Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV
Results are presented on event-by-event fluctuations of transverse momenta pT in central Pb[plus]Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1<y[subscript pi][superscript *]<2.6). Three fluctuation...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/54239 https://orcid.org/0000-0001-8983-2169 |
| _version_ | 1811077908794441728 |
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| author | Veres, Gabor Roland, Christof E Roland, Gunther M |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Veres, Gabor Roland, Christof E Roland, Gunther M |
| author_sort | Veres, Gabor |
| collection | MIT |
| description | Results are presented on event-by-event fluctuations of transverse momenta pT in central Pb[plus]Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1<y[subscript pi][superscript *]<2.6). Three fluctuation measures were studied: the distribution of average transverse momentum M(p[subscript T]) in the event, the Φp[subscript T] fluctuation measure, and two-particle transverse momentum correlations. Fluctuations of pT are small and show no significant energy dependence in the energy range of the CERN Super Proton Synchrotron. Results are compared with QCD-inspired predictions for the critical point, and with the UrQMD model. Transverse momentum fluctuations, similar to multiplicity fluctuations, do not show the increase expected for freeze-out near the critical point of QCD. |
| first_indexed | 2024-09-23T10:50:12Z |
| format | Article |
| id | mit-1721.1/54239 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:50:12Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/542392023-02-26T05:58:36Z Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV Energy dependence of transverse momentum fluctuations in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV Veres, Gabor Roland, Christof E Roland, Gunther M Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Roland, Gunther M. Veres, Gabor Roland, Christof E. Roland, Gunther M. Results are presented on event-by-event fluctuations of transverse momenta pT in central Pb[plus]Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1<y[subscript pi][superscript *]<2.6). Three fluctuation measures were studied: the distribution of average transverse momentum M(p[subscript T]) in the event, the Φp[subscript T] fluctuation measure, and two-particle transverse momentum correlations. Fluctuations of pT are small and show no significant energy dependence in the energy range of the CERN Super Proton Synchrotron. Results are compared with QCD-inspired predictions for the critical point, and with the UrQMD model. Transverse momentum fluctuations, similar to multiplicity fluctuations, do not show the increase expected for freeze-out near the critical point of QCD. FOM of the Netherlands Croatian Ministry of Science, Education and Sport (Project 098-0982887-2878) Bulgarian National Science Fund (Ph-09/05) Korea Research Foundation (KRF-2007-313-C00175) Országos Tudományos Kutatási Alapprogramok Hungarian National Science Foundation Hungarian Scientific Research Foundation (T032648, T032293, T043514) Polish Ministry of Science and Higher Education (1 P03B 006 30, 1 P03B 127 30, 0297/B/H03/2007/33, N N202 078735), Bundesministerium für Bildung und Forschung, Germany United States Department of Energy (Grant DE-FG03-97ER41020/A000 2010-04-27T20:03:49Z 2010-04-27T20:03:49Z 2009-04 2008-11 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/54239 NA49 Collaboration et al. “Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV.” Physical Review C 79.4 (2009): 044910. ©2009 The American Physical Society. https://orcid.org/0000-0001-8983-2169 en_US http://dx.doi.org/10.1103/PhysRevC.79.044904 Physical Review C Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Veres, Gabor Roland, Christof E Roland, Gunther M Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title | Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title_full | Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title_fullStr | Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title_full_unstemmed | Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title_short | Energy dependence of transverse momentum fluctuations in Pb[plus]Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV |
| title_sort | energy dependence of transverse momentum fluctuations in pb plus pb collisions at the cern super proton synchrotron sps at 20a to 158a gev |
| url | http://hdl.handle.net/1721.1/54239 https://orcid.org/0000-0001-8983-2169 |
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