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1. Hyperon production in proton-sulphur interaction at 200 GeV/c

Author

S. Abatzis, J. Ftáĉnik, V. Lenti, K. Knudson, P. Ladron de Guevara, J. Urban, N. Carrer, M. Venables, J. N. Carney, Domenico Elia, V. A. Katchanov, Federico Antinori, O. Villalobos Baillie, J. L. Narjoux, R. A. Ricci, A. V. Singovsky, A. C. Bayes, M. Morando, E. Andersen, G.F. Segato, L. Sandor, E. Quercigh, K. Šafařík, M. Sené, T.F. Thorsteinsen, A. Volte, Ph. Leruste, J. P. Davies, J. Bohm, R. Lietava, R. Sené, K.L. Norman, D. Di Bari, F. Pellegrini, Petr Zavada, K. Fanebust, Håvard Helstrup, A. Kirk, A. Jacholkowski, B. De La Cruz, W. Beusch, J.B. Kinson, G. Løvhøiden, B. Ghidini, G. Vassiliadis, J. Kahane, M. Benayoun, F. Navach, A.K. Holme, Alberto Andrighetto, M.F. Votruba, David H. Evans, V. Manzari, R. A. Loconsole, R. Fini, J. C. Lassalle, B. R. French, Ivan Kralik, and P. Sennels

Subjects
Physics, Nuclear and High Energy Physics, Strange quark, High Energy Physics::Phenomenology, Hyperon, General Physics and Astronomy, Elementary particle, Lambda baryon, Xi baryon, Nuclear physics, Baryon, Strange matter, Transverse mass, Nuclear Experiment
Abstract

The WA94 collaboration uses the production of strange and anti-strange particles to investigate the properties of hot hadronic matter created in heavy-ion interactions. Λ,\(\bar \Lambda \), Ξ− and\(\bar \Xi ^ + \) particle yields and transverse mass spectra are presented for pS interactions and are compared with those for SS interactions and for the pW and SW interactions of WA85.

Published
1996
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2. Strangeness production in p+W and S+W Interactions at 200 A GeV/c

Author

David H. Evans, B. R. French, Leonardo Paolo Rossi, T. Storås, R. A. Loconsole, J. C. Lassalle, W. Beusch, Ph. Leruste, M. Benayoun, F. Navach, A. Volte, R. P. Barnes, R. Sené, V. Lenti, J. L. Narjoux, M. Venables, B. Ghidini, K. Knudson, J. N. Carney, V. Manzari, Federico Antinori, R. Fini, A. C. Bayes, E. Quercigh, Håvard Helstrup, B. De La Cruz, G. Vassiliadis, J.A. Lien, A. Jacholkowski, M. Sené, K. Šafařík, S. Abatzis, A. Andrighetto, M.F. Votruba, O. Villalobos-Baillie, J. Kahane, J.B. Kinson, A.K. Holme, D. Evans, D. Di Bari, J. P. Dufey, A. Kirk, D. Elia, and J. P. Davies

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Strangeness production, Transverse mass, Heavy ion, Nuclear Experiment, Spectral line
Abstract

Strange and multistrange baryon and antibaryon production is a useful probe into the dynamics of the hot hadronic matter created in central heavy ion interactions. Relative production yields and transverse mass spectra are presented and compared for pW and SW interactions.

Published
1996
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3. Study of Kins0, Λ and Λ production in S-W collisions at 200 GeV/c per nucleon

Author

J. P. Dufey, A. Kirk, J.B. Kinson, D. Elia, A. Volte, R. Sené, R. P. Barnes, A.K. Holme, V. Lenti, K. Knudson, David H. Evans, J. N. Carney, J.A. Lien, A. C. Bayes, A. Andrighetto, A. Jacholkowski, J. P. Davies, S. Abatzis, B. Ghidini, Håvard Helstrup, B. De La Cruz, Karel Safarik, R. Fini, G. Vassiliadis, M.F. Votruba, W. Beusch, E. Quercigh, J. C. Lassalle, M. Benayoun, F. Navach, O. Villalobos Baillie, V. Manzari, D. Di Bari, R. A. Loconsole, Federico Antinori, Ph. Leruste, B. R. French, Leonardo Paolo Rossi, T. Storås, J. Kahane, M. Venables, J. L. Narjoux, and M. Sené

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Pion, Rapidity, Production (computer science), Nucleon, Spectral line
Abstract

Results on Ks0 production at central rapidity in sulphur-tungsten interactions are presented. The selection procedure used to identify Ks0 particles through their decay to two charged pions is described. The mT spectra for Ks0, Λ and Λ and the relative production rates K s 0 Λ and K s 0 Λ , calculated in the kinematic region pT > 1 GeV/c and 2.5 ≤ yLAB ≤ 3.0, are discussed.

Published
1996
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4. Study of charged particle production using Omega RICH in WA94 experiment

Author

B. R. French, W. Beusch, A. Volte, V. Lenti, R. Sené, M. Benayoun, Ivan Kralik, Petr Zavada, R. A. Loconsole, Ph. Leruste, M. Morando, N. Carrer, S. Abatzis, F. Pellegrini, T.F. Thorsteinsen, O. Villalobos Baillie, R. A. Ricci, Federico Antinori, J. L. Narjoux, E. Andersen, V. A. Katchanov, D. Di Bari, A. C. Bayes, J.B. Kinson, B. Ghidini, A. Jacholkowski, M. Sené, Alberto Andrighetto, Vito Manzari, A. Kirk, J. C. Lassalle, R. A. Fini, D. Elia, K. Fanebust, J. Kahane, A. V. Singovsky, David H. Evans, K. Knudson, P. Ladron de Guevara, G.F. Segato, F. Navach, R. P. Barnes, J. N. Carney, E. Quercigh, J. P. Davies, L. Sandor, Roman Lietava, A.K. Holme, J. Bohm, M. Venables, Jozef Urban, K. Šafařík, Håvard Helstrup, B. De La Cruz, G. Vassiliadis, G. Løvhøiden, and M.F. Votruba

