The Chiral Critical Surface of QCD

  • Ph. de Forcrand
  • O. Philipsen
Conference paper


We calculate the critical surface bounding the region featuring chiral phase transitions in the quark mass and chemical potential parameter space of QCD with three flavours of quarks. Our calculations are valid for small to moderate quark chemical potentials, μT. In a first step, we compute the leading Taylor coefficients of an expansion in μ/T for the theory with three degenerate flavours in two different ways and demonstrate, that such an expansion is controllable. Next we extend our calculations to the case of non-degenerate quark masses. These calculations are done on coarse N t =4 lattices. Finally, we present first results for the N f =3 QCD phase diagram at zero and finite density on N t =6 lattices, corresponding to a lattice spacing of a∼0.2 fm.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ph. de Forcrand
    • 1
    • 2
  • O. Philipsen
    • 3
  1. 1.Institut für Theoretische PhysikETH ZürichZürichSwitzerland
  2. 2.Physics DepartmentCERNGeneva 23Switzerland
  3. 3.Institut für Theoretische PhysikWestfälische Wilhelms-Universität MünsterMünsterGermany

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