Bc Meson at Finite Temperature

In the present work, we investigate properties of Bc meson in the basis of thermal QCD sum rules. The annihilation and scattering parts of spectral density are calculated in the lowest order of perturbation theory. Taking into account the additional operators arising at finite temperature and perturbative two-loop order αs correction to the spectral density, thermal QCD sum rule is obtained. In particular, the temperature dependence of the mass and leptonic decay constant of Bc mesons are discussed. The obtained results show that at critical or deconfinement temperature, the decay constant decreases approximately 54%. The results at zero temperature are in a good consistency with the existing experimental values as well as predictions of the other nonperturbative approaches.