Charged-particle multiplicity near midrapidity in central Au plus Au collisions at √sNN=56 and 130 GeV

被引：286

作者：

Back, BB ^{[1
]}

Baker, MD

Barton, DS

Basilev, S

Bates, BD

Baum, R

Betts, RR

Bialas, A

Bindel, R

Bogucki, W

Budzanowski, A

Busza, W

Carroll, A

Ceglia, M

Chang, YH

Chen, AE

Coghen, T

Conner, C

Czyz, W

Dabrowski, B

Decowski, MP

Despet, M

Fita, P

Fitch, J

Friedl, M

Galuszka, K

Ganz, R

Garcia, E

George, N

Godlewski, J

Gomes, C

Griesmayer, E

Gulbrandsen, K

Gushue, S

Halik, J

Halliwell, C

Haridas, P

Hayes, A

Heintzelman, GA

Henderson, C

Hollis, R

Holynski, R

Holzman, B

Johnson, E

Kane, J

Katzy, J

Kita, W

Kotula, J

Kraner, H

Kucewicz, W

机构：

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

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

[3] Brookhaven Natl Lab, CA Dept, Upton, NY 11973 USA

[4] Inst Nucl Phys, Krakow, Poland

[5] Jagiellonian Univ, Dept Phys, Krakow, Poland

[6] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[7] Natl Cent Univ, Dept Phys, Chungli 32054, Taiwan

[8] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[9] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[10] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[11] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

[12] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.85.3100

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first measurement of pseudorapidity densities of primary charged particles near midrapidity in Au + Au collisions at root S-NN = 56 and 130 GeV. For the most central collisions, we find the charged-particle pseudorapidity density to be dN/d eta/(/eta/<t) = 408 +/- 12(stat) +/- 30(syst) at 56 GeV and 555 +/- 12(stat) +/- 35(syst) at 130 GeV, values that are higher than any previously observed in nuclear collisions. Compared to proton-antiproton collisions, our data show an increase in the pseudorapidity density per participant by more than 40% at the higher energy.

引用

页码：3100 / 3104

页数：5

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