ρ0 production and possible modification in Au+Au and p+p collisions at √SNN=200 GeV -: art. no. 092301

被引：182

作者：

Adams, J ^{[1
]}

Adler, C

Aggarwal, MM

Ahammed, Z

Amonett, J

Anderson, BD

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

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

Carroll, J

Castillo, J

Cebra, D

Chaloupka, P

Chattopadhyay, S

Chen, HF

Chen, Y

Chernenko, SP

Cherney, M

Chikanian, A

Christie, W

Coffin, JP

Cormier, TM

Cramer, JG

Crawford, HJ

Das, D

Das, S

机构：

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

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

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

[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] CALTECH, Pasadena, CA 91125 USA

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

[9] Creighton Univ, Omaha, NE 68178 USA

[10] Nucl Phys Inst AS CR, Rez, Czech Republic

[11] Lab High Energy JINR, Dubna, Russia

[12] Particle Phys Lab JINR, Dubna, Russia

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

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

[15] Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA

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

[17] Inst Rech Subatom, Strasbourg, France

[18] Univ Jammu, Jammu 180001, India

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

[20] Lawrence Berkeley Lab, Berkeley, CA 94720 USA

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

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

[23] Moscow Phys Engn Inst, Moscow, Russia

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

[25] NIKHEF, Amsterdam, Netherlands

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

[27] Panjab Univ, Chandigarh 160014, India

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

[29] Inst High Energy Phys, Protvino, Russia

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

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

[32] Rice Univ, Houston, TX 77251 USA

[33] Univ Sao Paulo, Sao Paulo, Brazil

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

[35] Acad Sinica, Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China

[36] SUBATECH, Nantes, France

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

[38] Univ Texas, Austin, TX 78712 USA

[39] Valparaiso Univ, Valparaiso, IN 46383 USA

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

[41] Warsaw Univ Technol, Warsaw, Poland

[42] Univ Washington, Seattle, WA 98195 USA

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 09期

基金：

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

关键词：

D O I：

10.1103/PhysRevLett.92.092301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report results on rho(770)(0)-->pi(+)pi(-) production at midrapidity in p+p and peripheral Au+Au collisions at roots(NN)=200 GeV. This is the first direct measurement of rho(770)(0)-->pi(+)pi(-) in heavy-ion collisions. The measured rho(0) peak in the invariant mass distribution is shifted by similar to40 MeV/c(2) in minimum bias p+p interactions and similar to70 MeV/c(2) in peripheral Au+Au collisions. The rho(0) mass shift is dependent on transverse momentum and multiplicity. The modification of the rho(0) meson mass, width, and shape due to phase space and dynamical effects are discussed.

引用

页码：092301 / 1

页数：6

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