The investigation of the nucleon structure can be boosted by accessing in Drell-Yan processes experimental asymmetries related to cross-sections in which the parton distribution functions (PDF) only appear, without any contribution from fragmentation functions; such processes are not affected by the chiral suppression of the transversity function $h_1(x)$. Spin asymmetries in hyperon production and Single Spin Asymmetries are discussed as well, together with further items like electric and magnetic nucleonic form factors and open charm production. Counting rates estimations are provided for each physical case. The sketch of a possible experimental apparatus is proposed., Presented for the proceedings of ASI "Spin and Symmetry", Prague, July 5-10, 2004, to be published in Czech. J. Phys. 55 (2005)
- Published
- 2005
13. A study of the centrally produced eta pi0 and eta pi- systems in pp interactions at 450 GeV/c
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D. Barberis, F.G. Binon, F.E. Close, K.M. Danielsen, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, J.B. Kinson, A. Kirk, A.A. Kondashov, V.N. Kolosov, A.A. Lednev, V. Lenti, I. Minashvili, J.P. Peigneux, V. Romanovsky, N. Russakovich, A. Semenov, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, M. Stassinaki, J.P. Stroot, K. Takamatsu, T. Tsuru, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
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Momentum ,Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics - Experiment (hep-ex) ,Partial wave analysis ,Pi ,Incident beam ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
A partial wave analysis of the centrally produced eta pi0 and eta pi- channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. Clear a0(980) and a2(1320) signals have been observed in S and D+ waves respectively. The dPT, phi and |t| distributions of these resonances are presented., 13 pages, Latex, 4 Figures
- Published
- 2000
14. A study of the $\eta\eta$ channel produced in central pp interactions at 450 GeV/c
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David H. Evans, V. Romanovsky, B. R. French, S. Inaba, Freddy Binon, B.C. Earl, F.E. Close, A. Semenov, T. Jacobsen, A. Sobol, T. Tsuru, D. Barberis, T. Hino, Jean-Pierre Stroot, Petr P.M. Shagin, A. Jacholkowski, Irakli Minashvili, A.A. Lednev, Yoshiji Yasu, K. M. Danielsen, A. Kirk, O. Villalobos Baillie, G.V. Khaustov, A. A. Kondashov, Jean Pierre Peigneux, H. M. Shimizu, J.B. Kinson, K. Takamatsu, M.F. Votruba, V. Lenti, Sergey Donskov, M. Stassinaki, N. Russakovich, A.V. Singovsky, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), WA102, and BOMBAR, Claudine
- Subjects
Physics ,Nuclear and High Energy Physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,Glueball ,Partial wave analysis ,SEARCH ENGINE RANKING ,FOS: Physical sciences ,RELEVANCE RANKING ,01 natural sciences ,Central region ,Omega ,Projection (linear algebra) ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,LINK POPULARITY ,010306 general physics ,Nuclear Experiment ,Particle Physics - Experiment ,Spin-½ - Abstract
The reaction pp -> pf (eta eta) ps has been studied at 450 GeV/c. For the first time a partial wave analysis of the centrally produced eta eta system has been performed. Signals for the f0(1500), f0(1710) and f2(2150) are observed and the decay branching fractions of these states are determined., 14 pages, Latex, 5 Figures
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- 2000
15. A spin analysis of the $4\pi$ channels produced in central pp interactions at 450 GeV/c
- Author
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, Y Yasu, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), WA102, and BOMBAR, Claudine
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,Systemic ,FOS: Physical sciences ,Resonance ,01 natural sciences ,High Energy Physics - Experiment ,Academic Library ,3. Good health ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Pi ,Atomic physics ,010306 general physics ,Spin (physics) ,Strategic Management ,Particle Physics - Experiment ,Constructivist methodology - Abstract
The reactions pp -> pf (X0) ps, where X0 is observed decaying to pi0pi0pi0pi0, pi+pi-pi0pi0 and pi+pi-pi+pi-, have been studied at 450 GeV/c. There is evidence for an a2(1320)pi decay mode of the eta2(1645) and eta2(1870) in the pi+pi-pi0pi0 and pi+pi-pi+pi- final states. The f2(1950) is consistent with being a single resonance with a dominant f2(1270)pipi decay mode. The f0(1370) is found to decay dominantly to rho-rho while the f0(1500) is found to decay to rho-rho and sigma-sigma., 14 pages, Latex, 4 Figures
- Published
- 2000
16. A search for charmonium states produced in central pp interactions at 450 GeV/c
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, Y Yasu, BOMBAR, Claudine, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and WA102
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Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,FOS: Physical sciences ,01 natural sciences ,High Energy Physics - Experiment ,3. Good health ,Cross section (physics) ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Limit (mathematics) ,010306 general physics ,Particle Physics - Experiment - Abstract
A search for centrally produced charmonium states has been presented. There is no significant evidence for any charmonium production. An upper limit of 2 nb is found for the cross section of chic production using the decay chic(1P)-> J/psi gamma., 10 pages, Latex, 4 Figures
- Published
- 2000
17. A study of the f0(1370), f0(1500), f0(2000) and f2(1950) observed in the centrally produced 4pi final states
- Author
