Broken symmetries and dilepton production from gluon fusion in a quark gluon plasma

Details Broken symmetries and dilepton production from gluon fusion in a quark gluon plasma Broken symmetries and dilepton production from gluon fusion in a quark gluon plasma

2003-11-13

arxiv.org/abs/hep-ph/0311178v2

Phys.Rev.C69:064901,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 13 figures, Revtex4, minor changes, version accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.69.064901

The observational consequences of certain broken symmetries in a thermalised quark gluon plasma are elucidated. The signature under study is the spectrum of dileptons radiating from the plasma, through gluon fusion. Being a pure medium effect, this channel is non-vanishing only in plasmas with explicitly broken charge conjugation invariance. The emission rates are also sensitive to rotational invariance through the constraints imposed by Yang's theorem. This theorem is interpreted in the medium via the destructive interference between various multiple scattering diagrams obtained in the spectator picture. Rates from the fusion process are presented in comparison with those from the Born term.

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