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Titolo:
BACKWARD YIELDS OF PIONS, PROTONS, AND DEUTERONS IN RELATIVISTIC SI-28+PB COLLISIONS AT 14.6 A GEV C/
Autore:
BARRETTE J; BELLWIED R; BENNETT S; BRAUNMUNZINGER P; CLELAND WE; CORMIER TM; DAVID G; DEE J; DIEBOLD GE; DIETZSCH O; GERMANI JV; GILBERT S; GREENE SV; HALL JR; HEMMICK TK; HERRMANN N; HONG B; JAYANANDA K; KRAUS D; KUMAR BS; LACASSE R; LI Q; LISSAUER D; LLOPE WJ; LUDLAM TW; LUKASZEW A; MAJKA R; MARK SK; MATHEUS R; MCCORKLE S; MITCHELL JT; MUTHUSWAMY M; OBRIEN E; PANITKIN S; PRUNEAU C; RAO MN; ROSATI M; ROTONDO F; DASILVA NC; SONNADARA U; STACHEL J; TAKAI H; TAKAGUI EM; THROWE TG; VOLOSHIN S; WANG G; WOLFE D; WOODY CL; XU N; ZHANG Y; ZHANG Z; ZOU C;
Indirizzi:
BROOKHAVEN NATL LAB UPTON NY 11973 GESELL SCHWERIONENFORSCH GMBH DARMSTADT GERMANY MCGILL UNIV MONTREAL PQ CANADA UNIV NEW MEXICO ALBUQUERQUE NM 87131 UNIV PITTSBURGH PITTSBURGH PA 15260 SUNY STONY BROOK STONY BROOK NY 11794 UNIV SAO PAULO SAO PAULO BRAZIL WAYNE STATE UNIV DETROIT MI 48202 YALE UNIV NEW HAVEN CT 06520
Titolo Testata:
Nuclear physics. A
fascicolo: 3, volume: 622, anno: 1997,
pagine: 391 - 403
SICI:
0375-9474(1997)622:3<391:BYOPPA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-NUCLEUS COLLISIONS; AGS;
Keywords:
RELATIVISTIC HEAVY-ION COLLISION; BACKWARD HEMISPHERE; AGS SI+PB;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
J. Barrette et al., "BACKWARD YIELDS OF PIONS, PROTONS, AND DEUTERONS IN RELATIVISTIC SI-28+PB COLLISIONS AT 14.6 A GEV C/", Nuclear physics. A, 622(3), 1997, pp. 391-403

Abstract

The production of pions, protons and deuterons is studied at a laboratory angle of 144 degrees in Si-28 + Pb collisions at 14.6 GeV/c per nucleon. The centrality dependence of the pion yields is studied over the full impact parameter range using a zero degree calorimeter. The results are compared with the hadronic cascade model RQMD. These calculations are generally in agreement with the experimental results. According to these calculations, the pion yield in our acceptance is completely dominated by Delta-decay at freeze-out. Our measurements thus support the importance of baryon resonance production as one of the central features of relativistic heavy ion collisions at AGS energies. Although the strength of the pion spectrum is adequately described for kinetic energies above 50 MeV, an additional very soft component is observed in the pion spectra which is not predicted by RQMD. This very soft component accounts for a significant fraction of the total pion yield in this rapidity range but remains unexplained. (C) 1997 Elsevier Science B.V.

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Documento generato il 01/12/20 alle ore 13:36:10