The Roberge-Weiss endpoint in N_f = 2 QCD

Abstract

We present the results of extensive simulations regarding the critical behavior at the endpoint of the Roberge-Weiss transition for N_f = 2 QCD. We confirm early evidence, presented in arXiv:0909.0254, according to which the Roberge-Weiss endpoint is first order in the limit of large or small quark masses, and second order for intermediate masses. A systematic study of the transition strength as a function of the quark mass in the first order regions, permits us to estimate the tricritical values of the quark mass separating the second order region from the first order ones.

10 pages, 20 figures. References and figures updated. Matches the published version

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Cited by in corpus (6)

• The chiral phase transition in two-flavor QCD from imaginary chemical potential
• The Critical End Point of Quantum Chromodynamics Detected by Chirally Imbalanced Quark Matter
• Curvature of the chiral pseudo-critical line in QCD
• Nature of Roberge-Weiss transition end points for heavy quarks in $N_f=2$ lattice QCD with Wilson fermions
• Two-color QCD at imaginary chemical potential and its impact on real chemical potential
• Two-flavor QCD at finite quark or isospin density