Elliptic flow: Transition from out-of-plane to in-plane emission in Au plus Au collisions

被引：216

作者：

Pinkenburg, C ^{[1
]}

Ajitanand, NN

Alexander, JM

Anderson, M

Best, D

Brady, FP

Case, T

Caskey, W

Cebra, D

Chance, JL

Chung, P

Cole, B

Crowe, K

Das, AC

Draper, JE

Elmaani, A

Gilkes, ML

Gushue, S

Heffner, M

Hirsch, AS

Hjort, EL

Huo, L

Justice, M

Kaplan, M

Keane, D

Kintner, JC

Klay, J

Krofcheck, D

Lacey, RA

Lauret, J

Law, C

Lisa, MA

Liu, H

Liu, YM

McGrath, R

Milosevich, Z

Odyniec, G

Olson, DL

Panitkin, SY

Porile, NT

Rai, G

Ritter, HG

Romero, JL

Scharenberg, R

Schroeder, L

Srivastava, B

Stone, NTB

Symons, TJM

Whitfield, J

Wienold, T

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[2] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

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

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

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

[6] Univ Calif Davis, Davis, CA 95616 USA

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

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

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

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

[11] Ecole Mines, SUBATECH, F-44070 Nantes, France

[12] Univ Auckland, Auckland 1, New Zealand

[13] Columbia Univ, New York, NY 10027 USA

[14] St Marys Coll, Moraga, CA 94575 USA

[15] Harbin Inst Technol, Harbin 150001, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.83.1295

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the proton elliptic flow excitation function for the Au + Au system spanning the beam energy range (2-8)A GeV. The excitation function shows a transition from negative to positive elliptic flow at a beam energy, E-tr similar to 4A GeV. Detailed comparisons with calculations from a relativistic Boltzmann equation are presented. The comparisons suggest a softening of the nuclear equation of state from a stiff form (K similar to 380 MeV) at low beam energies (E-beam less than or equal to 2A GeV) to a softer form (K similar to 210 MeV) at higher energies (E-beam 4A GeV) where the calculated baryon density rho similar to 4 rho(0).

引用

页码：1295 / 1298

页数：4

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