Critical endline of the finite temperature phase transition for 2+1 flavor QCD around the SU(3)-flavor symmetric point

Abstract

We investigate the critical endline of the finite temperature phase transition of QCD around the SU(3)-flavor symmetric point at zero chemical potential. We employ the renormalization-group improved Iwasaki gauge action and non-perturbatively $O(a)$-improved Wilson-clover fermion action. The critical endline is determined by using the intersection point of kurtosis, employing the multi-parameter, multi-ensemble reweighting method to calculate observables off the SU(3)-symmetric point, at the temporal size $N_{\mathrm{T}}$=6 and lattice spacing as low as $a\approx 0.19$ fm. We confirm that the slope of the critical endline takes the value of $-2$, and find that the second derivative is positive, at the SU(3)-flavor symmetric point on the Columbia plot parametrized with the strange quark mass $m_s$ and degenerated up-down quark mass $m_{\mathrm{l}}$.

9 pages, 5 figures

References in corpus (3)

• Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields
• Critical endpoint of finite temperature phase transition for three flavor QCD
• Curvature of the critical line on the plane of quark chemical potential and pseudo scalar meson mass for three-flavor QCD

Cited by in corpus (5)

• Nature of the phase transition for finite temperature $N_{\mathrm{f}}=3$ QCD with nonperturbatively O($a$) improved Wilson fermions at $N_{\mathrm{t}}=12$
• The phase structure of QCD
• Critical point phase transition for finite temperature 3-flavor QCD with non-perturbatively O($a$) improved Wilson fermions at $N_{\mathrm{t}}=10$
• Continuum extrapolation of the critical endpoint in 4-flavor QCD with Wilson-Clover fermions
• Critical endpoint in the continuum limit and critical endline at $N_{\mathrm{T}}=6$ of the finite temperature phase transition of QCD with clover fermions