Lattice NRQCD study of quarkonium at non-zero temperature

Abstract

To study the in-medium modification of quarkonium properties, charmonium correlators at $140.4(\beta =6.664)\le T\le 221(\beta =7.280)$ (MeV) are calculated using the NRQCD formalism on $48^3\times 12$ gauge configurations with dynamical $N_f=2+1$ flavors of Highly Improved Staggered Quarks (HISQ). To determine the "zero energy shift" for these lattices, we perform a fine zero temperature scan ($\beta =6.664,6.740,6.800,6.880,6.950,7.030,7.150$ and $7.280$). We find that the temperature dependence of charmonium correlators is stronger than the temperature dependence of bottomonium correlators in a given channel. This fits into the expected pattern of sequential quarkonium melting.

Comments: 7 pages, 10 figures, Proceedings for the 33rd International Symposium on Lattice Field Theory (Lattice 2015), 14-18 July 2015, Kobe, Japan