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, and Y Yasu
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics - Experiment (hep-ex) ,FOS: Physical sciences ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
The production and decay properties of the f0(1370), f0(1500), f0(2000) and f2(1950) have been studied in central pp interactions at 450 GeV/c. The dPT, phi and |t| distributions of these resonances are presented. For the J = 0 states, the f0(1370) and f0(2000) have similar dPT and phi dependences. These are different to the dPT and phi dependences of the f0(980), f0(1500) and f0(1710). For the J = 2 states the f2(1950) has different dependences to the f2(1270) and f2'(1520). This shows that the dPT and phi dependences are not just J phenomena., Comment: 14 pages, Latex, 4 Figures
- Published
- 2000
- Full Text
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18. A coupled channel analysis of the centrally produced K+K- and pi+pi- final states in pp interactions at 450 GeV/c
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D. Barberis, F.G. Binon, F.E. Close, K.M. Danielsen, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, J.B. Kinson, A. Kirk, A.A. Kondashov, A.A. Lednev, V. Lenti, I. Minashvili, J.P. Peigneux, V. Romanovsky, N. Russakovich, A. Semenov, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, M. Stassinaki, J.P. Stroot, K. Takamatsu, T. Tsuru, O. Villalobos Baillie, M.F. Votruba, Y. Yasu, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), WA102, and BOMBAR, Claudine
- Subjects
Terminological knowledge base ,Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Ontology ,010308 nuclear & particles physics ,FOS: Physical sciences ,Branching (polymer chemistry) ,01 natural sciences ,High Energy Physics - Experiment ,Momentum ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Cartoon film ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Pi ,Incident beam ,Channel analysis ,010306 general physics ,Particle Physics - Experiment ,Indexation ,Cinéma of animation - Abstract
A coupled channel analysis of the centrally produced K+K- and pi+pi- final states has been performed in pp collisions at an incident beam momentum of 450 GeV/c. The pole positions and branching ratios to pipi and KK of the f0(980), f0(1370), f0(1500) and f0(1710) have been determined. A systematic study of the production properties of all the resonances observed in the pi+pi- and K+K- channels has been performed., 16 pages, Latex, 5 Figures
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- 1999
19. A study of the centrally produced baryon-antibaryon systems in pp interactions at 450 GeV/c
- Author
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D Barberis, W Beusch, F.G Binon, A.M Blick, F.E Close, K.M Danielsen, A.V Dolgopolov, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A.V Inyakin, T Ishida, A Jacholkowski, T Jacobsen, G.T Jones, G.V Khaustov, T Kinashi, J.B Kinson, A Kirk, W Klempt, V Kolosov, A.A Kondashov, A.A Lednev, V Lenti, S Maljukov, P Martinengo, I Minashvili, T Nakagawa, K.L Norman, J.P Peigneux, S.A Polovnikov, V.A Polyakov, V Romanovsky, H Rotscheidt, V Rumyantsev, N Russakovich, V.D Samoylenko, A Semenov, M Sené, R Sené, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, A Solovjev, M Stassinaki, J.P Stroot, V.P Sugonyaev, K Takamatsu, G Tchlatchidze, T Tsuru, M Venables, O Villalobos Baillie, M.F Votruba, Y Yasu, BOMBAR, Claudine, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and WA102
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,Dynamics (mechanics) ,FOS: Physical sciences ,Lambda ,01 natural sciences ,High Energy Physics - Experiment ,Momentum ,Baryon ,Pomeron ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Incident beam ,Mass spectrum ,High Energy Physics::Experiment ,010306 general physics ,Particle Physics - Experiment - Abstract
A study of the centrally produced ppbar, ppbarpi, ppbarpipi and lambda lambda channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. No significant new structures are observed in the mass spectra, however, important new information on the production dynamics is obtained. A systematic study of the production properties of these systems has been performed and it is found that these systems are not produced dominantly by double Pomeron exchange., Comment: 13 pages, Latex, 4 Figures
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- 1999
20. A study of the etapipi channel produced in central pp interactions at 450 GeV/c
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, and Y Yasu
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics - Experiment (hep-ex) ,Pi ,FOS: Physical sciences ,Channel (broadcasting) ,Atomic physics ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
The reaction pp -> pf (eta pi pi) ps has been studied at 450 GeV/c. There is clear evidence for an a2(1320)pi decay mode of the eta2(1645) and eta2(1870). In addition, there is evidence for an a0(980)pi$ decay mode of both resonances and an f2(1270)eta decay mode of the eta2(1870). No evidence is found for a JPC = 2++ a2(1320)pi wave., 15 pages, Latex, 4 Figures Branching ratio a2pi /f2 eta corrected
- Published
- 1999
- Full Text
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21. A partial wave analysis of the centrally produced $ \pi^{+} \pi^{-}$ system in pp interactions at 450 GeV/c
- Author
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.T. Jones, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, T. Nakagawa, K.L. Norman, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Pi system ,Partial wave analysis ,FOS: Physical sciences ,High Energy Physics - Experiment ,Nuclear physics ,Momentum ,High Energy Physics - Experiment (hep-ex) ,Incident beam ,Pi ,Particle Physics - Experiment ,Communication channel - Abstract
