Critical point of Nf =3 QCD from lattice simulations in the canonical ensemble
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A canonical ensemble algorithm is employed to study the phase diagram of Nf ¼ 3 QCD using lattice simulations. We lock in the desired quark number sector using an exact Fourier transform of the fermion determinant. We scan the phase space below Tc and look for an S-shape structure in the chemical potential, which signals the coexistence phase of a first order phase transition in finite volume. Applying Maxwell construction, we determine the boundaries of the coexistence phase at three temperatures and extrapolate them to locate the critical point. Using an improved gauge action and improved Wilson fermions on lattices with a spatial extent of 1.8 fm and quark masses close to that of the strange, we find the critical point at TE ¼ 0:925ð5ÞTc and baryon chemical potential EB ¼ 2:60ð8ÞTc.
Published Version (Please cite this version)10.1103/PhysRevD.84.071503
Publication InfoLi, A; Alexandru, A; & Liu, KF (2011). Critical point of Nf =3 QCD from lattice simulations in the canonical ensemble. 10.1103/PhysRevD.84.071503. Retrieved from https://hdl.handle.net/10161/5086.
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