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3 results on '"N. Pisutova"'

1. Role of gluon depletion in J/ψ suppression

Author

Jan Pisut, Rudolph C. Hwa, and N. Pisutova

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Parton, 01 natural sciences, Gluon, Nuclear physics, Formalism (philosophy of mathematics), medicine.anatomical_structure, 0103 physical sciences, medicine, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nuclear theory, Nucleus, Production rate
Abstract

The depletion of gluons as the parton flux traverses a nucleus in a heavy-ion collision can influence the production rate of heavy-quark states. Thus the suppression of J/{psi} can be due to gluon depletion in the initial state in addition to nuclear and hadronic absorption in the final state. A formalism is developed to describe the depletion effect. It is shown that, without constraints from other experimental facts beside the J/{psi} suppression data in pA and AB collisions, it is not possible to determine the relative importance of depletion vs absorption. Possible relevance to the enhanced suppression seen in the Pb-Pb data is mentioned but not studied. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997
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2. Strange Baryon Production from the NA57 Experiment at the CERN SPS

Author

F.F. Valiev, J. Urban, Federico Antinori, I. J. Bloodworth, Anju Bhasin, M. A. Mazzoni, Anton Jusko, Ivan Kralik, B. Ghidini, G. A. Feofilov, K. Fanebust, R. A. Fini, A.P. de Haas, A. Michalon, F. Navach, P. Vande Vyvre, Dieter Røhrich, Giuseppe Bruno, Rocco Caliandro, M. Luptak, M. Campbell, J. Pišút, P.C. de Rijke, G.F. Segato, E. Quercigh, Angela Badala, G. Romano, T. Vik, R. F. Clarke, O. Villalobos Baillie, V. P. Kondratiev, A.K. Holme, F. Fayazzadeh, Franco Meddi, K. Šafařík, G. Martinská, J. Ftacnik, Andrea Dainese, A. Kolojvari, N. Carrer, Rosario Turrisi, Trine Spedstad Tveter, R. Kamermans, M.F. Votruba, S A Bull, T.A. Toulina, D. Muigg, E. Nappi, M. Sené, K. Knudson, V. Lenti, A. Belogianni, Tiziano Virgili, A. Jacholkowski, N. Pisutova, M. Morando, vho, Leonid Vinogradov, M. Spyropoulou-Stassinaki, Petr Zavada, G. Lo, N. van Eijndhoven, F. Posa, P.I. Norman, G. T. Jones, Pavel Staroba, L. Sandor, Haavard Helstrup, P. van den Ven, E. Schillings, Roberto Divia, Wisla Carena, D. Di Bari, A. van den Brink, D. Evans, M. Henriquez, iden, Francesco Riggi, G. S. Pappalardo, P. G. Kuijer, D. Elia, G. Grella, Vito Manzari, F. Soramel, A. Vascotto, W. Snoeys, R. Lietava, R. Sené, J.B. Kinson, J. van Hunen, A. Palmeri, Janka Vrlakova, P. Jovanovic, J. Fedorisin, Adela Kravcakova, S. Di Liberto, B. Pastirčák, and Roberto Barbera

Subjects
Physics, Particle physics, Strange quark, Physics::Instrumentation and Detectors, Nuclear Theory, Hyperon, Omega baryon, Lambda baryon, Xi baryon, Sigma baryon, Baryon, Nuclear physics, Strange matter, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The production of strange baryons and anti‐baryons in PbPb and pBe collisions has been studied by the NA57 experiment at the CERN SPS, extending down the centrality range covered by the previous WA97 experiment, and collecting data at two different energies. The enhanced production of such particles in central PbPb collisions with respect to pBe has been experimentally confirmed. This paper discusses results on Ⅺ and Λ hyperon production obtained at 40 and 158 A GeV/c.

Published
2002
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3. Results on hyperon production from CERN NA57 experiment

Author

M. Sené, Franco Meddi, M. Henriquez, A. Jacholkowski, D. Elia, Leonid Vinogradov, E. Nappi, V. Lenti, Tiziano Virgili, Vito Manzari, E. Schillings, Pavel Staroba, Roberto Divia, F. Soramel, Anton Jusko, Ivan Kralik, R. Kamermans, Federico Antinori, M.F. Votruba, Giuseppe Bruno, N. van Eijndhoven, P.C. de Rijke, R. Lietava, Wisla Carena, R. Sené, Rocco Caliandro, J. Urban, D. Di Bari, S A Bull, Janka Vrlakova, M. Campbell, A. Vascotto, D. Evans, J. Ftacnik, A.P. de Haas, F.F. Valiev, L. Sandor, J. Fedorisin, Adela Kravcakova, K. Šafařík, Trine Spedstad Tveter, Haavard Helstrup, K. Fanebust, J.B. Kinson, F. Fayazzadeh, W. Snoeys, A.K. Holme, M. A. Mazzoni, P.I. Norman, G. T. Jones, J. van Hunen, B. Ghidini, I. J. Bloodworth, P. Jovanovic, P van de Ven, P. Vande Vyvre, A. Palmeri, J. Pišút, F. Navach, Dieter Røhrich, Petr Zavada, K. Knudson, N. Pisutova, G. Romano, A. van den Brink, N. Carrer, O. Villalobos Baillie, V. P. Kondratiev, G. S. Pappalardo, P. G. Kuijer, Rosario Turrisi, M. Morando, Roberto Barbera, Anatoly Kolozhvari, Anju Bhasin, Francesco Riggi, G. A. Feofilov, G. Grella, F. Posa, S. Di Liberto, T. Vik, B. Pastirčák, R. F. Clarke, T.A. Toulina, D. Muigg, Gunnar Løvhøiden, M. Luptak, G.F. Segato, E. Quercigh, Angela Badala, R. A. Fini, A. Michalon, G. Martinská, 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), NA57, and Heyd, Yvette

Subjects
Physics, Particle physics, Large Hadron Collider, Nuclear Theory, Hyperon, Xi baryon, Baryon, Momentum, Nuclear physics, [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Quark–gluon plasma, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Beam (structure)
Abstract

NA57 has been specifically designed to study the onset of strange baryon and antibaryon enhancements in Pb-Pb with respect to p-Be collisions, first observed by the WA97 experiment at 160 A GeV/c beam momentum. The aim is to look for the dependence of these enhancements on the interaction volume, as measured by the number of wounded nucleons, and the energy per incoming nucleon. In NA57 the centrality range goes down to a lower limit of about 50 wounded nucleons, compared with about 100 in WA97. Data have been collected both at 160 and at 40 A GeV/c, while WA97 collected data only at the top SPS beam momentum of 160 A GeV/c. In this contribution we recall the main features of the NA57 experiment and we present the first results on Ⅺ− and Ⅺ+ hyperon production in Pb-Pb collisions at 160 A GeV/c.

Published
2001

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