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Tracking (particle physics), Omega, Charged particle, Particle identification, Particle detector, Nuclear physics, Particle, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Charged particle beam, Instrumentation
Abstract

We present preliminary results about charged particle production in SS collisions at 200 GeV/ c per nucleon, obtained by WA94 experiment at CERN-SPS. The particle identification has been provided by the Omega RICH; a silicon telescope and an array of multiwire proportional chambers (MWPC) have been used to track particles to the RICH detector. Details about particle tracking and identification procedure are also reported.

Published
1996
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5. Production of strange and multistrange hyperons and antihyperons in S-W interactions at 200 GeV/c per nucleon

Author

Leonardo Paolo Rossi, A. Kirk, D. Di Bari, Håvard Helstrup, B. De La Cruz, A. C. Bayes, A. Jacholkowski, S. Abatzis, R. A. Fini, O. Villalobos Baillie, G. Vassiliadis, Vito Manzari, J. P. Davies, David H. Evans, J. Kahane, V. Lenti, J. L. Narjoux, B. Ghidini, R. P. Barnes, K. Knudson, E. Quercigh, J. N. Carney, K. Šafařík, A. Volte, F. Navach, R. Sené, Federico Antinori, A. Andrighetto, W. Beusch, J.B. Kinson, M. Benayoun, M. Sené, M.F. Votruba, J. P. Dufey, R. A. Loconsole, D. Elia, B. R. French, Ph. Leruste, A.K. Holme, J. C. Lassalle, and T. Storås

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Hyperon, Spectral line, Nuclear physics, Baryon, Transverse mass, High Energy Physics::Experiment, Heavy ion, Nuclear Experiment, Nucleon
Abstract

Strange and multistrange baryon and antibaryon production is a useful probe into the dynamics of the hot hadronic matter created in central heavy ion interactions. Relative production yields and transverse mass spectra are presented for Λ, Λ, Ξ− and Ξ+ hyperons produced in central sulphur-tungsten interactions at 200 GeV/c per nucleon.

Published
1995
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6. Strange particle production in sulphur-sulphur interactions at 200 GeV/c per nucleon

Author

U. Mueller, Håvard Helstrup, B. De La Cruz, G. Vassiliadis, M. Morando, R. A. Loconsole, A.K. Holme, V. Manzari, K. Šafařík, A. V. Singovsky, M. Passaseo, R. Fini, A. Kirk, A. Jacholkowski, J. P. Dufey, J. C. Lassalle, V. A. Katchanov, G. Waelder, Jürgen Engelfried, Ph. Leruste, V. Lenti, K. Knudson, P. Ladron de Guevara, J. N. Carney, D. Elia, Jozef Urban, D. Di Bari, J. Kahane, K. Martens, I. J. Bloodworth, W. Beusch, J. L. Narjoux, A. Michalon, A. Bravar, M. Benayoun, F. Navach, J. Bohm, R. Sené, C. Voltolini, Alberto Andrighetto, G. Løvhøiden, G.F. Segato, E. Quercigh, G. Undheim, A. Volte, S. Abatzis, L. Šándor, F. Pellegrini, R. Blaes, Petr Zavada, B. Ghidini, J.B. Kinson, M. Sené, S. Clewer, David H. Evans, C.J. Dodenhoff, T.F. Thorsteinsen, O. Villalobos Baillie, R. A. Ricci, R. P. Barnes, A. C. Bayes, M.F. Votruba, H. W. Siebert, B. R. French, Federico Antinori, J. P. Davies, Aldo Penzo, T. Kachelhoffer, 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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), WA94, Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
Physics, Nuclear and High Energy Physics, Strange quark, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Plasma formation, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, chemistry.chemical_element, 01 natural sciences, Central region, Omega, Sulfur, Baryon, Nuclear physics, chemistry, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Transverse mass, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

Multi-strange baryon and anti-baryon production is expected to be a useful probe in the search for Quark-Gluon Plasma formation. We present the transverse mass distributions of negative particles, K o s, Λs, Λ s, and Ξ − s produced in sulphurtungsten interactions at 200 GeV/c per nucleon and give the corrected ratios Λ Λ, Ξ − Λ and Ξ − /Λ . We note that our ratio Ξ − / Λ appears large in comparison to that from p p interactions.

Published
1995
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7. Results on the production of baryons with |S| = 1, 2, 3 and strange mesons in S-W collisions at 200 GeV/c per nucleon

Author

T. Storås, Domenico Di Bari, A. C. Bayes, Federico Antinori, A. Jacholkowski, R. P. Barnes, J. P. Davies, V. Manzari, Leonardo Paolo Rossi, A. Kirk, E. Quercigh, B. R. French, K. Šafařík, A. Volte, R. Sené, O. Villalobos Baillie, J. Kahane, W. Beusch, A.K. Holme, B. Ghidini, A. Andrighetto, M. Benayoun, F. Navach, Håvard Helstrup, B. De La Cruz, J. L. Narjoux, R. Fini, G. Vassiliadis, J.B. Kinson, V. Lenti, K. Knudson, J. N. Carney, J. C. Lassalle, M. Sené, David H. Evans, D. Di Bari, M.F. Votruba, J. P. Dufey, D. Elia, S. Abatzis, and Ph. Leruste

