Bottom-strange mesons in hyperonic matter

Abstract

The in-medium behavior of bottom-strange pseudoscalar mesons in hot, isospin asymmetric and dense hadronic environment is studied using a chiral effective model. The same was recently generalized to the heavy quark sector and employed to study the behavior of open-charm and open-bottom mesons. The heavy quark (anti-quark) is treated as frozen and all medium modifications of these bottom-strange mesons are due to their strange anti-quark (quark) content. We observe a pronounced dependence of their medium mass on baryonic density and strangeness content of the medium. Certain aspects of these in-medium interactions are similar to those observed for the strange-charmed mesons in a preceding investigation, such as the lifting of mass-degeneracy of $B_S^0$ and ${\bar{B}}_S^0$ mesons in hyperonic matter, while the same is respected in vacuum as well as in nuclear matter. In general, however, there is a remarkable distinction between the two species, even though the formalism predicts a completely analogous in-medium interaction Lagrangian density. We discuss in detail the reason for different in-medium behavior of these bottom-strange mesons as compared to charmed-strange mesons, despite the dynamics of the heavy quark being treated as frozen in both cases.

16 pages, 2 figures

References in corpus (8)

• QCD sum rules for D and B mesons in nuclear matter
• Decay constants of heavy pseudoscalar mesons from QCD sum rules
• D-mesons in asymmetric nuclear matter
• Kaon and antikaon optical potentials in isospin asymmetric hyperonic matter
• Isospin dependent kaon and antikaon optical potentials in dense hadronic matter
• Kaons and antikaons in asymmetric nuclear matter
• Open bottom states and the anti-B meson propagation in hadronic matter
• Bottomonium states in hot asymmetric strange hadronic matter