CONTRIBUTION OF PI(0) AND ETA-DALITZ DECAYS TO THE DILEPTON INVARIANT-MASS SPECTRUM IN 1A GEV HEAVY-ION COLLISIONS

Authors
HOLZMANN R APPENHEIMER M AVERBECK R CHARBONNIER Y DELAGRANGE H DIAZ J DOPPENSCHMIDT A HEJNY V HLAVAC S KUGLER A LEFEVRE F LOHNER H MARIN A MARTINEZ G MATULEWICZ T METAG V NOVOTNY R OSTENDORF RW PLESKAC R SCHUTZ Y SIEMSSEN RH SIMON RS STROHER H TLUSTY P VOGT PH WAGNER V WEISS J WILSCHUT HW WISSMANN F WOLF AR WOLF M
Citation
R. Holzmann et al., CONTRIBUTION OF PI(0) AND ETA-DALITZ DECAYS TO THE DILEPTON INVARIANT-MASS SPECTRUM IN 1A GEV HEAVY-ION COLLISIONS, Physical review. C. Nuclear physics, 56(6), 1997, pp. 2920-2923
Citations number
32
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
56
Issue
6
Year of publication
1997
Pages
2920 - 2923
Database
ISI
SICI code
0556-2813(1997)56:6<2920:COPAED>2.0.ZU;2-Y
Abstract
The Dalitz-decay contributions of pi(0) and eta mesons to the di-elect ron invariant-mass spectrum at 1A GeV have been obtained from a system atics of inclusive meson production cross sections measured for the co llision systems C-12 + C-nat and Ar-40, Ca-40 + Ca-nat in the bombardi ng-energy range of 0.8-2.0 A GeV. These results are compared with the recently published di-electron mass spectra of the DLS collaboration. Systematic errors and angular-distribution effects are discussed. We c onclude that the low-mass part of the DLS data cannot be explained by the Dalitz decays of light neutral mesons only.