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, Production (computer science), Rapidity, Strangeness, Nucleon
Abstract

We report results on the production of strange baryons/antibaryons with 1, 2, and 3 units of strangeness (Λ, Ξ and Ω) and mesons (K s 0 , K + and K − ) in WA85 experiment at the CERN SPS. This experiment was designed to study the production of strange particles in central SW collisions at 200 GeV/c per nucleon, in the central rapidity region with medium to high p t . We have measured the inverse slopes of the m t distributions of such particles and the production ratios Λ /Λ, Ξ + /Ξ − , Ξ − / Λ , Ξ + / Λ , K s 0 / Λ , K s 0 / Λ , (Ω − + Ω + ) (Ξ − + Ξ + ) and K + K − . Preliminary results on the production ratios Ξ − / Λ and Ξ + / Λ in pW collisions at 200 GeV/c are also presented.

Published
1995
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8. Observation of a narrow scalar meson at 1450 MeV in the reaction at 450 GeV/c using the CERN Omega spectrometer

Author

Irakli Minashvili, N.A. Russakovich, C. J. Dodenhoff, A. Solovjev, J. P. Davies, V. Lenti, G. Vassiliadis, D. Barberis, W. Beusch, V. Romanovsky, G. Tchlatchidze, R. A. Fini, R. Sené, A. Kirk, A. Semenov, Federico Antinori, D. Evans, Y. Kulchitsky, A. Jacholkowski, D. Di Bari, B. Ghidini, E. Quercigh, S. Clewer, I. Vichou, F. Navach, Maria Girone, B. R. French, J. N. Carney, R. A. Loconsole, M. Sené, S. Maljukov, M.F. Votruba, R. P. Barnes, A. C. Bayes, Vito Manzari, S. Abatzis, O. Villalobos Bailie, K.L. Norman, and J.B. Kinson

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Meson, Spectrometer, 010308 nuclear & particles physics, Elementary particle, 01 natural sciences, Omega, Nuclear physics, 0103 physical sciences, Mass spectrum, Pi, 010306 general physics, Scalar meson
Abstract

The reaction pp → pƒ(π + π − π + π − )p s has been studied at 450 GeV/c in an experiment designed to search for gluonic states. In addition to the well known ƒ 1 (1285) , the π+π−π+π− mass spectrum shows evidence for two states pre only observed by the WA76 experiment, the X(1450) and X(1900). An analysis of the X(1450) shows that it is a relatively narrow state (Γ = 56 ± 12 MeV) with I(JPC) = 0(0++) which decays to ϱ0π+π−. The X (1900) could either b single broad state (Γ = 370±70 MeV) with I(JPC) = 0(2++) or possibly separate states.

Published
1994
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9. Ω− signal in WA85

Author

J. P. Dufey, O. Villalobos Baillie, K. Knudson, J. N. Carney, D. Elia, Maria Girone, Leonardo Paolo Rossi, M.F. Votruba, B. De La Cruz, A. Jacholkowski, V. Lenti, S. Abatzis, A. Volte, Haavard Helstrup, J. Kahane, A. Kirk, W. Beusch, A. C. Bayes, R. Sené, A.K. Holme, B. Ghidini, M. Benayoun, Vito Manzari, R. P. Barnes, Ph Leruste, F. Navach, A. Bravar, K. Šafařík, Alberto Andrighetto, M. Sene, Federico Antinori, J. C. Lassalle, J.B. Kinson, A. Penzo, D. Di Bari, D. Evans, B. R. French, E. Quercigh, J. L. Narjoux, R. A. Fini, J. P. Davies, and G. Vassiliadis

Subjects
Physics, Nuclear and High Energy Physics, Particle decay, Branching fraction, Hadron, Analytical chemistry, Mass spectrum, Rapidity, Lambda baryon, Omega baryon, Xi baryon
Abstract

We have extracted from the full WA85 1990 data set a sample of 14ω − + ω − candidates. We describe the selection criteria, and give a measurement of the ω − /ω − ratio at central rapidity and PT > 1.6 GeV/c.

Published
1994
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10. Strange particle production in sulphur-sulphur interactions at 200 per nucleon

Author

C.J. Dodenhoff, J. C. Lassalle, S. Abatzis, V. Lenti, K. Martens, A. C. Bayes, Vito Manzari, G.F. Segato, F. Pellegrini, K. Šafařík, E. Quercigh, B. R. French, R. P. Barnes, A. Kirk, J.B. Kinson, A. V. Singovsky, M.F. Votruba, A. Volte, A.K. Holme, M. Passaseo, C. Voltolini, R. Sené, Aldo Penzo, R. A. Fini, Alberto Andrighetto, A. Michalon, O. Villalobos Baillie, R. A. Ricci, H. W. Siebert, G. Undheim, T.F. Thorsteinsen, L. Sandor, A. Jacholkowski, U. Mueller, Federico Antinori, Haavard Helstrup, R. Blaes, Petr Zavada, B. De La Cruz, S. Clewer, J. P. Dufey, D. Di Bari, D. Elia, I. J. Bloodworth, R. A. Loconsole, V. A. Katchanov, A. Bravar, J-L. Narjoux, David H. Evans, M. Morando, J. Kahane, G. Waelder, G. Vassiliadis, Gunnar Løvhøiden, Jürgen Engelfried, M. Sené, K. Knudson, P. Ladron de Guevara, J. N. Carney, J. Urban, J. Bohm, W. Beusch, M. Benayoun, B. Ghidini, F. Navach, Ph Leruste, J. P. Davies, and T. Kachelhoffer