A partial wave analysis of the centrally produced pi+pi- channel has been performed in pp collisions using an incident beam momentum of 450 GeV/c. An unambiguous physical solution has been found. Evidence is found for the f0(980), f0(1300), f0(1500) and fJ(1710) with J = 0 in the the S-wave. The rho(770) is observed dominantly in the P0-wave and the f2(1270) is observed dominantly in the D0-wave. In addition, there is evidence for a broad enhancement in the D-wave below 1 GeV., Comment: 12 pages, Latex, 4 Figures
- Published
- 1999
22. A partial wave analysis of the centrally produced $K^{+}K^{-}$ and $K^{0}_{S}K^{0}_{S}$ systems in pp interactions at 450 GeV/c and new information on the spin of the $f_{J}(1710)$
- Author
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.T. Jones, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, T. Nakagawa, K.L. Norman, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
- Subjects
Nuclear physics ,Momentum ,Physics ,High Energy Physics - Experiment (hep-ex) ,Nuclear and High Energy Physics ,Particle physics ,Partial wave analysis ,Incident beam ,FOS: Physical sciences ,Particle Physics - Experiment ,High Energy Physics - Experiment ,Spin-½ - Abstract
A partial wave analysis of the centrally produced K+K- and K0K0 channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. An unambiguous physical solution has been found in each channel. The striking feature is the observation of peaks in the S-wave corresponding to the f0(1500) and fJ(1710) with J = 0. The D-wave shows evidence for the f2(1270)/a2(1320), the f2(1525) and the f2(2150) but there is no evidence for a statistically significant contribution in the D-wave in the 1.7 GeV mass region., Comment: 15 pages, Latex, 5 Figures
- Published
- 1999
23. Experimental evidence for a vector-like behaviour of Pomeron exchange
- Author
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D Barberis, F.G Binon, F.E Close, K.M Danielsen, S.V Donskov, B.C Earl, D Evans, B.R French, T Hino, S Inaba, A Jacholkowski, T Jacobsen, G.V Khaustov, J.B Kinson, A Kirk, A.A Kondashov, A.A Lednev, V Lenti, I Minashvili, J.P Peigneux, V Romanovsky, N Russakovich, A Semenov, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, M Stassinaki, J.P Stroot, K Takamatsu, T Tsuru, O Villalobos Baillie, M.F Votruba, Y Yasu, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), WA102, and BOMBAR, Claudine
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Current (mathematics) ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,01 natural sciences ,High Energy Physics - Experiment ,Azimuth ,High Energy Physics - Experiment (hep-ex) ,Pomeron ,Distribution (mathematics) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,010306 general physics ,Particle Physics - Experiment ,Spin-½ - Abstract
Evidence is presented that the Pomeron act as a non-conserved vector current. A study has been made of the azimuthal angle phi, which is defined as the angle between the pT vectors of the two outgoing protons, in the reaction pp -> pp(X0) for those resonances (X0) which are compatible with being produced by double Pomeron exchange. These distributions have been compared with a model which describes the Pomeron as a non-conserved vector current and a qualitative agreement is found. In addition, when one of the particles exchanged is known to have spin 0, namely pi-Pomeron exchange, the phi distribution is flat., 13 pages, Latex, 4 Figures
- Published
- 1999
24. Measurement of the beauty production cross-section in 350 GeV/c $\pi^-$ -Cu interactions
- Author
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V. Flaminio, P. Martinengo, D. Barney, Domizia Orestano, A. De Santo, R. Santonico, P. Nechaeva, C. Salvo, N. Hummadi, Yu. Alexandrov, V. Casanova, K. Harrison, R. Gessaroli, Federico Antinori, G. Schuler, S. Maljukov, Dario Barberis, Leonardo Paolo Rossi, A. Frenkel, M. Adinolfi, J.G. McEwen, C. Bacci, P. Mazzanti, A. Kirk, J. P. Dufey, Alessandro Cardini, Corrado Angelini, D. Websdale, G. Ciapetti, J. Batten, A. Forino, G. Martellotti, A. Semenov, Giovanni Darbo, A. Solovjev, M. Weymann, A. Di Ciaccio, V. Ryzhov, B. R. French, C. Lazzeroni, Bianca Osculati, C. Gemme, P. Farthouat, M. Dameri, P. Musico, Ludovico Pontecorvo, R. Hurst, J. C. Lassalle, M. Torelli, M. Palutan, N. Russakovich, Claudio Bruschini, M. Verzocchi, Stefano Veneziano, Roberto Cardarelli, L. Malferrari, L. Zanello, Gianni Penso, Emilio Petrolo, A. Duane, H. Rotscheidt, Filippo Ceradini, C. Cianfarani, Chiara Roda, Irakli Minashvili, M. V. Zavertyaev, M. Passaseo, M. I. Adamovich, W. Beusch, A. Quareni, Aleandro Nisati, Francesco Lacava, Adamovich, M, Adinolfi, M, Alexandrov, Y, Angelini, C, Antinori, F, Bacci, C, Barberis, D, Barney, D, Batten, J, Beusch, W, Bruschini, C, Cardarelli, R, Cardini, A, Casanova, V, Ceradini, Filippo, Cianfarani, C, Ciapetti, G, Dameri, M, Darbo, G, De Santo, A, Di Ciaccio, A, Duane, A, Dufey, Jp, Farthouat, P, Flaminio, V, Forino, A, French, Br, Frenkel, A, Gemme, C, Gessaroli, R, Harrison, K, Hummadi, N, Hurst, R, Kirk, A, Lacava, F, Lassalle, Jc, Lazzeroni, C, Malferrari, L, Maljukov, S, Martellotti, G, Martinengo, P, Mazzanti, P, Mcewen, Jg, Minashvili, I, Musico, P, Nechaeva, P, Nisati, A, Orestano, Domizia, Osculati, B, Palutan, M, Passaseo, M, Penso, G, Petrolo, E, Pontecorvo, L, Quareni, A, Rotscheidt, H, Ryzhov, V, Roda, C, Rossi, L, Russakovich, N, Salvo, C, Santonico, R, Schuler, G, Semenov, A, Solovjev, A, Torelli, M, Veneziano, S, Verzocchi, M, Websdale, D, Weymann, M, Zanello, L, and Zavertyaev, M.
