Rapidity and centrality dependence of proton and antiproton production from 197Au+197Au collisions at √SNN=130 GeV -: art. no. 041901

被引：22

作者：

Adams, J

Adler, C

Aggarwal, MM

Ahammed, Z

Amonett, J

Anderson, BD

Anderson, M

Arkhipkin, D

Averichev, GS

Badyal, SK

Balewski, J

Barannikova, O

Barnby, LS

Baudot, J

Bekele, S

Belaga, VV

Bellwied, R

Berger, J

Bezverkhny, BI

Bhardwaj, S

Bhaskar, P

Bhati, AK

Bichsel, H

Billmeier, A

Bland, LC

Blyth, CO

Bonner, BE

Botje, M

Boucham, A

Brandin, A

Bravar, A

Cadman, RV

Cai, XZ

Caines, H

Sánchez, MCD

Cardenas, A

Carroll, J

Castillo, J

Castro, M

Cebra, D

Chaloupka, P

Chattopadhyay, S

Chen, HF

Chen, Y

Chernenko, SP

Cherney, M

Chikanian, A

Choi, B

Christie, W

Coffin, JP

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Brookhaven Natl Lab, Upton, NY 11973 USA

[3] Univ Birmingham, Birmingham, W Midlands, England

[4] Univ Calif Berkeley, Berkeley, CA 94720 USA

[5] Univ Calif Davis, Davis, CA 95616 USA

[6] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[7] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[8] Creighton Univ, Omaha, NE 68178 USA

[9] Nucl Phys Inst AS CR, Prague, Czech Republic

[10] Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia

[11] Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia

[12] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[13] Indiana Univ, Bloomington, IN 47408 USA

[14] Inst Rech Subatom, Strasbourg, France

[15] Kent State Univ, Kent, OH 44242 USA

[16] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[17] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[18] Michigan State Univ, E Lansing, MI 48824 USA

[19] Moscow Engn Phys Inst, Moscow, Russia

[20] CUNY City Coll, New York, NY 10031 USA

[21] NIKHEF, Amsterdam, Netherlands

[22] Ohio State Univ, Columbus, OH 43210 USA

[23] Penn State Univ, University Pk, PA 16802 USA

[24] Inst High Energy Phys, Protvino, Russia

[25] Purdue Univ, W Lafayette, IN 47907 USA

[26] Rice Univ, Houston, TX 77251 USA

[27] Univ Sao Paulo, Sao Paulo, Brazil

[28] Univ Sci & Technol China, Anhui 230027, Peoples R China

[29] Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China

[30] SUBATECH, Nantes, France

[31] Texas A&M Univ, College Stn, TX 77843 USA

[32] Univ Texas, Austin, TX 78712 USA

[33] Valparaiso Univ, Valparaiso, IN 46383 USA

[34] Variable Energy Cyclotron Ctr, Kolkata 700064, W Bengal, India

[35] Warsaw Univ Technol, Warsaw, Poland

[36] Univ Washington, Seattle, WA 98195 USA

[37] Wayne State Univ, Detroit, MI 48201 USA

[38] CCNU, HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[39] Yale Univ, New Haven, CT 06520 USA

[40] Panjab Univ, Chandigarh 160014, India

[41] Univ Jammu, Jammu 180001, India

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

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

来源：

PHYSICAL REVIEW C | 2004年 / 70卷 / 04期

基金：

中国国家自然科学基金; 巴西圣保罗研究基金会; 英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevC.70.041901

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We report on the rapidity and centrality dependence of proton and antiproton transverse mass distributions from Au-197+Au-197 collisions at roots(NN)=130 GeV as measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Our results are from the rapidity and transverse momentum range of parallel toyparallel to<0.5 and 0.35<p(t)<1.00 GeV/c. For both protons and antiprotons, transverse mass distributions become more convex from peripheral to central collisions demonstrating characteristics of collective expansion. The measured rapidity distributions and the mean transverse momenta versus rapidity are flat within \y\<0.5. Comparisons of our data with results from model calculations indicate that in order to obtain a consistent picture of the proton (antiproton) yields and transverse mass distributions the possibility of prehadronic collective expansion may have to be taken into account.

引用

页码：041901 / 1

页数：6

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