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Roberge-Weiss phase transition and its endpoint
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The Roberge-Weiss (RW) phase transition in the imaginary chemical potential region is analyzed by the Polyakov-loop extended Nambu--Jona-Lasinio (PNJL) model. In the RW phase transition, the charge-conjugation symmetry is spontaneously broken, while the extended Z3 symmetry (the RW periodicity) is preserved. The RW transition is of second order at the endpoint. At the zero chemical potential, a crossover deconfinement transition appears as a remnant of the second-order RW phase transition at the endpoint, while the charge-conjugation symmetry is always preserved.
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Cited by 1 Pith paper
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Lee Yang edge singularities of QCD in association with Roberge-Weiss phase transition and chiral phase transition
Including a confining background field in Dyson-Schwinger equations makes Lee-Yang edge singularities terminate at the Roberge-Weiss line, mu_i = pi T / 3, above T = 0.235 GeV, while leaving the critical exponent unchanged.
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