- Subjects
Nuclear physics ,Physics ,body regions ,Nuclear and High Energy Physics ,Cross section (physics) ,Particle physics ,media_common.quotation_subject ,Beauty ,Measure (physics) ,Production (computer science) ,Sample (graphics) ,Particle Physics - Experiment ,media_common - Abstract
Using a sample of $10^8$ triggered events, produced in $\pi^-$--$\,$Cu interactions at 350~GeV$/c$, we have identified 26 beauty events. The estimated background in this sample is $0.6 \pm 0.6$ events. From these data, assuming a linear A-dependence, we measure a beauty production cross-section integrated over all $x_F$ of $5.7 {+1.3 \atop -1.1}~{\mathrm {(stat.)}} {+0.6 \atop -0.5}~{\mathrm {(syst.)}}~$nb/N.
- Published
- 1998
25. A measurement of the branching fractions of the f1(1285) and f1(1420) produced in central pp interactions at 450 GeV/c
- Author
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.T Jones, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, T. Nakagawa, K.L. Norman, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, M. Venables, O. Villalobos Baillie, M.F. Votruba, Y. Yasu, BOMBAR, Claudine, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and WA102
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,FOS: Physical sciences ,Branching (polymer chemistry) ,01 natural sciences ,3. Good health ,High Energy Physics - Experiment ,Pomeron ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010306 general physics ,Particle Physics - Experiment - Abstract
A study of the f1(1285) and f1(1420) produced in central pp interactions has been performed. For the first time in a single experiment the branching fractions of both mesons in all major decay modes have been determined. Both the f1(1285) and f1(1420) are consistent with being produced by double Pomeron exchange., Comment: 15 pages, Latex, 5 Figures, submitted to Physics Letters B
- Published
- 1998
- Full Text
- View/download PDF
26. A study of the centrally produced $\phi \phi$ system in pp interactions at 450 GeV/c
- Author
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D Barberis, W Beusch, F.G Binon, A.M Blick, F.E Close, K.M Danielsen, A.V Dolgopolov, S.V Donskov, B.C Earl, D Evans, B.R French, C Goodwin, T Hino, S Inaba, A.V Inyakin, T Ishida, A Jacholkowski, T Jacobsen, G.T Jones, G.V Khaustov, T Kinashi, J.B Kinson, A Kirk, W Klempt, V Kolosov, A.A Kondashov, A.A Lednev, V Lenti, S Maljukov, P Martinengo, I Minashvili, K Myklebost, T Nakagawa, K.L Norman, J.M Olsen, J.P Peigneux, S.A Polovnikov, V.A Polyakov, V Romanovsky, H Rotscheidt, V Rumyantsev, N Russakovich, V.D Samoylenko, A Semenov, M Sené, R Sené, P.M Shagin, H Shimizu, A.V Singovsky, A Sobol, A Solovjev, M Stassinaki, J.P Stroot, V.P Sugonyaev, K Takamatsu, G Tchlatchidze, T Tsuru, M Venables, O Villalobos Baillie, M.F Votruba, and Y Yasu
- Subjects
Physics ,Nuclear and High Energy Physics ,Pomeron ,Particle physics ,High Energy Physics - Experiment (hep-ex) ,Glueball ,FOS: Physical sciences ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
The reaction pp to pfps(K+K-K+K-) in which the K+K-K+K- system is centrally produced has been studied at 450 GeV/c. Phi phi production has been found to dominate this reaction and is compatible with being produced by double Pomeron exchange. An angular analysis of the phi phi system favours JPC = 2++ and its dPT dependence is similar to that observed for glueball candidates., Comment: 11 pages, Latex, 4 Figures
- Published
- 1998
27. A study of the KKbarpi channel produced centrally in pp interactions at 450 GeV/c
- Author
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, K. Myklebost, T. Nakagawa, K.L. Norman, J.M. Olsen, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, Yu.D. Prokoshkin, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, G. Vassiliadis, M. Venables, O. Villalobos Baillie, M.F. Votruba, and Y. Yasu
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics - Experiment (hep-ex) ,Pi ,FOS: Physical sciences ,Parity (physics) ,High Energy Physics - Experiment - Abstract
Results are presented of an analysis of the reactions pp -> pf(k0k+pi-)ps and pp -> pf(K0K0pi0)ps at 450 GeV/c. Clear f1(1285) and f1(1420) signals are seen and a spin parity analysis shows that both have IG JPC=0+ 1++. The f1(1285) decays to a0(980)pi and the f1(1420) decays to K* Kbar. Both states have a similar dependence as a function of dPT consistent with what has been observed for other qqbar states. Evidence is also presented for a K*Kbar decay mode of the eta2(1620)., 13 pages, Latex, 4 Figures
- Published
- 1997
