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

Abstract

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.

4 pages, 4 figures

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Cited by in corpus (6)

• Melting Spectral Functions of the Scalar and Vector Mesons in a Holographic QCD Model
• Photoproduction through Chern-Simons Term Induced Interactions in Holographic QCD
• Holographic QCD Integrated back to Hidden Local Symmetry
• Anomaly-induced Chiral Mixing in Cold and Dense Matter
• Constituent quark axial current couplings to light vector mesons in the vacuum and with a weak magnetic field
• Selected Issues in Thermal Field Theory