TY  - INPR
A1  - Mishustin, Igor N.
A1  - Satarov, Leonid M.
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Dilepton production by bremsstrahlung of meson fields in nuclear collisions
N2  - We study the bremsstrahlung of virtual omega mesons due to the collective deceleration of nuclei at the initial stage of an ultrarelativistic heavy ion collision. It is shown that electromagnetic decays of these mesons may give an important contribution to the observed yields of dileptons. Mass spectra of e+e and µ+µ pairs produced in central Au+Au collisions are calculated under some simplifying assumptions on the space time variation of the baryonic current in a nuclear collision process. Comparison with the CERES data for 160 AGev Pb+Au collisions shows that the proposed mechanism gives a noticeable fraction of the observed e+e pairs in the intermediate region of invariant masses. Sensi tivity of the dilepton yield to the in medium modification of masses and widths of vector mesons is demonstrated.
KW  - Bremsstrahlung
KW  - Kollisionen schwerer Ionen
KW  - Meson
KW  - bremsstrahlung
KW  - heavy ion collision
KW  - meson
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3065
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-23323
ER  -