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Strange quark, chemistry, chemistry.chemical_element, Nucleon, Sulfur
Published
1994
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11. New results from WA85 on multistrange hyperon production in 200 A S-W interactions

Author

Maria Girone, V. Lenti, Federico Antinori, D. Evans, J. P. Dufey, D. Elia, R. P. Barnes, D. Di Bari, W. Beusch, G. Vassiliadis, M. Benayoun, J. P. Davies, A. Volte, B. Ghidini, S. Abatzis, Haavard Helstrup, A.K. Holme, R. A. Fini, A. Bravar, B. de la Cruzy, Alberto Andrighetto, R. Sené, F. Navach, J. Kahane, M. Sene, A. C. Bayes, A. Kirk, E. Quercigh, J. C. Lassalle, Vito Manzari, A. Jacholkowski, B. R. French, M.F. Votruba, Leonardo Paolo Rossi, Karel Safarik, J.B. Kinson, A. Penzo, J. L. Narjoux, O. Villalobos Baillie, K. Knudson, Ph Leruste, and J. N. Carney

Subjects
Physics, Nuclear and High Energy Physics, Particle decay, Particle physics, Meson, Hadron, Hyperon, Lambda baryon, Omega baryon, Xi baryon, Boson
Published
1994
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12. Strange particle production in sulphur-tungsten interactions at 200 GEV/C per nucleon

Author

S. Abatzis, F. Antinori, R.P. Barnes, A.C. Bayes, M. Benayoun, W. Beusch, I.J. Bloodworth, A. Bravar, J.N. Carney, B. de la Cruz, D. Di Bari, J.P. Dufey, D. Evans, R. Fini, B.R. French, B. Ghidini, M. Girone, H. Helstrup, A.K. Holme, A. Jacholkowski, J. Kahane, J.B. Kinson, A. Kirk, K. Knudson, J.C. Lassalle, V. Lenti, Ph. Leruste, L.Lima Francês, R.A. Loconsole, A. Malamant, V. Manzari, F. Navach, J.L. Narjoux, A. Palano, A. Penzo, E. Quercigh, L. Rossi, K. Šafarik, M. Sené, R. Sené, M. Tamazouzt, M.T. Trainor, G. Vassiliadis, O.Villalobos Baillie, A. Volte, and M.F. Votruba

Subjects
Nuclear and High Energy Physics
Published
1992
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13. production in sulphur-tungsten interactions at 200 GeV/c per nucleon

Author

S. Abatzis, M.F. Votruba, K. Šafařík, A. Bravar, V. Lenti, K. Knudson, J. N. Carney, J. Kahane, I. J. Bloodworth, Federico Antinori, M. Tamazouzt, M. T. Trainor, V. Manzari, R. Fini, J.B. Kinson, A. Penzo, R. P. Barnes, M. Sené, A. Palano, J. C. Lassalle, A. Jacholkowski, A. Volte, B. De La Cruz, G. Vassiliadis, R. Sené, A. Kirk, J. P. Dufey, R. A. Loconsole, L. Lima Frances, O. Villalobos Baillie, Ph. Leruste, B. R. French, M. Girone, Leonardo Paolo Rossi, A.K. Holme, J. L. Narjoux, Haavard Helstrup, B. Ghidini, David H. Evans, W. Beusch, M. Benayoun, F. Navach, E. Quercigh, A. Malamant, and D. Di Bari

Subjects
Physics, Nuclear and High Energy Physics, Plasma formation, Nuclear Theory, chemistry.chemical_element, Tungsten, Omega, Sulfur, Baryon, Nuclear physics, chemistry, Quark–gluon plasma, Transverse mass, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Multi-strange baryon and antibaryon production is expected to be a useful probe in the search for quark-gluon plasma formation. We present the transverse mass distributions of negative particles, Λ' s , Λ ' s and Ξ − ' s produced in sulphur-tungsten interactions at 200 GeV/c per nucleon and give the corrected rations Λ /Λ, Ξ − /Λ and Ξ − / Λ . Our ratio Ξ − / Λ appears to be larger than that from pp interactions.

Published
1991
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14. Λ and anti-Λ production in 32S + W and p + W interactions at 200 A GeV/c

Author

R. Zitoun, V. Lenti, K. Knudson, J. N. Carney, M. T. Trainer, B. R. French, David H. Evans, I. J. Bloodworth, K. Manzari, A. Malamant, B. Ghidini, A. Jacholkowski, E. Quercigh, S. Abatzis, R. A. Loconsole, A. Bravar, W. Beusch, R. P. Barnes, Ph. Leruste, A. Volte, M. Benayoun, F. Navach, R. Sené, J. Kahane, A. Kirk, R. Fini, J. C. Lassalle, O. Villalobos Baillie, M. Tamazouzt, L. Lima Frances, J.B. Kinson, A. Penzo, J. P. Dufey, A. Palano, M. Stassinaki, M. Sené, M.F. Votruba, Leonardo Paolo Rossi, J. L. Narjoux, and G. Vassiliadis

Subjects
Nuclear reaction, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle decay, Meson, Hadron, Hyperon, Nucleon, Lambda baryon, Boson
Published
1991
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15. Preliminary results on direct soft photon production in π−p interactions at 280 GeV/c

Author

M. Grabowski, G.W. Wilson, A. Weigend, P. Sonderegger, K. Knudson, U. Kerres, J.A.G. Morris, Irene Vichou, A. Belogianni, B. R. French, G. Vassiliadis, E. Quercigh, A. Subramanian, W. Beusch, Yves Goldschmidt-Clermont, M. Spyropoulou-Stassinaki, Sw. Banerjee, T.J. Brodbeck, Dario Barberis, and S. Abatzis

