A statistical model analysis of yields and fluctuations in 200 GeV Au-Au collisions

• Autorzy: Torrieri G. , Jeon S. , Rafelski J.
• Konferencja: Proceedings of the 18th International conference on Nucleus-Nucleus Collisions QUARK MATTER 2005, 4-9 August, 2005, Budapest, Hungary
• Języki publikacji: EN

Abstrakty

EN

We show that the simultaneous measurement of yields and fluctuations is capable of falsifying and constraining the statistical hadronization model. We show how such a measurement can test for chemical non-equilibrium, and distinguish between a high temperature chemically equilibrated freeze-out from a supercooled freeze-out with an oversaturated phase space. We perform a fit, and show that both yields and fluctuations measured at RHIC 200 GeV can be accounted for within the second scenario, with both the light and strange quark phase space saturated significantly above detailed balance. We point to the simultaneous fit of the K/đ fluctuation and the K*/K ratio as evidence that the effect of hadronic re-interactions after freeze-out is small.

Słowa kluczowe

EN

fluctuations; freeze-out is small; heavy-ion collisions; statistical models

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2006
• Tom: Vol. 51,suppl.3
• Strony: 99--103
• Opis fizyczny: Bibliogr. 31 poz., rys.

Twórcy

autor

Torrieri G.

autor

Jeon S.

autor

Rafelski J.

• Department of Physics, McGill University, Montréal, QC H3A-2T8, Canada, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Adams J et al. (STAR Collaboration) (2003) Multiplicity fluctuations in Au+Au collisions at s(NN)**(1/2) =130-GeV. Phys Rev C 68:044905
• 2. Adams J et al. (STAR Collaboration) (2004) Identified particle distributions in p p Au + Au collisions at s**(1/2)= 200-GeV. Phys Rev Lett 92:112301
• 3. Adams J et al. (STAR Collaboration) (2005) Phi meson production in Au+Au p+p collisions at s**(1/2) = 200- GeV. Phys Lett B 612:181?189
• 4. Adcox K et al. (PHENIX Collaboration) (2002) Net charge fluctuations in Au+Au interactions at s(NN)**(1/2) =130-GeV. Phys Rev Lett 89:082301
• 5. Barannikova O et al. (STAR Collaboration) (2004) Probing collision dynamics at RHIC. APS arXiv:nucl-ex/0403014
• 6. Begun VV, Gazdzicki M, Gorenstein MI, Zozulya OS (2004) Particle number fluctuations in canonical ensemble. Phys Rev C 70:034901
• 7. Bleicher M, Liu FM, Keranen A et al. (2002)Overpopulation of anti-Omega in p p collisions: a way to distinguish statistical hadronization from string dynamics.Phys Rev Lett 88:202501
• 8. Braun-Munzinger P, Magestro D, Redlich K, Stachel J (2001) Hadron production in Au Au collisions at RHIC.Phys Lett B 518:41?46
• 9. Cleymans J, Redlich K (1999) Chemical thermal freezeout parameters from 1-A-GeV to 200-A-GeV. Phys Rev C 60:054908
• 10. Csorgo T, Csernai L (1993) Quark-gluon plasma freezeout from a supercooled state. APS arXiv:hep-ph/9312330
• 11. Das S et al. (STAR Collaboration) (2005) Event by event fluctuation in K/pi ratio at RHIC. APS arXiv:nucl-ex/0503023
• 12. Fermi E (1950) High energy nuclear events. Prog Theor Phys 5:570?583
• 13. Flierl D et al. (NA49 Collaboration) Indications for the onset of deconfinement in nucleus nucleus collisions. APSarXiv:nucl-ex/0410041
• 14. Hagedorn R (1965) Statistical thermodynamics of strong interactions at high energies. Nuovo Cimento 2:Suppl:147?186
• 15. Jeon S, Koch V (1999) Fluctuations of particle ratios and the abundance of hadronic resonances. Phys Rev Lett 83:5435?5438
• 16. Jeon S, Koch V (2000) Charged particle ratio fluctuation as a signal for QGP. Phys Rev Lett 85:2076?2079
• 17. Jeon S, Koch V, Redlich K, Wang XN (2002) Fluctuations of rare particles as a measure of chemical equilibration. Nucl Phys A 697:546?562
• 18. Landau LD (1953) On the multiparticle production in high-energy collisions. Izv Akad Nauk Ser Fiz 17:51?64(in Russian)
• 19. Letessier J, Rafelski J (2000) Observing quark-gluon plasma with strange hadrons. Int J Mod Phys E 9:107?147
• 20. Letessier J, Rafelski J (2002) Hadrons quark-gluon plasma. Cambridge Monogr Part Phys Nucl Phys Cosmol 18:1?397
• 21. Letessier J, Rafelski J (2005) Hadron production phase changes in relativistic heavy ion collisions. APS arXiv:nucl-th/0504028
• 22. Pomeranchuk I (1951) On multiparticle production in single interaction process. Dokl Akad Nauk Ser Fiz 78:889?891 (in Russian)
• 23. Pruneau C, Gavin S, Voloshin S (2002) Methods for the study of particle production fluctuations. Phys Rev C 66:044904
• 24. Rafelski J, Letessier J (2000) Sudden hadronization in relativistic nuclear collisions. Phys Rev Lett 85:4695?4698
• 25. Rafelski J, Letessier J (2004) Strangeness and quarkgluon plasma. J Phys G 30:S1?S28
• 26. Rafelski J, Letessier J, Torrieri G (2005) Centrality dependence of bulk fireball properties at RHIC. Phys Rev C 72:024905
• 27. Torrieri G, Jeon S, Letessier J, Rafelski J (2006) SHAREv2: fluctuations and a comprehensive treatment of decay feed-down. APS arXiv:nucl-th/0603026
• 28. Torrieri G, Jeon S, Rafelski J (2006) Fluctuations of particle ratios the abundance of hadronic resonances.Phys Rev C 74:024901
• 29. Torrieri G, Rafelski J (2004) Multiplicities and bulk thermodynamic quantities at s(NN)**(1/2) = 130 GeV with SHARE. APS arXiv:hep-ph/0409160
• 30. Torrieri G, Steinke S, Broniowski W, Florkowski W, Letessier J, Rafelski J (2004) SHARE: statistical hadronization with resonances. Comput Phys Commun 167:229?251
• 31. www2.mcdaniel.edu/Chemistry/ch307.notes/Chemical%20Equilibrium.html