Transverse momentum distributions of neutral pions from nuclear collisions at 200 AGeV

被引：49

作者：

Albrecht, R ^{[1
]}

Antonenko, V

Awes, TC

Barlag, C

Bloomer, MA

Blume, C

Bock, D

Bock, R

Bohne, EM

Bucher, D

Claussen, A

Clewing, G

Eklund, A

Fokin, S

Franz, A

Garpman, S

Geurts, F

Glasow, R

Gustafsson, HA

Gutbrod, HH

Holker, G

Idh, J

Ippolitov, M

Jacobs, P

Kamermans, R

Kampert, KH

Karadjev, K

Kolb, BW

Lebedev, A

Lohner, H

Lund, I

Manko, V

Nikolaev, S

Obenshain, FE

Oskarsson, A

Otterlund, I

Peitzmann, T

Plasil, F

Poskanzer, AM

Purschke, M

Ritter, HG

Saini, S

Santo, R

Schmidt, HR

Soderstrom, K

Sorensen, SP

Stankus, P

Steffens, K

Steinhaeuser, P

Stenlund, E

机构：

[1] Gesell Schwerionenforsch, D-64220 Darmstadt, Germany

[2] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia

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

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

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[6] Univ Lund, S-22362 Lund, Sweden

[7] Univ Utrecht, NIKHEF H, NL-3508 TA Utrecht, Netherlands

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

[9] Univ Tennessee, Knoxville, TN 37996 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 5卷 / 02期

关键词：

D O I：

10.1007/s100520050267

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

New results on transverse mass spectra of neutral pions measured at central rapidity are presented for impact parameter selected 200 A.GeV S + S and S + Au collisions. The distributions cover more than 8 orders of magnitude in cross section over the range 0.3 GeV/c less than or equal to p(T) less than or equal to 4.0 GeV/c. Detailed comparisons to results from pp collisions are made. The spectra from all systems show a clear power-law like shape with similar curvature. Collisions of S + Au exhibit a larger mean transverse momentum than pp increasing with centrality. Predictions of string models and by hydrodynamic approaches including collective expansion and decays of short lived resonances are compared to the data and the implications are discussed.

引用

页码：255 / 267

页数：13

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