4-7 August 2020
online
Asia/Tokyo timezone

Fluctuations of conserved charges in a background magnetic field

4 Aug 2020, 16:20
20m
online

online

QCD at nonzero Temperature and Density QCD at nonzero Temperature and Density

Speaker

Sheng-Tai Li (*) (Chinese Academy of Sciences (CAS) - Institute of Modern Physics (IMP) & Central China Normal University)

Description

We will present results on the second order fluctuations of net baryon number, electric charge and strangeness as well as correlations among these conserved charges in (2+1)-flavor lattice QCD in the presence of a background magnetic field.
Simulations are performed using the tree level improved gauge action and the highly improved staggered quark
(HISQ) action with a fixed scale approach ($a$=0.117 fm). The light quark mass is set to be 1/10 of the physical strange quark mass and the corresponding pion mass is about 220 MeV at vanishing magnetic field. At zero temperature the simulations are performed on $32^3\times96$ lattices while at nonzero temperature on $32^3\times N_\tau$ lattices having six values of $N_\tau$ varying from 16 to 6 corresponding to temperature ranging from 105 MeV to 280 MeV. The magnetic field strength $eB$ is simulated with about 15 different values up to 3.5 GeV$^2$ at each temperature. Chiral condensates and disconnected susceptibilities as a function of $eB$ are also discussed.

Primary author

Sheng-Tai Li (*) (Chinese Academy of Sciences (CAS) - Institute of Modern Physics (IMP) & Central China Normal University)

Co-authors

Presentation Materials