Dilepton production and mT-scaling at BEVALAC/SIS energies

被引：63

作者：

Bratkovskaya, EL ^{[1
]}

Cassing, W

Rapp, R

Wambach, J

机构：

[1] Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany

[2] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[3] TU Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

NUCLEAR PHYSICS A | 1998年 / 634卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

relativistic heavy-ion collisions; leptons;

D O I：

10.1016/S0375-9474(98)00135-3

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present a dynamical study of e(+)e(-) production in C+C and Ca+Ca collisions at BEVALAC/SIS energies on the basis of the covariant transport approach HSD employing momentum-dependent rho-meson spectral functions that include the pion modifications in the nuclear medium as well as the polarization of the rho-meson due to resonant rho-N scattering. We find that the experimental data from the DLS Collaboration cannot be described within the rho-meson spectral Function approach. A dropping eta-mass scenario leads to a good reproduction of the DLS dilepton data, however, violates the m(T)-scaling of pi(0) and eta spectra as observed by the TAPS Collaboration as well as eta photoproduction on nuclei. (C) 1998 Elsevier Science B.V.

引用

页码：168 / 189

页数：22

共 72 条

[1]

Abreu MC, 1996, NUCL PHYS A, V610, pC404

[2] EFFECTS OF PAIR CORRELATIONS IN STATISTICAL GAMMA-DECAY SPECTRA [J].

DOSSING, T ;

KHOO, TL ;

LAURITSEN, T ;

AHMAD, I ;

BLUMENTHAL, D ;

CARPENTER, MP ;

CROWELL, B ;

GASSMANN, D ;

HENRY, RG ;

JANSSENS, RVF ;

NISIUS, D .

PHYSICAL REVIEW LETTERS, 1995, 75 (07) :1276-1279

[3]

Agakichiev G, 1996, NUCL PHYS A, V610, pC317

[4] LOW-MASS LEPTON-PAIR PRODUCTION IN P-BE COLLISIONS AT 450 GEV/C [J].

AKESSON, T ;

ALMEHED, S ;

ANGELIS, ALS ;

ANTOS, J ;

ATHERTON, H ;

AUBRY, P ;

BARTELS, HW ;

BEAUDOIN, G ;

BEAULIEU, JM ;

BEKER, H ;

BENARY, O ;

BETTONI, D ;

BISI, V ;

BLEVIS, I ;

BOGGILD, H ;

CLELAND, W ;

CLEMEN, M ;

COLLICK, B ;

CORRIVEAU, F ;

DAGAN, S ;

DEDERICHS, K ;

DEPOMMIER, P ;

DIGIACOMO, N ;

DILIBERTO, S ;

DODD, JR ;

DOLGOSHEIN, B ;

DREES, A ;

EIDELMAN, S ;

ENYO, H ;

ERLANDSSON, B ;

ESTEN, MJ ;

FABJAN, CW ;

FISCHER, P ;

GAIDOT, A ;

GIBRATDEBU, F ;

GIUBELLINO, P ;

GLASSEL, P ;

GOERLACH, U ;

GOLUBKOV, Y ;

HAGLUND, R ;

HAMEL, LA ;

VANHECKE, H ;

HEDBERG, V ;

HEIFETZ, R ;

HOLSCHER, A ;

JACAK, B ;

JARLSKOG, G ;

JOHANNSON, S ;

KRANER, H ;

KROH, V .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1995, 68 (01) :47-64

[5]

APPENHEIMER M, 1996, GSI ANN REPORT, P58

[6] RHO MESON IN DENSE HADRONIC MATTER [J].

ASAKAWA, M ;

KO, CM ;

LEVAI, P ;

QIU, XJ .

PHYSICAL REVIEW C, 1992, 46 (04) :R1159-R1162

[7] Production of pi(0) and eta mesons in carbon-induced relativistic heavy-ion collisions [J].

Averbeck, R ;

Doppenschmidt, A ;

Appenheimer, M ;

Charbonnier, Y ;

Diaz, J ;

Hejny, V ;

Hlavac, S ;

Holzmann, R ;

Kugler, A ;

Lefevre, F ;

Lohner, H ;

Marin, A ;

Metag, V ;

Niebur, W ;

Ostendorf, RW ;

Pleskac, R ;

Schubert, A ;

Schutz, Y ;

Siemssen, H ;

Simon, RS ;

Stratmann, R ;

Stroher, H ;

Tlusty, P ;

Vogt, PH ;

Wagner, V ;

Weiss, J ;

Wilschut, HW ;

Wissmann, F ;

Wolf, AR ;

Wolf, M .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1997, 359 (01) :65-73

[8] THE PRODUCTION OF J/PSI IN 200 GEV-NUCLEON OXYGEN-URANIUM INTERACTIONS [J].

BAGLIN, C ;

BUSSIERE, A ;

GUILLAUD, JP ;

OGREN, H ;

STALEY, F ;

BALDIT, A ;

CASTOR, J ;

DEVAUX, A ;

FARGEIX, J ;

FELGEYROLLES, X ;

FORCE, P ;

FREDJ, L ;

LANDAUD, G ;

SONDEREGGER, P ;

ABREU, MC ;

BARREIRA, GP ;

BORDALO, P ;

CASACA, A ;

FERRAZ, A ;

FERREIRA, R ;

GAGO, JM ;

GOMES, P ;

LOURENCO, C ;

MAIO, A ;

PERALTA, L ;

PIMENTA, M ;

RAMOS, S ;

VARELA, J ;

GERSCHEL, C ;

SINQUIN, A ;

BORENSTEIN, S ;

BUSSON, P ;

CHARLOT, C ;

CHAURAND, B ;

KLUBERG, L ;

ROMANA, A ;

SALMERON, RA ;

BRITZ, J ;

GORODETZKY, P ;

KRAUS, L ;

LINCK, I ;

RACCA, C ;

CASES, R ;

ALIMI, M ;

BEDJIDIAN, M ;

CONTARDO, D ;

DESCROIX, E ;

DRAPIER, O ;

GROSSIORD, JY ;

GUICHARD, A .

PHYSICS LETTERS B, 1989, 220 (03) :471-478

[9] TRANSVERSE-MOMENTUM OF J/PSI PRODUCED IN OXYGEN URANIUM COLLISIONS AT 200 GEV PER NUCLEON [J].

BAGLIN, C .

PHYSICS LETTERS B, 1990, 251 (03) :465-471

[10] TRANSVERSE-MOMENTUM DISTRIBUTIONS OF ETA-MESONS IN NEAR-THRESHOLD RELATIVISTIC HEAVY-ION REACTIONS [J].

BERG, FD ;

PFEIFFER, M ;

SCHWALB, O ;

FRANKE, M ;

KUHN, W ;

LOHNER, H ;

METAG, V ;

NOTHEISEN, M ;

NOVOTNY, R ;

RASCHKE, AE ;

RITMAN, J ;

ROBIGLANDAU, M ;

SIMON, RS ;

SUMBERA, M ;

VENEMA, L ;

WILSCHUT, H .

PHYSICAL REVIEW LETTERS, 1994, 72 (07) :977-980

← 1 2 3 4 5 6 7 8 →