Speaker
Description
We compute for the first time the suppression of bottomonia in a strongly coupled QGP and compare the results to those from a weakly coupled QGP and to data. Using imaginary time techniques we numerically determine the real and imaginary parts of the ground state binding energy of the $\Upsilon$(1S) in a $p_T$-independent potential computed from AdS/CFT and another computed from pQCD. We implement the complex binding energies in a suppression model to determine the $\Upsilon$(1S) nuclear modification factor in $\sqrt{s}_{NN}=2.76$ TeV Pb+Pb collisions. This simplest strong-coupling, $p_T$-independent potential leads to a significant oversuppression of $\Upsilon$(1S) compared to data while the results from the pQCD-derived potential are consistent with data. We will then investigate the validity of using complex heavy quark potentials from AdS/CFT for all quark separation $r$ by comparing our imaginary time binding energies to those binding energies derived independently from AdS/CFT. Time permitting, we will compare independent calculations of the bottomonia spectral functions from AdS/CFT and then present results based on a more sophisticated $p_T$-dependent quarkonia potential also derived from AdS/CFT.