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Soft photon
Published
1991
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16. Multi-strange baryon and antibaryon production in sulphur-tungsten and proton-tungsten interactions at 200 GeV/c per nucleon

Author

E. Quercigh, S. Abatzis, M. Sene, R. P. Barnes, B. Ghidini, F. Navach, J. P. Dufey, R. A. Fini, A. Palano, I. J. Bloodworth, O. Villalobos Baillie, A. Malamant, R. Falcone, M. T. Trainor, A. Volte, A. Bravar, J. Kahane, A. Kirk, Vito Manzari, G. Vassiliadis, R. Sené, W. Beusch, M.F. Votruba, B. R. French, M. Tamazouzt, R. A. Loconsole, Ph Leruste, J.B. Kinson, A. Penzo, M. Benayoun, K. Knudson, J. N. Carney, Leonardo Paolo Rossi, J. L. Narjoux, V. Lenti, M. Stassinaki, A. Jacholkowski, J. C. Lassalle, L. Lima Frances, and D. Evans

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Hyperon, Lambda baryon, Xi baryon, Nuclear physics, Baryon, Strange matter, Nuclear Experiment, Nucleon
Abstract

Production of multi-strange baryons and antibaryons is expected to be a useful indicator in the search for Quark-Gluon Plasma formation. Production of Ξ− and Ξ − has been observed for the first time in ultra-relativistic heavy ion interactions by the WA85 Experiment. We describe the procedure used to select these cascade candidates and show that Ξ− and Ξ − decays can be identified. Preliminary ratios of Ξ/Ξ production in sulphur-tungsten and proton-tungsten interactions are also presented.

Published
1991
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17. Strangeness production in sulphur-tungsten interactions at 200 GeV/c per nucleon

Author

J. L. Narjoux, Michele Arturo Caponero, G. Vassiliadis, R. Zitoun, A. Volte, R. Fini, M.F. Votruba, A. Malamant, J. C. Lassalle, R. Sené, B. R. French, A. Kirk, D. Evans, J.B. Kinson, A. Penzo, W. Beusch, M. Benayoun, F. Navach, V. Lenti, K. Knudson, R. Falcone, M. Sené, J. Kahane, M. Stassinaki, B. Ghidini, I. J. Bloodworth, A. Bravar, E. Quercigh, J. N. Carney, A. Jacholkowski, M. T. Trainor, J. P. Dufey, A. Palano, R. A. Loconsole, Ph. Leruste, S. Abatzis, O. Villalobos Baillie, and Leonardo Paolo Rossi

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Hadron, Strangeness production, Strangeness, Lambda baryon, Atomic and Molecular Physics, and Optics, Charged particle, Nuclear physics, Baryon, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Preliminary results from the WA85 Experiment at the CERN Omega Spectrometer are presented. A 200 A GeV/c beam of 22S ions was used with a tungsten target. The apparatus is used to detect V°s and charged tracks in the range PT > 0.9 GeV/c and 2.3 Λ, Λ and cascade particles is discussed. A study of the multiplicity dependence of Λ, Λ and hadron production is presented.

Published
1990
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18. Λ and production in sulphur-tungsten interactions at 200 GeV/c per nucleon

Author

W. Beusch, M. Benayoun, F. Navach, M. Stassinaki, A. Volte, R. Sené, E. Quercigh, R. Zitoun, J. Kahane, Leonardo Paolo Rossi, David H. Evans, Michele Arturo Caponero, B. Ghidini, A. Bravar, A. Malamant, R. Fini, A. Jacholkowski, J. L. Narjoux, M. T. Trainor, R. A. Loconsole, B. R. French, A. Kirk, Ph. Leruste, M.F. Votruba, J. C. Lassalle, I. J. Bloodworth, J. P. Dufey, M. Tamazouzt, A. Palano, M. Sené, S. Abatzis, V. Lenti, K. Knudson, J. N. Carney, J.B. Kinson, A. Penzo, L. Lima Frances, G. Vassiliadis, O. Villalobos Baillie, and R. P. Barnes

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, Hadron, Lambda baryon, Charged particle, Nuclear physics, Antimatter, High Energy Physics::Experiment, Rapidity, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Results from the WA85 Experiment at the CERN Ω Spectrometer are presented. A 200 A GeV/ c beam of 32 S ions was used with a tungsten target. The apparatus is used to detect V 0, s and charged tracks in the range p T > 0.9 GeV/ c and 2.3 Y lab Λ and negative hadrons all show a linear increase with rapidity density in the range 70–140 as expected from models based on a superposition of independent NN collisions.

Published
1990
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19. Acute myelogenous leukemia with tetrasomy 8 is a disease with a poor prognosis

Author

Tsirigotis, P. Papageorgiou, S. Abatzis, D. Athanatou, S. Girkas, C. Pappa, V. Pangalos, C. Papageorgiou, E. Dervenoulas, J. Raptis, S.

Abstract

Tetrasomy 8 is an extremely rare chromosome abnormality, one that has been reported in only a few cases with myeloid malignancies. The majority of reported cases consist of acute myelogenous leukemias (AML) of monocytic lineage. In slightly more than half of the patients, tetrasomy 8 was the single cytogenetic abnormality. Fluorescence in situ hybridization revealed tetrasomy 8 and trisomy 8 concurrently in all but one of the bone marrow samples. The clonal relationship between trisomy 8 and tetrasomy 8 in these cases remains to be clarified. Patients with tetrasomy 8 have a poor prognosis, and only 1 out of 33 patients was free of disease 3 years after autologous bone marrow transplantation. Here, we report the case of a 25-year-old female patient with monocytic leukemia and tetrasomy 8. © 2005 Elsevier Inc. All rights reserved.

