Lattice NRQCD study of in-medium bottomonium states using $N_f=2+1,48^3\times 12$ HotQCD configurations

Abstract

The behavior of bottomonium state correlators at non-zero temperature, $140.4(\beta =6.664)\le T\le 221(\beta =7.280)$ (MeV), where the transition temperature is $154(9)$ (MeV), is studied, using lattice NRQCD on $48^3\times 12$ HotQCD HiSQ action configurations with light dynamical $N_f=2+1$ ($m_{u,s}/m_s=0.05$) staggered quarks. In order to understand finite temperature effects on quarkonium states, zero temperature behavior of bottomonium correlators is compared based on $32^4$ ($\beta =6.664,6.800$ and $6.950$) and $48^3\times 64$ ($\beta =7.280)$ lattices. We find that temperature effects on S-wave bottomonium states are small but P-wave bottomonium states show a noticeable temperature dependence above the transition temperature.

Comments: 7 pages, 12 figures, contribution to The 31th International Symposium on Lattice Field Theory - Lattice 2013, July 29-August 3, 2013