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Roberge-Weiss endpoint in Nf=2 QCD

Claudio Bonati1, Guido Cossu2, Massimo D’Elia3, and Francesco Sanfilippo4

  • 1Dipartimento di Fisica, Università di Pisa and INFN, Sezione di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
  • 2Theory Center, IPNS, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
  • 3Dipartimento di Fisica, Università di Genova and INFN, Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy
  • 4Dipartimento di Fisica, Università di Roma “La Sapienza” and INFN, Sezione di Roma, Piazzale A. Moro 5, 00185 Roma, Italy

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Phys. Rev. D 83, 054505 – Published 22 March, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.054505

Abstract

We present the results of extensive simulations regarding the critical behavior at the endpoint of the Roberge-Weiss transition for Nf=2 QCD. We confirm early evidence, presented in Ref. [M. D’Elia and F. Sanfilippo, Phys. Rev. D 80, 111501(R) (2009).], 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.

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See Also

Order of the Roberge-Weiss endpoint (finite size transition) in QCD

Massimo D’Elia and Francesco Sanfilippo
Phys. Rev. D 80, 111501(R) (2009)

Article Text

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Phys. Rev. D 83, 054505– Published 22 March, 2011
  • Received 27 January 2011

© 2011 American Physical Society

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