Published
2005

20. Measurement of the production ratio in central S-W interactions at 200 A GeV/c

Author

S. Abatzis, A. Andrighetto, F. Antinori, R.P. Barnes, A.C. Bayes, M. Benayoun, W. Beusch, J.N. Carney, B. de la Cruz, D. Di Bari, J.P. Dufey, J.P. Davies, D. Elia, D. Evans, R. Fini, B.R. French, B. Ghidini, H. Helstrup, A.K. Holme, A. Jacholkowsi, J. Kahane, J.B. Kinson, A. Kirk, K. Knudson, J.C. Lassalle, V. Lenti, Ph. Leruste, V. Manzari, J.L. Narjoux, F. Navach, E. Quercigh, L. Rossi, K. Šafa^řík, M. Sené, R. Sené, T. Storås, G. Vassiliadis, O. Villalobos Baillie, A. Volte, and M.F. Votruba

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Plasma formation, Nuclear Theory, High Energy Physics::Phenomenology, chemistry.chemical_element, Astrophysics::Cosmology and Extragalactic Astrophysics, Tungsten, Omega, Nuclear physics, Baryon, chemistry, Quark–gluon plasma, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, Bar (unit)
Abstract

Strange baryon and in particular multiply strange baryon production is suggested to be a useful probe in the search for Quark-Gluon Plasma formation in heavy-ion collisions. We have measured the \( ({{\Omega }^{ - }} + {{\bar{\Omega }}^{ + }})/({{\Xi }^{ - }} + {{\bar{\Xi }}^{ + }}) \) production ratio at central rapidity and pT > 1.6 GeV/c to be 0.8 ± 0.4.

Published
1995
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21. Charged kaon production in S-W collisions at 200 GeV/c per nucleon

Author

S. Abatzis, A. Andrighetto, F. Antinori, R.P. Barnes, A.C. Bayes, M. Benayoun, W. Beusch, J.N. Carney, B. de la Cruz, D. Di Bari, J.P. Davies, J.P. Dufey, D. Elia, D. Evans, R. Fini, B.R. French, B. Ghidini, H. Helstrup, A.K. Holme, A. Jacholkowski, J. Kahane, J.B. Kinson, A. Kirk, K. Knudson, J.C. Lassalle, V. Lenti, Ph. Leruste, V. Manzari, F. Navach, J.L. Narjoux, E. Quercigh, L. Rossi, K. Šafařík, M. Sené, R. Sené, T. Storås, G. Vassiliadis, O. Villalobos Baillie, A. Volte, and M.F. Votruba

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, chemistry.chemical_element, Tungsten, Omega, Spectral line, Nuclear physics, Pion, chemistry, Transverse mass, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Results on central production of charged kaons in sulphur-tungsten interactions have been obtained by the WA85 Collaboration. The procedure used to select K + and K − particles, identified through their decay to three charged pions, is described. The m T spectra for K + and K − and the ratio K + K − , calculated in the kinematic region p T ≥ 0.9 GeV/ c and 2.3 ≤ y lab ≤ 3.0 are presented.

Published
1995

22. A study of cascade and strange baryon production in sulphur-sulphur interactions at 200 GeV/c per nucleon

Author

B. R. French, M. Morando, L. Šándor, F. Pellegrini, D. Elia, R. A. Loconsole, Roman Lietava, A. Kirk, V. A. Katchanov, Ph. Leruste, N. Carrer, Federico Antinori, Håvard Helstrup, B. De La Cruz, D. Di Bari, J. C. Lassalle, G. Vassiliadis, R. A. Fini, Ivan Kralik, A. V. Singovsky, J. Kahane, S. Abatzis, K. Šafařík, K. Knudson, V. Lenti, P. Ladron de Guevara, A. Jacholkowski, J. N. Carney, M.F. Votruba, F. Navach, A.K. Holme, O. Villalobos Baillie, R. A. Ricci, G. Løvhøiden, Alberto Andrighetto, G.F. Segato, E. Quercigh, J. Bohm, J. P. Davies, M. Venables, J. L. Narjoux, E. Andersen, Jozef Urban, B. Ghidini, M. Sené, A. C. Bayes, Vito Manzari, W. Beusch, M. Benayoun, David H. Evans, K. Fanebust, A. Volte, R. Sené, K.L. Norman, J.B. Kinson, Petr Zavada, and T.F. Thorsteinsen

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Spectrometer, Nuclear Theory, Omega, Spectral line, Baryon, Nuclear physics, Transverse mass, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, Nucleon, Astrophysics::Galaxy Astrophysics, Particle Physics - Experiment, Nuclear Physics
Abstract

Strange and multistrange baryon and antibaryon production has been studied in sulphur sulphur interactions at 200 GeV/c per nucleon at central rapidity using the CERN Omega Spectrometer. Particle production ratios and transverse mass spectra are presented for Λ, Ξ−, Λ and Ξ−.

