Ξ(Ω) production in Pb + Pb collisions at 158 GeV/c

Grazyna Janina Odyniec, Sergey V. Afanasiev, Thomas Alber, Harald Appelshäuser, Joachim Bächler, Stephen John Bailey, Lee Stuart Barnby, Jerzy Bartke, Helena Białkowska, Charles O. Blyth, Rudolf Bock, Christian Bormann, Franklin Paul Brady, Robert Brockmann, Nenad Buncic, Predrag Bunčić, Helen Louise Caines, Daniel A. Cebra, P. Chan, Glenn E. Cooper, John G. Cramer, Pauline B. Cramer, Péter Csató, Oliver Dietz, J Dunn, Volker Eckardt, Frank Eckhardt, M I. Ferguson, Hans Gerhard Fischer, Dominik Bernhard Flierl, Zoltán Fodor, Panagiota Foka, Peter Freund, Volker Friese, M. Fuchs, Frank Gabler, József Gál, Marek Gaździcki, Ewa Gładysz-Dziaduś, Jaroslaw Grebieszkow, J Günther, John W. Harris, Sándor Hegyi, Torsten Henkel, L A Hill, I. Huang, M A. Howe, Holm Gero Hümmler, George J. Igo, Detlef Irmscher, Peter Martin Jacobs, Peter Graham Jones, Krešo Kadija, Vadim I. Kolesnikov, Anton Konashenok, Marek Kowalski, Brian Lasiuk, Péter Lévai, Aleksandr I. Malakhov, Spyridon Margetis, Christina Markert, Georgy L. Melkumov, Andreas Mock, József Molnár, John M. Nelson, Gabriella Pálla, Apostolos D. Panagiotou, Athanasios Petridis, Andreas Piper, R. Jefferson Porter, Arthur M. Poskanzer, Stefan Poziombka, Duncan J. Prindle, Falk Pühlhofer, Wolfgang Hans Rauch, Jeffrey G. Reid, Rainer Arno Ernst Renfordt, Waldemar Retyk, Hans Georg Ritter, Dieter Röhrich, Christof Roland, Gunther Roland, Heinrich Rudolph, Andrzej Rybicki, Iwona Sakrejda, Andres Sandoval, Hans Sann, Alexei Yu. Semenov, E. Schäfer, Dirk Schmischke, Norbert Schmitz, Stefan Schönfelder, Peter Seyboth, Jurgen Seyerlein, Ferenc Siklér, Ewa Skrzypczak, Gordon Thomas Anderson Squier, Reinhard Stock, Herbert Ströbele, Imre Szentpétery, János Sziklai, Milton Y. Toy, Thomas A. Trainor, Stephen Trentalange, Thomas Ullrich, Maria Vassiliou, György Vesztergombi, Danilo Vranić, Feipeng Wang, Dhammika D. Weerasundara, Siegfried Wenig, Charles A. Whitten, Thomas Wienold, Lindsay Wood, T. A. Yates, József Zimányi, Xue-Zhou Zhu, Ryszard Zybert

  • Using the NA49 main TPC, the central production of hyperons has been measured in CERN SPS Pb - Pb collisions at 158 GeV c-1. The preliminary ratio, studied at 2.0 < y < 2.6 and 1 < pT < 3 GeV c-1, equals ~ (13 ± 4)% (systematic error only). It is compatible, within errors, with the previously obtained ratios for central S + S [1], S + W [2], and S + Au [3] collisions. The fit to the transverse momentum distribution resulted in an inverse slope parameter T of 297 MeV. At this level of statistics we do not see any noticeable enhancement of hyperon production with the increased volume (and, possibly, degree of equilibration) of the system from S + S to Pb + Pb. This result is unexpected and counterintuitive, and should be further investigated. If confirmed, it will have a significant impact on our understanding of mechanisms leading to the enhanced strangeness production in heavy-ion collisions.

