Pseudoscalar and vector open-charm mesons at finite temperature
Glòria Montaña, À. Ramos, Laura Tolós, Juan M. Torres-Rincón
Abstract
Vacuum and thermal properties of pseudoscalar and vector charm mesons are analyzed within a self-consistent many-body approach, employing a chiral effective field theory that incorporates heavy-quark spin symmetry. Upon unitarization of the vacuum interaction amplitudes for the scattering of charm mesons off light mesons in a fully coupled-channel basis, new dynamically generated states are searched. The imaginary-time formalism is employed to extend the calculation to finite temperatures up to $T=150\text{ }\text{ }\mathrm{MeV}$. Medium-modified spectral shapes of the $D$, ${D}^{*}$, ${D}_{s}$, and ${D}_{s}^{*}$ mesons are provided. The temperature dependence of the masses and decay widths of the nonstrange ${D}_{0}^{*}(2300)$ and ${D}_{1}^{*}(2430)$ mesons, both showing a double-pole structure in the complex-energy plane, is also reported, as well as that of the ${D}_{s0}^{*}(2317)$ and ${D}_{s1}^{*}(2460)$ resonances and other states not yet identified experimentally. Being the first calculation incorporating open-charm vector mesons at finite temperature in a self-consistent fashion, it brings up the opportunity to discuss the medium effects on the open-charm sector under the perspective of chiral and heavy-quark spin symmetries.