Dilepton radiation from nonequilibrized parton matter produced in ultrarelativistic heavy ion collisions

Kampfer, Burkhard; Pavlenko, O.P.

doi:10.1016/0370-2693(92)91373-H

Dilepton radiation from nonequilibrized parton matter produced in ultrarelativistic heavy ion collisions

Burkhard Kampfer
(
)
,
O.P. Pavlenko
(
)

1992

5 pages

Published in:

Phys.Lett.B 289 (1992) 127-131

Published: 1992

DOI:

10.1016/0370-2693(92)91373-H

View in:

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Abstract: (Elsevier)

Dilepton radiation from parton (quark-gluon) matter, produced in ultrarelativistic nucleus-nucleus collisions, is calculated within a kinetic theory approach in order to study non-equilibrium effects. We investigate (i) the approach towards equilibrium in early collisions stages and (ii) the departure from a supposed equilibrium stage due to the subsequent longitudinal expansion. Independent of the details of the parton equilibration process the continuum dilepton rates from quark fusion in deconfined matter are found to exceed the Drell-Yan background in the J ψ region at RHIC and LHC energies. The appearance of higher mass dileptons depends on the degree of thermalization.

nucleus nucleus: nuclear reaction
scattering: heavy ion
heavy ion: scattering
yield: dilepton
matter: parton
thermodynamics
Drell-Yan process
numerical calculations

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