Equation of state in 2+1 flavor QCD with improved Wilson quarks by the fixed scale approach

Understand

We study the equation of state in 2+1 flavor QCD with nonperturbatively improved Wilson quarks coupled with the RG-improved Iwasaki glue.

• We apply the $T$-integration method to nonperturbatively calculate the equation of state by the fixed-scale approach.
• With the fixed-scale approach, we can purely vary the temperature on a line of constant physics without changing the system size and renormalization constants.
• Unlike the conventional fixed-$N_t$ approach, it is easy to keep scaling violations small at low temperature in the fixed scale approach.