Properties of heavy mesons at finite temperature

2019/10/03 by Montaña, Gloria, Ramos, Angels, Tolos, Laura
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1910.01384

Abstract

We study the properties of heavy mesons using a unitarized approach in a hot pionic medium, based on an effective hadronic theory. The interaction between the heavy mesons and pseudoscalar Goldstone bosons is described by a chiral Lagrangian at next-to-leading order in the chiral expansion and leading order in the heavy-quark mass expansion so as to satisfy heavy-quark spin symmetry. The meson-meson scattering problem in coupled channels with finite-temperature corrections is solved in a self-consistent manner. Our results show that the masses of the ground-state charmed mesons D(0^-) and D_s(1^-) decrease in a pionic environment at T≠ 0 and they acquire a substantial width. As a consequence, the behaviour of excited mesonic states (i.e. D_s0^*(2317)^± and D₀^*(2300)^0,±), generated dynamically in our heavy-light molecular model, is also modified at T≠ 0. The aim is to test our results against Lattice QCD calculations in the future.

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