Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
ENHANCED PRODUCTION OF LOW-MASS ELECTRON PAIRS IN 200-GEV NUCLEON S-AU COLLISIONS AT THE CERN SUPER PROTON SYNCHROTRON/
Autore:
AGAKICHIEV G; BAUR R; BRESKIN A; CHECHIK R; DREES A; JACOB C; FASCHINGBAUER U; FISCHER P; FRAENKEL Z; FUCHS C; GATTI E; GLASSEL P; GUNZEL T; HEROS CPD; HESS F; IRMSCHER D; LENKEIT B; OLSEN LH; PANEBRATTSEV Y; PFEIFFER A; RAVINOVICH I; REHAK P; SCHON A; SCHUKRAFT J; SAMPIETRO M; SHIMANSKY S; SHOR A; SPECHT HJ; STEINER V; TAPPROGGE S; TELZUR G; TSERRUYA I; ULLRICH T; WURM JP; YUREVICH V;
Indirizzi:
MAX PLANCK INST KERNPHYS D-69117 HEIDELBERG GERMANY UNIV HEIDELBERG,INST PHYS D-69120 HEIDELBERG GERMANY WEIZMANN INST SCI IL-76100 REHOVOT ISRAEL POLITECN MILAN I-20133 MILAN ITALY BROOKHAVEN NATL LAB UPTON NY 11973 CERN CH-1211 GENEVA 23 SWITZERLAND
Titolo Testata:
Physical review letters
fascicolo: 7, volume: 75, anno: 1995,
pagine: 1272 - 1275
SICI:
0031-9007(1995)75:7<1272:EPOLEP>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
G. Agakichiev et al., "ENHANCED PRODUCTION OF LOW-MASS ELECTRON PAIRS IN 200-GEV NUCLEON S-AU COLLISIONS AT THE CERN SUPER PROTON SYNCHROTRON/", Physical review letters, 75(7), 1995, pp. 1272-1275

Abstract

We report on measurements of low-mass electron pairs in 450 GeV p-Be,p-Au, and 200 GeV/nucleon S-Au collisions at central rapidities. For the proton induced interactions, the low-mass spectra are, within the systematic errors, satisfactorily explained by electron pairs from hadron decays, whereas in the S-Au system an enhancement over the hadronic contributions by a factor of 5.0 +/- 0.7(stat) +/- 2.0(syst) in the invariant mass range 0.2 < m < 1.5 GeV/c(2) is observed. The properties of the excess suggest that it arises from two-pion annihilation pi pi --> e(+)e(-).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 05:03:53