- Full Text
- View/download PDF
28. A study of the centrally-produced $\pi^+ \pi^- \pi^+ \pi^-$ channel in pp interactions at 450 GeV/c
- Author
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D. Barberis, W. Beusch, F.G. Binon, A.M. Blick, F.E. Close, K.M. Danielsen, A.V. Dolgopolov, S.V. Donskov, B.C. Earl, D. Evans, B.R. French, T. Hino, S. Inaba, A.V. Inyakin, T. Ishida, A. Jacholkowski, T. Jacobsen, G.V. Khaustov, T. Kinashi, J.B. Kinson, A. Kirk, W. Klempt, V. Kolosov, A.A. Kondashov, A.A. Lednev, V. Lenti, S. Maljukov, P. Martinengo, I. Minashvili, K. Myklebost, T. Nakagawa, K.L. Norman, J.M. Olsen, J.P. Peigneux, S.A. Polovnikov, V.A. Polyakov, Yu.D. Prokoshkin, V. Romanovsky, H. Rotscheidt, V. Rumyantsev, N. Russakovich, V.D. Samoylenko, A. Semenov, M. Sené, R. Sené, P.M. Shagin, H. Shimizu, A.V. Singovsky, A. Sobol, A. Solovjev, M. Stassinaki, J.P. Stroot, V.P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, G. Vassiliadis, M. Venables, O. Villalobos Baillie, M.F. Votruba, Y. Yasu, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), WA102, and Lantz, Simone
- Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,0103 physical sciences ,Scalar (mathematics) ,010306 general physics ,01 natural sciences ,Particle Physics - Experiment ,Spin-½ - Abstract
The reaction pp -> pf (pi+pi-pi+pi-) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. In addition to the well known f1(1285) there is evidence for two JPC=2-+ states called the eta2(1620) and eta2(1875) and a broad scalar called the f0(2000). The production of these states as a function of the dPT kinematical filter shows the behaviour expected for qqbar states. In contrast, there is evidence for two states at 1.45 GeV and at 1.9 GeV which do not show the behaviour observed for qqbar states. The reaction pp → p f ( π + π − π + π − ) p s has been studied at 450 GeV/c in an experiment designed to search for gl states. A spin analysis has been performed and the dP T filter applied. In addition to the well know f 1 (1285) there is evidence for two J PC = 2 −+ states called the η 2 (1620) and η 2 (1875) and a broad scalar called the f 0 (2000). The production of these states as a function of the dP T kinematical filter shows the behaviour expected for q q states. In contrast, there is evidence for two states at 1.45 GeV and at 1.9 GeV which do not show the behaviour observed for q q states. The reaction pp -> pf (pi+pi-pi+pi-) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. In addition to the well known f1(1285) there is evidence for two JPC=2-+ states called the eta2(1620) and eta2(1875) and a broad scalar called the f0(2000). The production of these states as a function of the dPT kinematical filter shows the behaviour expected for qqbar states. In contrast, there is evidence for two states at 1.45 GeV and at 1.9 GeV which do not show the behaviour observed for qqbar states.
- Published
- 1997
29. A kinematical selection of glueball candidates in central production
- Author
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O. Villalobos Baillie, V. Lenti, A.A. Kondashov, Yu.D. Prokoshkin, Sergey S.A. Polovnikov, Irakli Minashvili, A.V. Dolgopolov, Petr P.M. Shagin, A. Jacholkowski, A. Kirk, B.C. Earl, S. Maljukov, M. Sené, D. Barberis, V. Rumyantsev, A. Semenov, Valentine Sugonyaev, K. Myklebos, Sergey Donskov, Makoto Kobayashi, G.V. Khaustov, Yuri Kulchitsky, N. Russakovich, Yoshiji Yasu, David H. Evans, R. Sené, J. N. Carney, Susumu Inaba, Freddy Binon, A.V. Singovsky, H. Rotscheidt, S. A. Sadovsky, T. Nakagawa, Andrey Lednev, V.D. Samoylenko, W. Beusch, V. Romanovsky, V.A. Polyakov, G. Tchlatchidze, J.M. Olsen, Jean-Pierre Stroot, T. Kinashi, Alexandre A.V. Inyakin, T. Jacobsen, Paolo Martinengo, Jean Pierre Peigneux, M. Stassinaki, K. M. Danielsen, M. Venables, A. Solovjev, M.F. Votruba, W. Klempt, Tsuneaki Tsuru, F.E. Close, B. R. French, G. Vassiliadis, Kunio Takamatsu, K.L. Norman, H. M. Shimizu, and J.B. Kinson
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson production ,Meson ,Selection (relational algebra) ,Glueball ,High Energy Physics::Lattice ,Nuclear Theory ,High Energy Physics::Phenomenology ,Omega ,Nuclear physics ,Transverse momentum ,Production (computer science) ,High Energy Physics::Experiment ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
A study of central meson production as a function of the difference in transverse momentum ($dP_T$) of the exchanged particles shows that undisputed $q \overline q$ mesons are suppressed at small $dP_T$ whereas the glueball candidates are enhanced.