Published
1995

23. Λ and Ξ− production in proton-tungsten interactions at 200 GeV/c per nucleon

Author

B. R. French, Domenico Di Bari, A. Volte, J. P. Dufey, D. Elia, R. Sené, Federico Antinori, J. L. Narjoux, Ph. Leruste, S. Abatzis, J. Kahane, V. Lenti, B. Ghidini, K. Šafařík, A. C. Bayes, J. P. Davies, Haavard Helstrup, Vito Manzari, M. Sene, F. Navach, J.B. Kinson, A. Jacholkowski, A. Kirk, Leonardo Paolo Rossi, J. C. Lassalle, B. De La Cruz, T. Storȧȧs, K. Knudson, J. N. Carney, M.F. Votruba, A.K. Holme, R. A. Fini, D. Evans, G. Vassiliadis, E. Quercigh, O. Villalobos Baillie, R. P. Barnes, W. Beusch, M. Benayoun, and Alberto Andrighetto

Subjects
Nuclear physics, Physics, Baryon, Particle physics, Hadron, Hyperon, Rapidity, Strangeness, Lambda baryon, Nucleon, Xi baryon
Abstract

The primary aim of the WA85 experiment is the study of strange and multistrange baryon and anti‐baryon production. Particles are detected in the kinematic window of central rapidity and pT≳1.0 GeV/c. Results on the production of Λ, Λ,Ξ− and Ξ− hyperons in proton‐tungsten interactions from the 1990 run are presented and compared with the sulphur‐tungsten data.

Published
1995
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24. Review of strange particle production from the WA85 Collaboration

Author

E. Quercigh, R. P. Barnes, Alberto Andrighetto, S. Abatzis, K. Šafařrík, B. R. French, J. C. Lassale, M. Sene, W. Beusch, O. Villalobos Baillie, J. Kahane, T. Storås, A.K. Holme, A. C. Bayes, M. Benayoun, G. Vassiliadis, Federico Antinori, Vito Manzari, Ph Leruste, J. P. Dufey, R. A. Fini, V. Lenti, D. Elia, B. Ghidini, A. Kirk, F. Navach, J. L. Narjoux, D. Di Bari, D. Evans, J. P. Davies, J.B. Kinson, A. Volte, R. Sené, A. Jacholkowski, Leonardo Paolo Rossi, B. De La Cruz, Haavard Helstrup, K. Knudson, J. N. Carney, and M.F. Votruba

Subjects
Physics, Strange quark, Plasma formation, High Energy Physics::Phenomenology, Nuclear Theory, Hyperon, Strangeness, Nuclear physics, Baryon, Mass spectrum, Particle, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

Strange and, especially, multistrange baryon and anti‐baryon production is expected to be a useful probe in the search for Quark‐Gluon Plasma formation. A review of WA85 results on strange and multistrange particle production in SW and pW interactions at 200 GeV/c per nucleons is presented. In particular, mT distributions and relative ratios are presented for Ξ−s, Ξ−s, Λs, Λs, and K0s.

Published
1995
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25. Charged kaon spectra in SW interactions at 200 GeV/c per nucleon

Author

V. Lenti, J. P. Davies, W. Beusch, R. A. Fini, D. Di Bari, A. Jacholkowski, M. Benayoun, D. Evans, B. R. French, R. P. Barnes, K. Knudson, J. N. Carney, A.K. Holme, T. Storås, Ph Leruste, Haavard Helstrup, O. Villalobos Baillie, A. Volte, A. Kirk, G. Vassiliadis, Federico Antinori, R. Sené, J. C. Lassalle, K. Šafařrí, E. Quercigh, J.B. Kinson, Alberto Andrighetto, B. Ghidini, F. Navach, S. Abatzis, Leonardo Paolo Rossi, B. De La Cruz, J. P. Dufey, D. Elia, J. Kahane, A. C. Bayes, Vito Manzari, M. Sene, M.F. Votruba, and J. L. Narjoux

Subjects
Nuclear physics, Nuclear reaction, Physics, Particle physics, Meson, Branching fraction, Hadron, Mass spectrum, Elementary particle, Nucleon, Boson
Abstract

New results on the production of charged kaons in Sulphur‐Tungsten interactions have been obtained by the WA85 Collaboration. We present mt spectra for K+ and K− particles and the ratio

Published
1995
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26. New results on strange and multistrange baryon production and charged kaon production in sulphur sulphur interactions at 200 GeV/c per nucleon

Author

V. Lenti, R. A. Loconsole, G.F. Segato, E. Quercigh, Petr Zavada, A. Kirk, Ph Leruste, B. De La Cruz, K. Šafařík, N. Carrer, L. Sandor, J. L. Narjoix, V. A. Katchanov, Haavard Helstrup, M.F. Votruba, R. A. Fini, B. Ghidini, G. Lo, M. Morando, D. Elia, T.F. Thorsteinsen, R. Licci, F. Navach, J. Bohm, M. Venables, K. Knudson, P. Ladron de Guevara, S. Abatzis, A. V. Singovsky, G. Vassiliadis, J. N. Carney, vho, A.K. Holme, J.B. Kinson, J. C. Lassalle, F. Pellegrini, A. Jacholkowski, D. Di Bari, D. Evans, J. Kahane, A. C. Bayes, A. Volte, Vito Manzari, R. Lietava, R. Sené, K. Fanebust, E. Andersen, Federico Antinori, B. R. French, Ivan Kralik, M. Sene, J. Urban, R. P. Barnes, W. Beusch, O. Villalobos Baillie, Alberto Andrighetto, M. Benayoun, J. P. Davies, and iden

Subjects
Physics, Particle physics, Nuclear Theory, chemistry.chemical_element, Sulfur, Omega, Charged particle, Spectral line, Baryon, Nuclear physics, chemistry, Transverse mass, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, Nucleon
Abstract

Strange and multistrange baryon and antibaryon production has been studied in sulphur sulphur interactions at 200 GeV/c per nucleon at central rapidity. Particle production ratios and transverse mass spectra are presented for Λ, Ξ−, Ξ and Ξ−. In addition preliminary results on charged kaon production are presented, and the status of identified charged particle track reconstruction using the Omega RICH is reviewed.

