1. RIKEN/BNL Lunch Time Talk

    "Spatial meson correlations and screening masses at finite temperature in lattice simulations with HISQ"

    Presented by Yu Maezawa, BNL

    Thursday, September 26, 2013, 12:30 pm
    Physics, Building 510, Room 2-160

    Hosted by: Koji Kashiwa

    We study spatial meson correlators and screening properties at finite temperature in 2+1 flavor QCD using the Highly Improved Staggered Quarks (HISQ) action. The Screening masses are obtained from spatial meson propagators and enable us to probe the sensitivity of hadronic correlation functions to the quark structure in thermal matter. We focus on the thermal strange and charmed flavor sectors and calculate the meson screening masses on lattices with a temperature range of 140"740 MeV. We find that significant modifications of thermal masses in the strangeness appear even below the critical temperature (Tc), whereas for charmonium states modifications become significant only for T > 1.2Tc. We also present several other properties of meson states at finite temperature, e.g. modifications of amplitudes and the onset of spin and parity degeneracy at high temperature.