- Published
- 1996
30. WA92: a fixed target experiment to trigger on and identify beauty particle decays
- Author
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Roberto Cardarelli, P. Musico, Irakli Minashvili, Emilio Petrolo, M. V. Zavertyaev, D. Barney, C. Bacci, B. R. French, H. Rotscheidt, David Websdale, P. Farthouat, A. Kirk, G.J. Barber, M. I. Adamovich, A. Semenov, Leonardo Paolo Rossi, B. Osculati, V. Flaminio, A. Forino, Alessandro Cardini, A. Quareni, P. Martinengo, N. Russakovich, Claudio Bruschini, Aleandro Nisati, Yu. Alexandrov, A. Di Ciaccio, G. Ciapetti, A. Solovjev, M. Weymann, M. Torelli, Ludovico Pontecorvo, V. Ryzhov, G. Martellotti, R. Hurst, A. Duane, C. Gemme, Francesco Lacava, S. Maljukov, Domizia Orestano, K. Harrison, M. Dameri, L. Zanello, Filippo Ceradini, A. Frenkel, Dario Barberis, M. Adinolfi, V. Casanova, Stefano Veneziano, N. Hummadi, Gianni Penso, F. Vernocchi, R. Gessaroli, M. Passaseo, Federico Antinori, J.G. McEwen, W. Beusch, Chiara Roda, R. Santonico, P. Mazzanti, C. Lazzeroni, L. Malferrari, C. Salvo, P. Nechaeva, Giovanni Darbo, G. Schuler, J. Batten, C. Angelini, J. P. Dufey, J. C. Lassalle, M. Verzocchi, Adamovich, M, Adinolfi, M, Alexandrov, Y, Angelini, C, Antinori, F, Bacci, C, Barber, G, Barberis, D, Barney, D, Batten, J, Beusch, W, Bruschini, C, Cardarelli, R, Cardini, A, Casanova, V, Ceradini, Filippo, Ciapetti, G, Dameri, N, Darbo, G, Diciaccio, A, Duane, A, Dufey, Jp, Farthouat, P, Flaminio, V, Forino, A, French, Br, Frenkel, A, Gemme, C, Gessaroli, R, Harrison, K, Hummadi, N, Hurst, R, Kirk, A, Lacava, F, Lassalle, Jc, Lazzeroni, C, Malferrari, L, Maljukov, S, Martellotti, G, Martinengo, P, Mazzanti, P, Mcewen, Jg, Minashvili, I, Musico, P, Nechaeva, P, Nisati, A, Orestano, Domizia, Osculati, B, Passaseo, M, Penso, G, Petrolo, E, Pontecorvo, L, Quareni, A, Rotscheidt, H, Ryzhov, V, Roda, C, Rossi, L, Russakovich, N, Salvo, C, Santonico, R, Schuler, G, Semenov, A, Solovjev, A, Torelli, M, Veneziano, S, Vernocchi, F, Verzocchi, M, Websdale, D, Weymann, M, Zanello, L, and Zavertyaev, M.
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Large Hadron Collider ,Spectrometer ,Physics::Instrumentation and Detectors ,Hadron ,Tracking (particle physics) ,Charged particle ,Nuclear physics ,Particle ,High Energy Physics::Experiment ,Detectors and Experimental Techniques ,Impact parameter ,Nuclear Experiment ,Instrumentation ,Lepton - Abstract
We describe the detectors and trigger system used in the CERN WA92 experiment. The experiment was designed to study the production and decay of beauty particles from 350 GeV/$c\,$ $\,\pi^-$ interactions in copper and tungsten targets. Charged particle tracking is performed using the Omega spectrometer. Silicon microstrip detectors are used to provide precise tracking information in the region of the production and the decay of heavy-flavoured particles and to trigger on the resulting high impact parameter tracks. The precision of vertex reconstruction corresponds to $\pm 3.7\%$ of the mean B-decay proper lifetime. Lepton and high transverse momentum hadron signals are also used in the trigger, which accepts 29\% of B-decays and rejects 98\% of non-beauty interactions.
- Published
- 1996
31. SEARCH FOR THE DECAY D-0-]MU(+)MU(-)
- Author
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Francesco Lacava, R. Santonico, M. I. Adamovich, P. Mazzanti, J.G. McEwen, Giovanni Darbo, A. Quareni, Dario Barberis, Aleandro Nisati, Domizia Orestano, J. C. Lassalle, Bianca Osculati, A. Frenkel, Leonardo Paolo Rossi, Ludovico Pontecorvo, M. Passaseo, Claudia Gemme, M. Adinolfi, M. Cirilli, Gianni Penso, S. Maljukov, C. Lazzeroni, P. Nechaeva, V. Casanova, G. Schuler, J. P. Dufey, C. Bacci, G. Martellotti, L. Malferrari, Paolo Martinengo, Filippo Ceradini, R. Gessaroli, C. Cianfarani, A. Kirk, Yu. Alexandrov, M. Dameri, K. Harrison, B. R. French, D. Barney, Roberto Cardarelli, Chiara Roda, A. Di Ciaccio, V. Ryzhov, G. Ciapetti, C. Salvo, V. Flaminio, P. Farthouat, W. Beusch, Irakli Minashvili, A. Solovjev, M. Weymann, M. V. Zavertyaev, R. Hurst, Alessandro Cardini, J. Batten, M. Verzocchi, N. Russakovich, Claudio Bruschini, D. Websdale, A. Semenov, C. Angelini, Stefano Veneziano, Emilio Petrolo, H. Rotscheidt, A. Forino, L. Zanello, A. Duane, W. Jank, Adamovich, M, Adinolfi, M, Alexandrov, Y, Angelini, C, Bacci, C, Barberis, D, Barney, D, Batten, J, Beusch, W, Bruschini, C, Cardarelli, R, Cardini, A, Casanova, V, Ceradini, Filippo, Cianfarani, C, Ciapetti, G, Cirilli, M, Dameri, M, Darbo, G, Diciaccio, A, Duane, A, Dufey, Jp, Farthouat, P, Flaminio, V, Forino, A, French, Br, Frenkel, A, Gemme, C, Gessaroli, R, Harrison, K, Hurst, R, Jank, W, Kirk, A, Lacava, F, Lassalle, Jc, Lazzeroni, C, Malferrari, L, Maljukov, S, Martellotti, G, Martinengo, P, Mazzanti, P, Mcewen, Jg, Minashvili, I, Nechaeva, P, Nisati, A, Orestano, Domizia, Osculati, B, Passaseo, M, Penso, G, Petrolo, E, Pontecorvo, L, Quareni, A, Rotscheidt, H, Ryzhov, V, Roda, C, Rossi, L, Russakovich, N, Salvo, C, Santonico, R, Schuler, G, Semenov, A, Solovjev, A, Veneziano, S, Verzocchi, M, Websdale, D, Weymann, M, Zanello, L, and Zavertyaev, M.
