Ratios of charged antiparticles to particles near midrapidity in Au+Au collisions at √sNN=200 GeV -: art. no. 021901

被引：27

作者：

Back, BB

Baker, MD

Barton, DS

Betts, RR

Ballintijn, M

Bickley, AA

Bindel, R

Budzanowski, A

Busza, W

Carroll, A

Decowski, MP

Garcia, E

George, N

Gulbrandsen, K

Gushue, S

Halliwell, C

Hamblen, J

Heintzelman, GA

Henderson, C

Hofman, DJ

Hollis, RS

Holynski, R

Holzman, B

Iordanova, A

Johnson, E

Kane, JL

Katzy, J

Khan, N

Kucewicz, W

Kulinich, P

Kuo, CM

Lin, WT

Manly, S

McLeod, D

Michalowski, J

Mignerey, AC

Nouicer, R

Olszewski, A

Pak, R

Park, IC

Pernegger, H

Reed, C

Remsberg, LP

Reuter, M

Roland, C

Roland, G

Rosenberg, L

Sagerer, J

Sarin, P

Sawicki, P

机构：

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

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

[3] Inst Nucl Phys, 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 | 2003年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.67.021901

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：

The ratios of charged antiparticles to particles have been obtained for pions, kaons, and protons near midrapidity in central Au+Au collisions at roots(NN)=200 GeV. Ratios of <pi(-)>/<pi(+)>=1.025+/-0.006(stat.)+/-0.018(syst.), <K->/<K+>=0.95+/-0.03(stat.)+/-0.03(syst.), and [(p) over bar]/<p>=0.73+/-0.02(stat.)+/-0.03(syst.) have been observed. The <K->/<K+> and <(p) over bar >/<p> ratios are consistent with a baryochemical potential mu(B) of 27 MeV, roughly a factor of 2 smaller than in roots(NN)=130 GeV collisions. The data are compared to results from lower energies and model calculations. Our accurate measurements of the particle ratios impose stringent constraints on current and future models dealing with baryon production and transport.

引用

页码：219011 / 219015

页数：5

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