Strange meson production at high density and temperature

Abstract

The properties of strange mesons ($K$, $\bar{K}$ and ${\bar{K}}^{\ast }$) in dense matter are studied using a unitary approach in coupled channels for meson-baryon scattering. The kaon-nucleon interaction incorporates $s$- and $p$-wave contributions within a chiral model whereas the interaction of ${\bar{K}}^{\ast }$ with nucleons is obtained in the framework of the local hidden gauge formalism. The in-medium solution for the scattering amplitude accounts for Pauli blocking effects, mean-field binding on baryons, and meson self-energies. We obtain the $K$, $\bar{K}$ and ${\bar{K}}^{\ast }$ (off-shell) spectral functions in the nuclear medium and study their behaviour at finite density, temperature and momentum. We also analyze the energy weighted sum rules of the kaon propagator as a quality test of model calculations. We finally estimate the transparency ratio of the $\gamma A\to K^{+}{K}^{\ast -}{A}^{\prime }$ reaction, which we propose as a feasible scenario at present facilities to detect in-medium modifications of the ${\bar{K}}^{\ast }$ meson.

6 pages, 5 figures, invited seminar in New Frontiers in QCD 2010 -Exotic Hadron Systems and Dense Matter- (NFQCD2010), Kyoto, January 18-March 19, 2010

References in corpus (12)

• Kaon production in heavy ion reactions at intermediate energies
• In-medium nuclear interactions of low-energy hadrons
• The properties of \bar{K} in the nuclear medium
• Hadron properties in the nuclear medium
• Nuclear kaon dynamics
• Dynamically generated resonances from the vector octet-baryon octet interaction
• Hadrons in strongly interacting matter
• K${}^{-}$-proton scattering and the $\Lambda (1405)$ in dense matter
• Partial wave contributions to the antikaon potential at finite momentum
• Antikaons and hyperons in nuclear matter with saturation
• ${\bar{K}}^{\ast }$ meson in dense matter
• Energy weighted sum rules for mesons in hot and dense matter

Cited by in corpus (1)

• Spectral functions of strange vector mesons in asymmetric hyperonic matter