Multistep production of η and hard π0 mesons in subthreshold Au-Au collisions

被引：14

作者：

Wolf, AR

Appenheimer, M

Averbeck, R

Charbonnier, Y

Diaz, J

Doppenschmidt, A

Hejny, V

Hlavac, S

Holzmann, R

Kugler, A

Lohner, H

Marin, A

Metag, V

Novotny, R

Ostendorf, RW

Pleskac, R

Schubert, A

Schutz, Y

Simon, RS

Stratmann, R

Stroher, H

Tlusty, P

Vogt, PH

Wagner, V

Weiss, J

Wilschut, HW

Wissmann, F

Wolf, M

机构：

[1] Slovak Acad Sci, SK-84228 Bratislava, Slovakia

[2] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[3] Gesell Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[4] Grand Accelerateur Natl Ions Lourds, F-14021 Caen, France

[5] Univ Valencia, CSIC, Ctr Mixto, Inst Fis Corpuscular, E-46100 Burjassot, Spain

[6] Univ Frankfurt, Inst Fis Corpuscular, D-60486 Frankfurt, Germany

[7] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic

[8] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.80.5281

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The neutral pi(o) and eta mesons are studied in Au-197-Au-197 collisions at an incident energy of 800A MeV, substantially below the threshold for eta production in N-N collisions. While the gross pi(o) multiplicity increases almost linearly with the number of participant nucleons, the multiplicities of eta and hard pi(o) mesons show a stronger than linear dependence. The nonlinearity is governed by the average transverse-mass excess [m(t)] - (root s - 2m(N)) of the mesons and is insensitive to their final-state interaction in the nuclear medium.

引用

页码：5281 / 5284

页数：4

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