- Subjects
Physics ,Nuclear and High Energy Physics ,Muon ,Spectrometer ,chemistry ,Branching fraction ,Analytical chemistry ,chemistry.chemical_element ,Beryllium ,Tungsten ,Atomic physics ,Copper ,Particle Physics - Experiment - Abstract
We have searched for the decay D 0 → μ + μ − among 1.25 × 10 5 μ + μ − pairs produced by 350 GeV/ c π − particles interacting in copper and tungsten targets. Using a high-resolution silicon-microstrip detector followed by a large-acceptance magnetic spectrometer and a muon filter we are able to discriminate between prompt and non-prompt muons and to measure dimuon masses. No candidate compatible with a D 0 → μ + μ − decay has been found, allowing us to set an upper limit on the branching fraction B( D 0 → μ + μ − ) of 7.6 × 10 −6 at the 90% confidence level.
- Published
- 1995
32. A measurement of the energy loss spectrum of 150 GeV muons in iron
- Author
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Ziad Ajaltouni, A. Henriques, Christian Bohm, G.-S. Muanza, C. Padilla, Yu A Kulchitskii, O. Borisov, P. Brette, S. Studenov, Yu.A. Budagov, J.P. Martins, Kerstin Jon-And, S. Errede, Tomas Davidek, B. Michel, V. Kolomoets, Petr Tas, M. Cavalli-Sforza, Andrew White, Milos Lokajicek, V.J. Simaitis, H. Wolters, G. Renzoni, L. E. Price, V.I. Klioukhine, Gerard Montarou, H. Hakopian, I. Liba, A. Vartapetian, Yu.A. Khokhlov, R. Downing, S. Tardell, N. Hill, F. Albiol, J.C. Chevaleyre, E. Blucher, S. Lami, K. J. Anderson, M. Gaspar, R. Stanek, Evgeny Starchenko, Rupert Leitner, A. Surkov, Lee Sawyer, A. Astvatsaturov, Edward May, M. Haney, E. K. Johansson, M. Kulagin, T. A. Fuess, Edmond L. Berger, James Proudfoot, Serban Constantinescu, S. Malyukov, I. Efthymiopoulos, F. S. Merritt, L. Miralles, J.J. Thaler, Marina Cobal, S. Berglund, G. Yarygin, V. M. Romanov, M. J. Shochet, Joao Seixas, N. Yamdagni, L. Caloba, V.A. Sidorov, Alexander Solodkov, F. Cogswell, Jiri Dolejsi, João Carvalho, A. Maio, Andrés Gómez, M. Kostrikov, B. Sellden, R. Arsenescu, V. Semenov, A. Onofre, V. Shchelchkov, I. Chirikov-Zorin, E. Mnatasakanian, T. Del Prete, Francois Vazeille, C. Angelini, Sten Hellman, S. Kakurin, P. Sonderegger, Vincenzo Cavasinni, V.B. Golubev, Irakli Minashvili, O. Gildemeister, B. Ronceux, D. L. Wagner, V. Autiero, N. Russakovich, Fukun Tang, Z. Trka, Imma Riu, Stanislav Nemecek, S. Magill, A. Bogush, Michal Suk, M. Crouau, J.J. Dugne, A. Alifanov, A. Shevtsov, Zdenek Dolezal, R. J. Miller, N. Bouhemaid, O. Pukhov, H. G. Evans, O. Lomakina, V. Rumyantsev, A. S. Turcot, K. Soustruznik, S. Dita, B. Di Girolamo, V. Grabskii, Dominique Pallin, M. Bosman, F. Marroquin, Yu. Protopopov, Luc Poggioli, R. A. Richards, B. Wicklund, A. Pereira, Elizabeth Gallas, J. W. Dawson, Stefan Valkar, A. Lebedev, A. Juste, V. Kovtun, V. V. Lapin, A. Ferrer, S. O. Holmgren, V. Senchishin, J. A. Perlas, F. Lomakin Yu, P.F. Honore, R. G. Wagner, António Amorim, V. Boldea, Victor Kukhtin, C. Lazzeroni, S. V. Kopikov, M. Zdrazil, R. W. Stephens, A. De Santo, S. Tokar, G. Reinmuth, Kaushik De, Marzio Nessi, P. Amaral, S. Vorozhtsov, A. N. Sissakian, V. Flaminio, J. Huston, A. N. Karyukhin, D. Pantea, Yu. Ivanyushenkov, H. Plothow-Besch, R. E. Blair, Maria Pilar Casado, R. Chadelas, H. Sanders, L. P. Says, C. Blaj, S. Poirot, C. Bromberg, S. Orteu, D. Errede, D. G. Underwood, F. Badaud, A. M. Zaitsev, N. D. Topilin, C. Yosef, F. Teubert, Davide Costanzo, Vladimir Vinogradov, Lawrence Nodulman, Mario David, M. Brossard, V. J. Guarino, V. Glagolev, E. Mazzoni, Jing Li, G. Chlachidze, M. Turcotte, F. Daudon, G. Karapetian, J. E. Pilcher, G. Blanchot, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and RD34
- Subjects
Physics ,Particle physics ,Muon ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,Spectrum (functional analysis) ,Bremsstrahlung ,Electron ,Quadratic Gauss sum ,01 natural sciences ,7. Clean energy ,Radiation length ,Nuclear physics ,0103 physical sciences ,Production (computer science) ,High Energy Physics::Experiment ,010306 general physics ,Nuclear Experiment ,Energy (signal processing) ,Particle Physics - Experiment - Abstract
The energy loss spectrum of 150 GeV muons has been measured with a prototype of the ATLAS hadron calorimeter in the H8 beam of the CERN SPS. The differential probability ${\rm {d}}P/{\rm {d}}v$ per radiation length of a fractional energy loss $v = \Delta E_{\mu} / E_{\mu}$ has been measured in the range $v$ = 0.01 $\div$ 0.95; it is compared with the theoretical predictions for energy losses due to bremsstrahlung and production of electron-positron pairs or of energetic knock-on electrons. The integrated probability $\int_{0.01}^{0.95} ({\rm {d}}P/{\rm {d}}v) {\rm {d}}v$ is $(1.610\pm0.015_{{\rm {stat}}}\pm0.105_{{\rm {syst}}})\cdot10^{-3}$ in agreement with the theoretical predictions $1.556\cdot10^{-3}$ and $1.619\cdot10^{-3}$. Agreement with theory is also found in two intervals of $v$ where production of electron-positron pairs and knock-on electrons dominates. In the region of bremsstrahlung dominance ($v$ = 0.12 $\div$~0.95) the measured integrated probability $(1.160\pm0.040_{{\rm {stat}}}\pm0.075_{{\rm {syst}}})\cdot 10^{-4}$ is in agreement with the theoretical value of $1.185 \cdot 10^{-4} $, obtained using the Petrukhin and Shestakov description of the bremsstrahlung process. The same result is about 3.6 standard deviations (defined as the quadratic sum of statistical and systematic errors) lower than the theoretical prediction of $ 1.472\cdot 10^{-4}$, obtained using Tsai's description of bremsstrahlung.
