Dileptons from Disoriented Chiral Condensates

Details Dileptons from Disoriented Chiral Condensates Dileptons from Disoriented Chiral Condensates

1997-04-10

arxiv.org/abs/nucl-th/9704018v1

Phys.Rev.C57:280-290,1998

Physics

Nuclear Physics

Nuclear Theory

22 pages, 8 figures, uses epsf-style

Scientific paper

10.1103/PhysRevC.57.280

Disoriented chiral condensates or long wavelength pionic oscillations and their interaction with the thermal environment can be a significant source of dileptons. We calculate the yield of such dilepton production within the linear sigma model, both in a quantal mean-field treatment and in a semi-classical approximation. We then illustrate the basic features of the dilepton spectrum in a schematic model. We find that dilepton yield with invariant mass near and below $2m_{\pi}$ due to the soft pion modes can be up to two orders of magnitude larger than the corresponding equilibrium yield.

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