Resumo:
Charm and bottom transport coefficients in a medium constituted of light mesons, such as is formed in the
hadronic phase of heavy-ion collisions, are obtained within an effective field theory approach implementing
heavy-quark symmetry and chiral symmetry breaking. Heavy flavor propagates in the medium as D/B and
D*/B* degrees of freedom, and unitarization of the lowest order heavy–light meson amplitudes is used in
order to reach high temperatures. The latter accounts for dynamically generated resonances in isospin 1/2
channels, a feature that leads to a more efficient heavy-flavor diffusion. We discuss the temperature and
momentum dependence of the friction and diffusion coefficients in a transport approach up to temperatures
of about T 150 MeV, and provide estimates of the charm/bottom relaxation lengths and momentum loss.
Implications for heavy-meson spectrum observables in heavy-ion collisions are discussed.
