MULTISTEP PRODUCTION OF ETA-MESON AND HARD PI(0) MESON IN SUBTHRESHOLD AU-AU COLLISIONS

Authors
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
Citation
Ar. Wolf et al., MULTISTEP PRODUCTION OF ETA-MESON AND HARD PI(0) MESON IN SUBTHRESHOLD AU-AU COLLISIONS, Physical review letters, 80(24), 1998, pp. 5281-5284
Citations number
17
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
24
Year of publication
1998
Pages
5281 - 5284
Database
ISI
SICI code
0031-9007(1998)80:24<5281:MPOEAH>2.0.ZU;2-S
Abstract
The neutral pi(o) and eta mesons are studied in Au-197-Au-197 collisio ns at an incident energy of 800A MeV, substantially below the threshol d for eta production in N-N collisions. While the gross pi(o) multipli city 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 transv erse-mass excess [m(t)] - (root s - 2m(N)) of the mesons and is insens itive to their final-state interaction in the nuclear medium.