Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at √SNN=200GeV

被引：133

作者：

Adams, J ^{[1
]}

Aggarwal, MM

Ahammed, Z

Amonett, J

Anderson, BD

Arkhipkin, D

Averichev, GS

Badyal, SK

Bai, Y

Balewski, J

Barannikova, O

Barnby, LS

Baudot, J

Bekele, S

Belaga, VV

Bellwied, R

Berger, J

Bezverkhny, BI

Bharadwaj, S

Bhasin, A

Bhati, AK

Bhatia, VS

Bichsel, H

Bielcik, J

Bielcikova, J

Billmeier, A

Bland, LC

Blyth, CO

Bonner, BE

Botje, M

Boucham, A

Brandin, AV

Bravar, A

Bystersky, M

Cadman, R

Cai, XZ

Caines, H

Sánchez, MCD

Castillo, J

Catu, O

Cebra, D

Chajecki, Z

Chaloupka, R

Chattopadhyay, S

Chen, HF

Chen, Y

Cheng, J

Cherney, M

Chikanian, A

Christie, W

机构：

[1] Univ Birmingham, Birmingham B15 2TT, W Midlands, England

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

[3] Univ Bern, CH-3012 Bern, Switzerland

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

[5] CALTECH, Pasadena, CA 91125 USA

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

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

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

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

[10] Creighton Univ, Omaha, NE 68178 USA

[11] Acad Sci Czech Republ, Inst Nucl Phys, CR-25068 Rez, Czech Republic

[12] Lab High Energy, JINR, Dubna, Russia

[13] Particle Phys Lab, JINR, Dubna, Russia

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

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

[16] Indian Inst Technol, Bombay 400076, Maharashtra, India

[17] Indiana Univ, Bloomington, IN 47408 USA

[18] Inst Rech Subatom, Strasbourg, France

[19] Univ Jammu, Jammu 180001, India

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

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

[22] MIT, Cambridge, MA 02139 USA

[23] Max Planck Inst Phys & Astrophys, Munich, Germany

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

[25] Moscow Engn Phys Inst, Moscow 115409, Russia

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

[27] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

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

[29] Panjab Univ, Chandigarh 160014, India

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

[31] Inst High Energy Phys, Protvino, Russia

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

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

[34] Rice Univ, Houston, TX 77251 USA

[35] Univ Sao Paulo, BR-05508 Sao Paulo, Brazil

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

[37] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[38] SUBATECH, Nantes, France

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

[40] Univ Texas, Austin, TX 78712 USA

[41] Tsinghua Univ, Beijing 100084, Peoples R China

[42] Valparaiso Univ, Valparaiso, IN 46383 USA

[43] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India

[44] Warsaw Univ Technol, Warsaw, Poland

[45] Univ Washington, Seattle, WA 98195 USA

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

[47] Hua Zhong Normal Univ, Inst Particle Phys, CCNU, Wuhan 430079, Peoples R China

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

[49] Univ Zagreb, HR-10002 Zagreb, Croatia

来源：

PHYSICS LETTERS B | 2005年 / 616卷 / 1-2期

基金：

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

关键词：

D O I：

10.1016/j.physletb.2005.04.041

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Identified mid-rapidity particle spectra of pi(+/-), K+/-, and p((p) over bar) from 200 GeV p + p and d + Au collisions are reported. A time-of-flight detector based on multi-gap resistive plate chamber technology is used for particle identification. The particle-species dependence of the Cronin effect is observed to be significantly smaller than that at lower energies. The ratio of the nuclear modification factor (R-dAu) between protons (p + (p) over bar) and charged hadrons (h) in the transverse momentum range 1.2 < p(T) < 3.0 GeV/c is measured to be 1.19 +/- 0.05(stat) +/- 0.03(syst) in minimum-bias collisions and shows little centrality dependence. The yield ratio of (p + (p) over bar)/h in minimum-bias d + Au collisions is found to be a factor of 2 lower than that in Au + Au collisions, indicating that the Cronin effect alone is not enough to account for the relative baryon enhancement observed in heavy ion collisions at RHIC. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：8 / 16

页数：9

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