Scalar quarkonia at finite temperature
Scalar quarkonia at finite temperature
Masses and decay constants of the scalar quarkonia, ${\ensuremath{\chi}}_{Q0}(Q=b,c)$ with quantum numbers ${I}^{G}({J}^{PC})={0}^{+}({0}^{++})$, are calculated in the framework of the QCD sum rules approach both in vacuum and finite temperature. The masses and decay constants remain unchanged up to $T\ensuremath{\simeq}100\text{ }\text{ }\mathrm{MeV}$ but they start to diminish with increasing the …