Centrality dependence of charged hadron transverse momentum spectra in Au plus Au collisions from √sNN=62.4 to 200 GeV -: art. no. 082304

被引：57

作者：

Back, BB

Baker, MD

Ballintijn, M

Barton, DS

Betts, RR

Bickley, AA

Bindel, R

Busza, W

Carroll, A

Chai, Z

Decowski, MP

García, E

Gburek, T

George, N

Gulbrandsen, K

Halliwell, C

Hamblen, J

Hauer, M

Henderson, C

Hofman, DJ

Hollis, RS

Holynski, R

Holzman, B

Iordanova, A

Johnson, E

Kane, JL

Khan, N

Kulinich, P

Kuo, CM

Lin, WT

Manly, S

Mignerey, AC

Nouicer, R

Olszewski, A

Pak, R

Reed, C

Roland, C

Roland, G

Sagerer, J

Seals, H

Sedykh, I

Smith, CE

Stankiewicz, MA

Steinberg, P

Stephans, GSF

Sukhanov, A

Tonjes, MB

Trzupek, A

Vale, C

van Nieuwenhuizen, GJ

机构：

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

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

[3] PAN, Inst Phys Nucl, Krakow, Poland

[4] MIT, Cambridge, MA 02139 USA

[5] Natl Cent Univ, Chungli 32054, Taiwan

[6] Univ Illinois, Chicago, IL 60607 USA

[7] Univ Maryland, College Pk, MD 20742 USA

[8] Univ Rochester, Rochester, NY 14627 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.94.082304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured transverse momentum distributions of charged hadrons produced in Au+Au collisions at roots(NN) = 62.4 GeV. The spectra are presented for transverse momenta 0.25<p(T)<4.5 GeV/c, in a pseudorapidity range of 0.2<eta<1.4. The nuclear modification factor R-AA is calculated relative to p+p data at the same collision energy as a function of collision centrality. For 2<p(T)<4.5 GeV/c, R-AA is found to be significantly larger than in Au+Au collisions at roots(NN) = 130 and 200 GeV. In contrast to the large change in R-AA, we observe a very similar centrality evolution of the p(T) spectra at roots(NN) = 62.4 and 200 GeV. The dynamical origin of this surprising factorization of energy and centrality dependence of particle production in heavy-ion collisions remains to be understood.

引用

页数：4

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