33. Spin physics with antiprotons
- Author
-
Maggiora, M., Abazov, V., Alexeev, G., Alexeev, M., Amoroso, A., Angelov, N., Baginyan, S., Balestra, F., Baranov, V. A., Batusov, Y. u., Belolaptikov, I., Bertini, R., Bianconi, A., Birsa, Renato, Blokhintseva, T., Bonyushkina, A., Bradamante, Franco, Bressan, Andrea, Bussa, M. P., Butenko, V., Colantoni, M., Corradini, M., DALLA TORRE, Silvia, Demyanov, A., Denisov, O., Drozdov, V., Dupak, J., Erusalimtsev, G., Fava, L., Ferrero, A., Ferrero, L., Finger, M., J. r., Frolov, V., Garfagnini, R., Giorgi, Marcello, Gorchakov, O., Grasso, A., Grebenyuk, V., Ivanov, V., Kalinin, A., Kalinnikov, V. A., Kharzheev, Y. u., Kisselev, Y. u., Khomutov, N. V., Kirilov, A., Komissarov, E., Kotzinian, A., Korenchenko, A. S., Kovalenko, V., Kravchuk, N. P., Kuchinski, N. A., Lodi Rizzini, E., Lyashenko, V., Malyshev, V., Maggiora, A., Martin, Anna, Merekov, Y. u., Moiseenko, A. S., Olchevski, A., Panyushkin, V., Panzieri, D., Piragino, G., Pontecorvo, G. B., Popov, A., Porokhovoi, S., Pryanichnikov, V., Radici, M., Rekalo, M. P., Rozhdestvensky, A., Russakovich, N., Schiavon, Paolo, Shevchenko, O., Shishkin, A., Sidorkin, V. A., Skachkov, N., Slunecka, M., Sosio, S., Srnka, A., Tchalyshev, V., Tessarotto, F., Tomasi, E., Tosello, F., Velicheva, E. P., Venturelli, L., Vertogradov, L., Virius, M., Zosi, G., Zurlo, N., M., Maggiora, V., Abazov, G., Alexeev, M., Alexeev, A., Amoroso, N., Angelov, S., Baginyan, F., Balestra, V. A., Baranov, Batusov, Y. u., I., Belolaptikov, R., Bertini, A., Bianconi, Birsa, Renato, T., Blokhintseva, A., Bonyushkina, Bradamante, Franco, Bressan, Andrea, M. P., Bussa, V., Butenko, M., Colantoni, M., Corradini, DALLA TORRE, Silvia, A., Demyanov, O., Denisov, V., Drozdov, J., Dupak, G., Erusalimtsev, L., Fava, A., Ferrero, L., Ferrero, M., Finger, J., R., V., Frolov, R., Garfagnini, Giorgi, Marcello, O., Gorchakov, A., Grasso, V., Grebenyuk, V., Ivanov, A., Kalinin, V. A., Kalinnikov, Kharzheev, Y. u., Kisselev, Y. u., N. V., Khomutov, A., Kirilov, E., Komissarov, A., Kotzinian, A. S., Korenchenko, V., Kovalenko, N. P., Kravchuk, N. A., Kuchinski, E., Lodi Rizzini, V., Lyashenko, V., Malyshev, A., Maggiora, Martin, Anna, Merekov, Y. u., A. S., Moiseenko, A., Olchevski, V., Panyushkin, D., Panzieri, G., Piragino, G. B., Pontecorvo, A., Popov, S., Porokhovoi, V., Pryanichnikov, M., Radici, M. P., Rekalo, A., Rozhdestvensky, N., Russakovich, Schiavon, Paolo, O., Shevchenko, A., Shishkin, V. A., Sidorkin, N., Skachkov, M., Slunecka, S., Sosio, A., Srnka, V., Tchalyshev, F., Tessarotto, E., Tomasi, F., Tosello, E. P., Velicheva, L., Venturelli, L., Vertogradov, M., Viriu, G., Zosi, and N., Zurlo
- Subjects
Drell-Yan process ,p structure ,anti-p polarized beam ,Drell-Yan proce - Published
- 2005
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