Analysis of the HELIOS-3 mu(+)mu(-) data within a relativistic transport approach

被引：69

作者：

Cassing, W ^{[1
]}

Ehehalt, W ^{[1
]}

Kralik, I ^{[1
]}

机构：

[1] SLOVAK ACAD SCI, INST EXPTL PHYS, SR-04353 KOSICE, SLOVAKIA

来源：

PHYSICS LETTERS B | 1996年 / 377卷 / 1-3期

关键词：

relativistic heavy-ion collisions; leptons;

D O I：

10.1016/0370-2693(96)00291-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a nonperturbative dynamical study of mu(+)mu(-) production in proton-nucleus and nucleus-nucleus collisions at SPS energies on the basis of the covariant transport approach HSD. For p + W reactions at 200 GeV bombarding energy the dimuon yield for invariant masses m less than or equal to 1.6 GeV is found to be dominated by the decays of the eta, rho, omega and phi mesons. For 200 GeV/A S + W collisions, however, the dimuon yield shows an additional large contribution from pi(+)pi(-), K+K- and pi rho channels. We find that for 'free' meson masses and form factors the experimental cross section is clearly underestimated for S + W in the invariant mass range 0.35 GeV less than or equal to m less than or equal to 0.65 GeV and that the HELIOS3 data can only be reproduced within a hadronic scenario, if the rho/omega-meson mass drops with baryon density. This finding suggests a partial restoration of chiral symmetry in S + W collisions at SPS energies.

引用

页码：5 / 10

页数：6

共 41 条

[1] 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

[2] 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

[3]

[Anonymous], COMMUNICATION

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

ASAKAWA, M ;

KO, CM ;

LEVAI, P ;

QIU, XJ .

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

[5] MEDIUM EFFECTS ON THE RHO-MESON [J].

ASAKAWA, M ;

KO, CM .

PHYSICAL REVIEW C, 1993, 48 (02) :R526-R529

[6] QCD SUM-RULES FOR A RHO-MESON IN DENSE MATTER [J].

ASAKAWA, M ;

KO, CM .

NUCLEAR PHYSICS A, 1993, 560 (01) :399-410

[7] PHI-PRODUCTION, RHO-PRODUCTION, AND OMEGA-PRODUCTION IN P-U, O-U AND S-U REACTIONS AT 200 GEV PER NUCLEON [J].

BAGLIN, C ;

BALDISSERI, A ;

BUSSIERE, A ;

GUILLAUD, JP ;

KOSSAKOWSKI, R ;

LIAUD, P ;

STALEY, F ;

BALDIT, A ;

CASTOR, J ;

CHAMBON, T ;

DEVAUX, A ;

FARGEIX, J ;

FELGEYROLLES, X ;

FORCE, P ;

FREDJ, L ;

LANDAUD, G ;

VAZEILLE, F ;

SONDEREGGER, P ;

ABREU, MC ;

BORDALO, P ;

FERREIRA, R ;

GAGO, JM ;

LOURENCO, C ;

PERALTA, L ;

RAMOS, S ;

SILVA, S ;

VARELA, J ;

GERSCHEL, C ;

JOUAN, D ;

PAPILLON, S ;

TARRAGO, X ;

BUSSON, P ;

CHARLOT, C ;

CHAURAND, B ;

KLUBERG, L ;

ROMANA, A ;

GORODETZKY, P ;

GROSDIDIER, B ;

RACCA, C ;

CASES, R ;

BEDJIDIAN, M ;

CONTARDO, D ;

DESCROIX, E ;

DRAPIER, O ;

GROSSIORD, JY ;

GUICHARD, A ;

HAROUTUNIAN, R ;

PIZZI, JR .

PHYSICS LETTERS B, 1991, 272 (3-4) :449-454

[8] CHIRAL-SYMMETRY IN NUCLEI - PARTIAL RESTORATION AND ITS CONSEQUENCES [J].

BIRSE, MC .

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 1994, 20 (10) :1537-1575

[9] THERMAL EQUILIBRATION AND EXPANSION IN NUCLEUS-NUCLEUS COLLISIONS AT THE AGS [J].

BRAUNMUNZINGER, P ;

STACHEL, J ;

WESSELS, JP ;

XU, N .

PHYSICS LETTERS B, 1995, 344 (1-4) :43-48

[10] SCALING EFFECTIVE LAGRANGIANS IN A DENSE MEDIUM [J].

BROWN, GE ;

RHO, M .

PHYSICAL REVIEW LETTERS, 1991, 66 (21) :2720-2723

← 1 2 3 4 5 →