Centrality dependence of p<SUB>T</SUB> spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s<SUB>NN</SUB>= 200GeV

WANG Yun-Fei; SHAO Feng-Lan; SONG Jun; WEI De-Ming; XIE Qu-Bing

doi:10.1088/1674-1137/32/12/007

Chinese Physics C> 2008, Vol. 32> Issue(12) : 976-983 DOI: 10.1088/1674-1137/32/12/007

Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV

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The centrality dependence of transverse momentum spectra for identified hadrons at midrapidity in Au+Au collisions at √s_NN= 200GeV is systematically studied in a quark combination model. The p_T spectra of π^±, K^±, p(p) and Λ(Λ) in different centrality bins and the nuclear modification factors (R_CP) for these hadrons are calculated. The centrality dependence of the average collective transverse velocity 〈β(r)〉 for the hot and dense quark matter is obtained in Au+Au collisions, and it is applied to a relative smaller Cu+Cu collision system. The centrality dependence of p_T spectra and the R_CP for π⁰, K_s⁰ and Λ in Cu+Cu collisions at √s_NN= 200GeV are well described. The results show that 〈β(r)〉 is only a function of the number of participants N_part and it is independent of the collision system.

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WANG Yun-Fei, SHAO Feng-Lan, SONG Jun, WEI De-Ming and XIE Qu-Bing. Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV[J]. Chinese Physics C, 2008, 32(12): 976-983. doi: 10.1088/1674-1137/32/12/007

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Received: 2008-04-01
Revised: 2008-06-11

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沈阳化工大学材料科学与工程学院沈阳 110142

Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV

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Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV

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Centrality dependence of pT spectra for identified hadrons in Au+Au and Cu+Cu collisions at √sNN= 200GeV

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通讯作者: 陈斌, bchen63@163.com

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Centrality dependence of pT spectra for identified hadrons in Au+Au and Cu+Cu collisions at √sNN= 200GeV

Corresponding author: SHAO Feng-Lan,

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Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV

Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV