Effective-theory description of heavy-flavored hadrons and their properties in a hot medium

Glòria Montaña

Published 2022-07-21Version 1

This dissertation investigates exotic hadrons with heavy-quark content that may be understood as being generated dynamically from the hadron-hadron interaction. This interaction is derived from a suitable effective Lagrangian and properly unitarized in a full coupled-channel basis. In particular, we discuss the possible interpretation of some of the {\Omega}c* excited states recently discovered at LHCb as being meson-baryon molecular states. We also discuss the dynamical generation of excited open-charm mesons from the scattering of pseudoscalar and vector charmed mesons off light mesons. We show that a double-pole structure is predicted for the D0*(2300) state, as well as for the D1(2430), while the Ds0*(2317) and the Ds1(2460) may be interpreted as molecular bound states. Extensions of these calculations to the bottom sector are also presented. Furthermore, we investigate the thermal modification of the open heavy-flavor mesons in a hot medium. By means of an extension to finite temperature of the unitarized effective interactions with the light mesons, we obtain the in-medium spectral properties of the D, D*, Ds, and Ds* ground-state mesons. We also analyze the temperature dependence of the masses and the decay widths of the dynamically generated states. Additionally, we provide results for the bottomed mesons by exploiting the heavy-quark spin-flavor symmetry of the Lagrangian. We employ the temperature-dependent spectral functions to compute charm Euclidean correlators. We also present calculations of off-shell transport coefficients in the hadronic phase implementing in-medium scattering amplitudes and the thermal dependence of the heavy-meson spectral properties.