Identified charged antiparticle to particle ratios near midrapidity in Cu plus Cu collisions at √sNN=62.4 and 200 GeV

被引：10

作者：

Alver, B. ^{[4
]}

Back, B. B. ^{[1
]}

Baker, M. D. ^{[2
]}

Ballintijn, M. ^{[4
]}

Barton, D. S. ^{[2
]}

Betts, R. R. ^{[6
]}

Bindel, R. ^{[7
]}

Busza, W. ^{[4
]}

Chai, Z. ^{[2
]}

Chetluru, V. ^{[6
]}

Garcia, E. ^{[6
]}

Gburek, T. ^{[3
]}

Gulbrandsen, K. ^{[4
]}

Hamblen, J. ^{[8
]}

Harnarine, I. ^{[6
]}

Henderson, C. ^{[4
]}

Hofman, D. J. ^{[6
]}

Hollis, R. S. ^{[6
]}

Holynski, R. ^{[3
]}

Holzman, B. ^{[2
]}

Iordanova, A. ^{[6
]}

Kane, J. L. ^{[4
]}

Kulinich, P. ^{[4
]}

Kuo, C. M. ^{[5
]}

Li, W. ^{[4
]}

Lin, W. T. ^{[5
]}

Loizides, C. ^{[4
]}

Manly, S. ^{[8
]}

Mignerey, A. C. ^{[7
]}

Nouicer, R. ^{[2
]}

Olszewski, A. ^{[3
]}

Pak, R. ^{[2
]}

Reed, C. ^{[4
]}

Richardson, E. ^{[7
]}

Roland, C. ^{[4
]}

Roland, G. ^{[4
]}

Sagerer, J. ^{[6
]}

Sedykh, I. ^{[2
]}

Smith, C. E. ^{[6
]}

Stankiewicz, M. A. ^{[2
]}

Steinberg, P. ^{[2
]}

Stephans, G. S. F. ^{[4
]}

Sukhanov, A. ^{[2
]}

Szostak, A. ^{[2
]}

Tonjes, M. B. ^{[7
]}

Trzupek, A. ^{[3
]}

van Nieuwenhuizen, G. J. ^{[4
]}

Vaurynovich, S. S. ^{[4
]}

Verdier, R. ^{[4
]}

Veres, G. I. ^{[4
]}

机构：

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

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

[3] Inst Nucl Phys PAN, 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 C | 2008年 / 77卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevC.77.061901

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：

Antiparticle to particle ratios for identified protons, kaons, and pions at root s(NN) = 62.4 and 200 GeV in Cu+Cu collisions are presented as a function of centrality for the midrapidity region of 0.2 < eta < 1.4. No strong dependence on centrality is observed. For the <(p) over bar >/< p > ratio at < p(T)> approximate to 0.51 GeV/c, we observe an average value of 0.50 +/- 0.003((stat)) +/- 0.04((syst)) and 0.77 +/- 0.008((stat)) +/- 0.05((syst)) for the 10% most central collisions of 62.4 and 200 GeV Cu+Cu, respectively. The values for all three particle species measured at root s(NN) = 200 GeV are in agreement within systematic uncertainties with that seen in both heavier and lighter systems measured at the same RHIC energy. This indicates that system size does not appear to play a strong role in determining the midrapidity chemical freeze-out properties affecting the antiparticle to particle ratios of the three most abundant particle species produced in these collisions.

引用

页数：5

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