Centrality dependence of neutral pion production in 158A GeV 208Pb+208Pb collisions

被引：67

作者：

Aggarwal, MM ^{[1
]}

Agnihotri, A

Ahammed, Z

Angelis, ALS

Antonenko, V

Arefiev, V

Astakhov, V

Avdeitchikov, V

Awes, TC

Baba, PVKS

Badyal, SK

Baldine, A

Barabach, L

Barlag, C

Bathe, S

Batiounia, B

Bernier, T

Bhalla, KB

Bhatia, VS

Blume, C

Bock, R

Bohne, EM

Borocz, ZK

Bucher, D

Buijs, A

Busching, H

Carlen, L

Chalyshev, V

Chattopadhyay, S

Cherbatchev, R

Chujo, T

Claussen, A

Das, AC

Decowski, MP

Djordjadze, V

Donni, P

Doubovik, I

Majumdar, MRD

El Chenawi, K

Eliseev, S

Enosawa, K

Foka, P

Fokin, S

Frolov, V

Ganti, MS

Garpman, S

Gavrishchuk, O

Geurts, FJM

Ghosh, TK

Glasow, R

机构：

[1] Panjab Univ, Chandigarh 160014, India

[2] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[3] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Calcutta 700064, W Bengal, India

[4] Univ Geneva, CH-1211 Geneva 4, Switzerland

[5] RRC Kurchatov, RU-123182 Moscow, Russia

[6] Joint Nucl Res Inst, RU-141980 Dubna, Russia

[7] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[8] Univ Jammu, Jammu 180001, India

[9] Univ Munster, D-48149 Munster, Germany

[10] Ecole Mines, SUBATECH, Nantes, France

[11] Gesell Schwerionenforsch Inst Darmstadt, D-64220 Darmstadt, Germany

[12] Univ Utrecht, NIKHEF, NL-3508 TA Utrecht, Netherlands

[13] Univ Lund, SE-22100 Lund, Sweden

[14] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[15] Nucl Res Inst, CZ-25068 Rez, Czech Republic

[16] Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands

[17] Inst Nucl Studies, PL-00681 Warsaw, Poland

[18] MIT, Cambridge, MA 02139 USA

[19] Inst Phys, Bhubaneswar 751005, Orissa, India

[20] Univ Tennessee, Knoxville, TN 37966 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.81.4087

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The production of neutral pions in 158A GeV Pb-208 + Pb-208 collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron (SPS). Transverse momentum spectra are studied for the range 0.3 less than or equal to m(T) - m(0) less than or equal to 4.0 GeV/c. The results for central collisions are compared to various models. The centrality dependence of the neutral pion spectral shape and yield is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with greater than about 30 participating nucleons. This is most naturally explained by assuming an equilibrated system. [S0031-9007(98)07532-2].

引用

页码：4087 / 4091

页数：5

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