Published
1995
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27. Ω/Ξ production ratio in S-W

Author

O. Villalobos Baillie, S. Abatzis, A.K. Holme, D. Evans, B. Ghidini, F. Antinori, Alberto Andrighetto, T. Storås, R. A. Fini, R. P. Barnes, Ph. Leruste, F. Navach, A. Volte, A. Jacholkowski, J. C. Lassalle, J. P. Dufey, R. Sené, V. Lenti, W. Beusch, K. Knudson, D. Elia, J. N. Carney, M. Benayoun, E. Quercigh, Haavard Helstrup, Karel Safarik, G. Vassiliadis, J.B. Kinson, A. Kirk, Leonardo Paolo Rossi, B. De La Cruz, J. Kahane, A. C. Bayes, Vito Manzari, Federico Antinori, J. L. Narjoux, M. Sene, B. R. French, Domenico Di Bari, J. P. Davies, and M.F. Votruba

Subjects
Baryon, Nuclear physics, Nuclear reaction, Chemistry, Branching fraction, Hadron, Hyperon, Rapidity, Atomic physics, Omega baryon, Xi baryon
Abstract

We have measured the (Ω−+Ω+)/(Ξ−+Ξ+) production ratio in central S‐W collisions to be 0.8±0.4 at central rapidity and pT≳1.6 GeV/c.

Published
1995
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28. Production of multistrange baryons and antibaryons in sulphur-tungsten interactions at 200 GeV/c per nucleon

Author

Leonardo Paolo Rossi, J. L. Narjoux, V. Lenti, K. Knudson, J. N. Carney, A. Jacholkowski, David H. Evans, R. A. Loconsole, M. Sené, Federico Antinori, Ph. Leruste, A. Malamant, W. Beusch, E. Quercigh, M. T. Trainor, M. Benayoun, F. Navach, A. Kirk, A. Bravar, R. Fini, A.K. Holme, J. Kahane, K. Šafařík, B. R. French, J. P. Dufey, A. Palano, J. C. Lassalle, D. Di Bari, S. Abatzis, L. Lima Frances, B. Ghidini, A. Volte, R. Sené, M.F. Votruba, R. P. Barnes, I. J. Bloodworth, M. Tamazouzt, J.B. Kinson, A. Penzo, O. Villalobos Baillie, Håvard Helstrup, G. Vassiliadis, and V. Manzari

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, chemistry.chemical_element, Tungsten, Sulfur, Omega, Baryon, Nuclear physics, chemistry, Cascade, Quark–gluon plasma, Rapidity, Nucleon, Particle Physics - Experiment
Abstract

Production of Ξ − and Ξ − has been observed for the first time in heavy ion interactions by the WA85 Experiment. Multistrange baryon and antibaryon production is expected to be a useful probe in the search for quark-gluon plasma formation. We describe the procedure used to select these cascade candidates and show that Ξ − and Ξ − decays can be identified. The ratio of Ξ Ξ production, corrected for geometrical acceptances and reconstruction efficiencies, is 0.39 ± 0.07 for sulphur-tungsten interactions in the central rapidity interval 2.3 Y lab p T >1.1 GeV/ c .

Published
1990

29. Preliminary results from the WA85 experiment on Λ and gL production in 200 a GeV/C sulphur-tungsten interactions

Author

A. Kirk, J. P. Dufey, V. Lenti, K. Knudson, E. Quercigh, A. Malamant, M. T. Trainor, J. N. Carney, A. Bravar, O. Villalobos Baillie, R. Fini, S. Abatzis, Leonardo Paolo Rossi, B. Ghidini, A. Jacholkowski, W. Beusch, J. Kahane, J. L. Narjoux, M. Benayoun, F. Navach, M.F. Votruba, M. Sené, R. A. Loconsole, M. Stassinaki-Spyropoulou, B. R. French, Ph. Leruste, A. Volte, I. J. Bloodworth, R. Sené, J. C. Lassalle, J.B. Kinson, A. Penzo, R. Zitoun, G. Vassiliadis, Michele Arturo Caponero, and R. Falcone

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Pair production, chemistry, Branching fraction, Hadron, Analytical chemistry, Mass spectrum, chemistry.chemical_element, Tungsten, Nucleon, Lambda baryon
Published
1989
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30. Hyperon production in proton-tungsten interactions at 200 GeV/c

Author

J. P. Davies, E. Quercigh, A. Kirk, T. Storås, J. P. Dufey, A.K. Holme, K. Knudson, M. Venables, J. N. Carney, A. Volte, Domenico Di Bari, J. C. Lassalle, J.A. Lien, O. Villalobos Baillie, M.F. Votruba, A. Jacholkowski, R. Sené, R A. Fini, B. Ghidini, Davide Elia, J.B. Kinson, Rocco Caliandro, R. P. Barnes, B. R. French, R.A. Loconsole, A. C. Bayes, F. Navach, Ph. Leruste, Vito Manzari, S. Abatzis, David H. Evans, Federico Antinori, K. Šafařík, A. Andrighetto, Håvard Helstrup, B. De La Cruz, G. Vassiliadis, M. Sené, J. Kahane, V. Lenti, Leonardo Paolo Rossi, J. L. Narjoux, W. Beusch, and M. Benayoun

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton, chemistry, Yield (chemistry), Hyperon, chemistry.chemical_element, Transverse mass, Particle, Tungsten, Atomic physics, Spectral line
Abstract

The relative production yields and transverse mass spectra for Λ, Λ , Ξ− and Ξ + hyperons in proton-tungsten interactions are presented and compared with the WA85 results from central sulphur-tungsten interactions. A study of the negative particle yield has also been undertaken and the ratio of Λ hyperons to negative particles has been calculated.

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