Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions

ZHOU Dai-Mei; CAI Xu; LIU Zhi-Yi; LU Zhong-Dao; SA Ben-Hao

Chinese Physics C> 2002, Vol. 26> Issue(12) : 1271-1276

Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions

Institute of Particle Physics,Huazhong Normal University,Wuhan 430079,China2 China Institute of Atomic Energy,Beijing 102413,China

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Abstract：
Using a hadron and string cascade model,JPCIAE,and the corresponding Monte Carlo events generator,the behavior of the charged particle ratio event-by-event fluctuations in subsystem depending on energy,centrality,resonance decay and rapidity interval was investigated for Pb+Pb collisions at SPS and ALICE energies,and for Au+Au collisions at RHIC energies. The model results of charged particle ratio event-by-event fluctuations as a function of the rapidity interval in Pb+Pb collisions at SPS energies were comparable with the preliminary NA49 data. It turned out that the charged particle ratio fluctuation has no strong energy,centrality,resonance decay and rapidity interval dependences.

References

[1]

. Appelsh#228; H et al(NA49 Collab.).Phys.Lett.,1999,B459:679—686 2. LIU F ,TAIA ,Gazdzicki M .Eur.Phys.J.,1999,C6:649—654 3. Afanasiev S V et al(NA49 Collab.).Phys.Rev.Lett.,2001,86:1965—19694. Jeon S ,Koch V .Phys.Rev.Lett.,1999,83:5435—5438;2000,85:2076—2079 5. Asakawa M ,HeinzU ,M#252;ller B .Phys.Rev.Lett.,2000,85:2072—2075 6. Bass S A et al.Prog.Part.Nucl.Phys.,1998,41:255—370;nuclth9803035 7. Bleicher M ,JeonS ,Koch V .peh ph0006201 8. Friese V .New Resultsfrom NA 49.In:BAIYT ,YUML ,WU Y Fed.ⅩⅩⅩⅠInternational Symposiumon Multiparticle Dynamics.(2001 Datong,China)Singapore:World Scientific,2002.123—126 9. SA Ben-Hao,TAI An,WANG Hui et al.Phys.Rev.,1999,59:2728—2733;SA Ben-Hao,TAI An,Phys.Rev.,2000,C62:044905—044909 10. Sj#246;str and T .Comput.Phys.Commun.,1994,82:74—90 11. Cugnon J,Mizutain T ,Vandermeulen J.Nucl.Phys.,1981,A352:505—534 12. Bertsch G F ,Das Gupta S .Phys.Rep.,1988,160:189—233;Bonasera A ,Gulminelli F ,Molitoris J.Phys.Rep.,1994,243:1—124 13. TAI An,SA Ben-Hao.Comput.Phys.Commun.,1999,116:353—365

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ZHOU Dai-Mei, CAI Xu, LIU Zhi-Yi, LU Zhong-Dao and SA Ben-Hao. Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions[J]. Chinese Physics C, 2002, 26(12): 1271-1276.

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Received: 2002-01-08
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions

Corresponding author: ZHOU Dai-Mei,

Institute of Particle Physics,Huazhong Normal University,Wuhan 430079,China2 China Institute of Atomic Energy,Beijing 102413,China

Received Date: 2002-01-08
Accepted Date: 1900-01-01
Available Online: 2002-12-05

Abstract: Using a hadron and string cascade model,JPCIAE,and the corresponding Monte Carlo events generator,the behavior of the charged particle ratio event-by-event fluctuations in subsystem depending on energy,centrality,resonance decay and rapidity interval was investigated for Pb+Pb collisions at SPS and ALICE energies,and for Au+Au collisions at RHIC energies. The model results of charged particle ratio event-by-event fluctuations as a function of the rapidity interval in Pb+Pb collisions at SPS energies were comparable with the preliminary NA49 data. It turned out that the charged particle ratio fluctuation has no strong energy,centrality,resonance decay and rapidity interval dependences.