DIELECTRON PRODUCTION IN PP AND PA COLLISIONS AT 4.9 GEV

被引：19

作者：

WINCKELMANN, LA ^{[1
]}

STOCKER, H ^{[1
]}

GREINER, W ^{[1
]}

SORGE, H ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

来源：

PHYSICS LETTERS B | 1993年 / 298卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(93)91699-N

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A covariant phase space approach (RQMD) is used to predict dielectron mass spectra for interactions of proton on proton and proton on deuteron at 4.9 GeV incident energy. Dalitz decays of eta's dominate the dilepton mass spectra above the pi0 mass up to 0. 5 GeV while decays of vector mesons produce a peak around the rho0 mass. pn bremsstrahlung is strongly reduced at these masses. This is due to the forward peak in the differential elastic cross section dsigma/dt at energies above E(kin) almost-equal-to 1 GeV, as compared to previous calculations. The results for p + Be at 4.9 GeV compare well with available DLS-data.

引用

页码：22 / 26

页数：5

共 26 条

[1]

BARGER V, 1969, PHENOMENOLOGICAL THE

[2] DILEPTON RADIATION FROM NUCLEON-NUCLEON COLLISIONS [J].

GALE, C ;

KAPUSTA, J .

PHYSICAL REVIEW C, 1989, 40 (05) :2397-2399

[3] DILEPTON RADIATION FROM HIGH-TEMPERATURE NUCLEAR-MATTER [J].

GALE, C ;

KAPUSTA, J .

PHYSICAL REVIEW C, 1987, 35 (06) :2107-2116

[4] DIFFRACTIVE INTERACTIONS OF HADRONS AT HIGH-ENERGIES [J].

GOULIANOS, K .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1983, 101 (03) :170-219

[5] COVARIANT COMPUTATION OF E+E- PRODUCTION IN NUCLEON NUCLEON COLLISIONS [J].

HAGLIN, K ;

KAPUSTA, J ;

GALE, C .

PHYSICS LETTERS B, 1989, 224 (04) :433-436

[6] ONE-BOSON-EXCHANGE APPROACH TO DILEPTON PRODUCTION IN NUCLEON NUCLEON COLLISIONS [J].

HAGLIN, KL .

ANNALS OF PHYSICS, 1991, 212 (01) :84-155

[7] STRONG ANTIPROTON SUPPRESSION IN RELATIVISTIC NUCLEAR COLLISIONS [J].

JAHNS, A ;

SORGE, H ;

STOCKER, H ;

GREINER, W .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1992, 341 (02) :243-244

[8] ANTIPROTON PRODUCTION AND ANNIHILATION IN NUCLEAR COLLISIONS AT 15A GEV [J].

JAHNS, A ;

STOCKER, H ;

GREINER, W ;

SORGE, H .

PHYSICAL REVIEW LETTERS, 1992, 68 (19) :2895-2897

[9] CONTRIBUTION OF 2-PION ANNIHILATION TO DILEPTON EMISSION FROM PROTON-NUCLEON COLLISIONS [J].

KAPUSTA, J ;

LICHARD, P .

PHYSICAL REVIEW C, 1989, 40 (04) :R1574-R1576

[10] MASS AND TRANSVERSE-MOMENTUM DEPENDENCE OF THE DIELECTRON YIELD IN P-BE COLLISIONS AT 4.9 GEV [J].

LETESSIERSELVON, A ;

BYSTRICKY, J ;

CARROLL, J ;

GORDON, J ;

HALLMAN, T ;

IGO, G ;

KIRK, P ;

KREBS, GF ;

LALLIER, E ;

LANDAUD, G ;

MADANSKY, L ;

MATIS, HS ;

MILLER, D ;

NAUDET, C ;

ROCHE, G ;

SCHROEDER, LS ;

SEIDL, PA ;

WANG, ZF ;

WELSH, R ;

YEGNESWARAN, A .

PHYSICAL REVIEW C, 1989, 40 (03) :1513-1516

← 1 2 3 →