Speaker
Description
I will outline a systematic description of medium induced modifications to quarkonium in a quark gluon plasma by making use of the Open Quantum Systems framework and effective field theories such as pNRQCD. These medium effects are encoded in a finite set of transport coefficients defined through real-time thermal chromoelectric correlators, which can be associated with analytically continued counterparts in Euclidean space.
I will present NLO spectral functions for these correlators, emphasizing the asymmetric contributions arising from Matsubara zero modes, and report the corresponding NLO values of the transport coefficients. Importantly, I present a new, general method of extracting the transport coefficient governing the in-medium mass shift, γ directly from its Euclidean correlator without spectral reconstruction even for correlators lacking symmetry. This method provides a novel prospect for extracting quarkonium mass shifts, directly from Euclidean lattice data in a clear and robust manner. Time permitting, I also outline our strategy for extending the computation to order O(g^6).