Speaker
Description
Understanding the modification of heavy mesons when embedded in a high-temperature medium of light mesons is essential in order to properly extract information from the hot matter created in heavy-ion collisions in LHC and RHIC. With this aim, we employ an effective field theory based on chiral and heavy-quark spin-flavor symmetries to describe the scattering of the open heavy-flavor mesons with the pseudoscalar light mesons, and incorporate the non-zero temperature effects within the imaginary-time formalism [1,2]. In this approach the in-medium unitarized scattering amplitudes and the ground-state self-energies are calculated self-consistently. For the $D^{(*)}$ and $D_s^{(*)}$ mesons we find that the resulting masses decrease with increasing temperatures together with a substantial broadening of their widths. This has a direct impact to the thermal modification of the excited mesonic states generated dynamically in our heavy-light molecular model, particularly the $D_0^*(2300)$, $D_1^*(2430)$, $D_{s0}^*(2317)$ and $D_{s1}^*(2460)$ resonances. Moreover, these results can be tested against lattice QCD simulations through the calculation of open-charm Euclidean correlators from the thermal ground-state spectral functions.We find that in the open-charm sector our results compare reasonably well with those of lattice QCD well below $T_c$ [3].
[1] G. Montaña, A. Ramos, L. Tolos and J. M. Torres-Rincon, Phys. Lett. B 806 (2020), 135464 doi:10.1016/j.physletb.2020.
[2] G. Montaña, A. Ramos, L. Tolos and J. M. Torres-Rincon, Phys.Rev.D 102 (2020) 9, 096020 doi:10.1103/PhysRevD.102.096020
[3] G. Montaña, O. Kaczmarek, L. Tolos and A. Ramos, Eur.Phys.J.A 56 (2020) 11, 294 doi:10.1140/epja/s10050-020-00300-y
