Seminar über aktuelle Frage der theoretischen Kernphysik

8.04.14 16:15

Bottomonium spectroscopy at finite temperature: probing the quark gluon plasma

Sinead Ryan, Trinity College Ireland

The temperature dependence of bottomonium states above and
below T_c is investigated, using non-relativistic dynamics for the bottom quark
and full relativistic lattice QCD simulations for two light flavours on a highly
anisotropic lattice. Heavy quark states can be an important probe of the
dynamics of the quark gluon plasma (QGP) and NRQCD offers particular
advantages in such studies. We find that the S-waves ($\Upsilon$ and $\eta_b$)
show little temperature dependence in this range while the P waves show a
crossover from the exponential decay characterizing the hadronic phase to a
power-law behaviour consistent with nearly-free dynamics at approximately
twice the critical temperature.

Kategorie: Kernphysik, News