Pseudoscalar and vector open-charm mesons at finite temperature
Glòria Montaña (Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain); Àngels Ramos (Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain); Laura Tolos (Institut für Theoretische Physik, Goethe Universität Frankfurt, Max von Laue Strasse 1, 60438 Frankfurt, Germany, Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany, Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, 08193 Barcelona, Spain, Institut d’Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain); Juan M. Torres-Rincon (Institut für Theoretische Physik, Goethe Universität Frankfurt, Max von Laue Strasse 1, 60438 Frankfurt, Germany)
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 . Medium-modified spectral shapes of the , , , and mesons are provided. The temperature dependence of the masses and decay widths of the nonstrange and mesons, both showing a double-pole structure in the complex-energy plane, is also reported, as well as that of the and 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.