The effects of meson mixing on dilepton spectra

Abstract

The effect of scalar and vector meson mixing on the dilepton radiation from hot and dense hadronic matter is estimated in different isospin channels. In particular, we study the effect of $\sigma$-$\omega$ and $\rho -a_0$ mixing and calculate the corresponding rates. Effects are found to be significant compared to standard $\pi$-$\pi$ and $K$-$\bar{K}$ annihilations. While the mixing in the isoscalar channel mostly gives a contribution in the invariant mass range between the two-pion threshold and the $\omega$ peak, the isovector channel mixing induces an additional peak just below that of the $\varphi$. Experimentally, the dilepton signals from $\rho$-$a_0$ mixing seem to be more tractable than those from $\sigma$-$\omega$ mixing.

10 pages, 9 figures

References in corpus (1)

• Matter induced $\rho$-$\delta$ mixing : a source of dileptons

Cited by in corpus (8)

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• Omega meson propagation in dense nuclear matter and collective excitations
• Dispersion relation of the $\rho$ meson in hot/dense nuclear matter
• Aspects of meson properties in dense nuclear matter
• Two-photon decays of vector mesons and dilepton decays of scalar mesons in dense matter
• rho -> pi pi decay in nuclear medium
• Dielectron Production in Heavy Ion Collisions at 158 GeV/c per Nucleon
• $\rho$ - meson spectral function in hot nuclear matter