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Author:Grazyna Janina Odyniec, Sergey V. AfanasievORCiDGND, Thomas Alber, Harald AppelshäuserGND, Joachim Bächler, Stephen John Bailey, Lee Stuart BarnbyORCiD, Jerzy BartkeGND, Helena BiałkowskaORCiD, Charles O. Blyth, Rudolf BockGND, Christian BormannGND, Franklin Paul Brady, Robert Brockmann, Nenad Buncic, Predrag Bunčić, Helen Louise CainesORCiD, Daniel A. CebraORCiD, P. Chan, Glenn E. Cooper, John G. CramerGND, Pauline B. Cramer, Péter Csató, Oliver Dietz, J Dunn, Volker Eckardt, Frank Eckhardt, M I. Ferguson, Hans Gerhard Fischer, Dominik Bernhard FlierlGND, Zoltán FodorGND, Panagiota FokaORCiD, Peter Freund, Volker FrieseORCiDGND, M. Fuchs, Frank GablerGND, József Gál, Marek GaździckiORCiD, Ewa Gładysz-DziaduśORCiD, Jaroslaw Grebieszkow, J Günther, John W. HarrisORCiDGND, Sándor Hegyi, Torsten HenkelGND, L A Hill, I. Huang, M A. Howe, Holm Gero HümmlerGND, George J. Igo, Detlef Irmscher, Peter Martin JacobsORCiD, Peter Graham Jones, Krešo Kadija, Vadim I. KolesnikovORCiD, Anton Konashenok, Marek Kowalski, Brian Lasiuk, Péter LévaiGND, Aleksandr I. MalakhovGND, Spyridon Margetis, Christina MarkertORCiDGND, Georgy L. Melkumov, Andreas Mock, József Molnár, John M. Nelson, Gabriella Pálla, Apostolos D. Panagiotou, Athanasios PetridisORCiD, Andreas Piper, R. Jefferson PorterORCiD, Arthur M. PoskanzerORCiDGND, Stefan Poziombka, Duncan J. Prindle, Falk PühlhoferGND, Wolfgang Hans Rauch, Jeffrey G. Reid, Rainer Arno Ernst Renfordt, Waldemar Retyk, Hans Georg Ritter, Dieter RöhrichORCiD, Christof RolandORCiDGND, Gunther RolandGND, Heinrich Rudolph, Andrzej RybickiORCiD, Iwona Sakrejda, Andres SandovalORCiD, Hans Sann, Alexei Yu. Semenov, E. Schäfer, Dirk Schmischke, Norbert SchmitzGND, Stefan Schönfelder, Peter SeybothORCiDGND, Jurgen SeyerleinGND, Ferenc SiklérORCiD, Ewa Skrzypczak, Gordon Thomas Anderson Squier, Reinhard StockGND, Herbert Ströbele, Imre Szentpétery, János SziklaiORCiD, Milton Y. Toy, Thomas A. TrainorORCiD, Stephen TrentalangeORCiD, Thomas UllrichORCiDGND, Maria VassiliouORCiD, György Vesztergombi, Danilo VranićGND, Feipeng Wang, Dhammika D. Weerasundara, Siegfried WenigORCiD, Charles A. Whitten, Thomas WienoldGND, Lindsay Wood, T. A. Yates, József Zimányi, Xue-Zhou Zhu, Ryszard Zybert
URN:urn:nbn:de:hebis:30-17154
DOI:https://doi.org/10.1088/0954-3899/23/12/005
ISSN:0305-4616
Parent Title (German):Journal of physics. G, Nuclear and particle physics
Publisher:IOP Publ.
Place of publication:Bristol
Document Type:Article
Language:English
Year of Completion:1997
Year of first Publication:1997
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Creating Corporation:NA49 Collaboration
Release Date:2005/09/30
Volume:23.1997
Issue:12
Page Number:9
First Page:1827
Last Page:1835
HeBIS-PPN:185269664
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoDeutsches Urheberrecht