A novel spectral broadening from vector--axial-vector mixing in dense matter

Details A novel spectral broadening from vector--axial-vector mixing in dense matter A novel spectral broadening from vector--axial-vector mixing in dense matter

2009-02-20

arxiv.org/abs/0902.3608v1

Phys.Rev.C80:054912,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures

Scientific paper

10.1103/PhysRevC.80.054912

The presence of baryonic matter leads to the mixing between transverse $\rho$ and $a_1$ mesons through a set of $\omega\rho a_1$-type interactions, which results in the modification to the dispersion relation. We show that a clear enhancement of the vector spectral function appears below $\sqrt{s}=m_\rho$ for small three-momenta of the $\rho$ meson, and thus the vector spectrum exhibits broadening. We also discuss its relevance to dilepton measurements.

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