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Titolo:
LOW-MASS E(-) PAIR PRODUCTION IN 158 A GEV PB-AU COLLISIONS AT THE CERN SPS, ITS DEPENDENCE ON MULTIPLICITY AND TRANSVERSE-MOMENTUM()E()
Autore:
AGAKICHIEV G; BAUR R; BRAUNMUNZINGER P; CERETTO F; DREES A; ESUMI S; FASCHINGBAUER U; FRAENKEL Z; FUCHS C; GATTI E; GLASSEL P; DELOSHEROS CP; HOLL P; JUNG C; LENKEIT B; MESSER M; PANEBRATTSEV Y; PFEIFFER A; RAK J; RAVINOVICH I; RAZIN S; REHAK P; RICHTER M; SAMPIETRO M; SAVELJIC N; SCHUKRAFT J; SHIMANSKY S; SEIPP W; SOCOL E; SPECHT HJ; STACHEL J; TELZUR G; TSERRUYA I; ULLRICH T; VOIGT C; WEBER C; WESSELS JP; WIENOLD T; WURM JP; YUREVICH V;
Indirizzi:
JINR DUBNA RUSSIA UNIV HEIDELBERG D-6900 HEIDELBERG GERMANY GSI DARMSTADT D-6100 DARMSTADT GERMANY MAX PLANCK INST KERNPHYS D-69117 HEIDELBERG GERMANY WEIZMANN INST SCI IL-76100 REHOVOT ISRAEL POLITECN MILAN I-20133 MILAN ITALY BROOKHAVEN NATL LAB UPTON NY 11973 CERN GENEVA SWITZERLAND
Titolo Testata:
Physics letters. Section B
fascicolo: 1-4, volume: 422, anno: 1998,
pagine: 405 - 412
SICI:
0370-2693(1998)422:1-4<405:LEPPI1>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; SUPER PROTON SYNCHROTRON; DILEPTON PRODUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
G. Agakichiev et al., "LOW-MASS E(-) PAIR PRODUCTION IN 158 A GEV PB-AU COLLISIONS AT THE CERN SPS, ITS DEPENDENCE ON MULTIPLICITY AND TRANSVERSE-MOMENTUM()E()", Physics letters. Section B, 422(1-4), 1998, pp. 405-412

Abstract

We report a measurement of low-mass electron pairs observed in 158 GeV/nucleon Pb-Au collisions. The pair yield integrated over the range of invariant masses 0.2 less than or equal to m less than or equal to 2.0 GeV/c(2) is enhanced by a factor of 3.5 +/- 0.4 (stat) +/- 0.9 (syst) over the expectation from neutral meson decays. As observed previously in S-Au collisions, the enhancement is most pronounced in the invariant-mass region 300-700 MeV/c(2). For Pb-Au we find evidence for a strong increase of the enhancement with centrality. In addition, we show that the enhancement covers a wide range in transverse momentum, butis largest at the lowest observed p(perpendicular to). (C) 1998 Published by Elsevier Science B.V.

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Documento generato il 01/10/20 alle ore 07:29:34