1212.0982 (Florian Burger et al.)

Pseudo-Critical Temperature and Thermal Equation of State from $N_f=2$
Twisted Mass Lattice QCD    [PDF]

Florian Burger, Malik Kirchner, Michael Müller-Preussker, Ernst-Michael Ilgenfritz, Maria-Paola Lombardo, Owe Philipsen, Christopher Pinke, Lars Zeidlewicz

We report about the current status of our ongoing study of the chiral limit of two-flavor QCD at finite temperature with twisted mass quarks. We estimate the pseudo-critical temperature $T_c$ for three values of the pion mass in the range of $m_\mathrm{PS} \simeq 300$ and $500 \mathrm{MeV}$ and discuss different chiral scenarios. Furthermore, we present first preliminary results for the trace anomaly, pressure and energy density. We have studied several discretizations of Euclidean time up to $N_\tau=12$ in order to assess the continuum limit of the trace anomaly. From its interpolation we evaluate the pressure and energy density employing the integral method. Here, we have focussed on two pion masses with $m_\mathrm{PS} \simeq 400$ and $700 \mathrm{MeV}$.

View original: http://arxiv.org/abs/1212.0982