Composite reweighting SU(2) QCD at Finite Temperature

Abstract

The Glasgow reweighting method is evaluated for SU(2) lattice gauge theory at nonzero μand finite T. We establish that the ' overlap problem' of SU(3) measurements, in which the transition points determined from thermodynamic observables have an unphysical dependence on the value of μused in the reweighting persists for SU(2). By combining the information from different lattice ensembles we alleviate sampling bias in the fugacity expansion, and identify the Lee-Yang zeros associated with the transition to a high density phase that can plausibly be associated with diquark condensation. We also confirm the existence of a line of first order transitions above a critical point in the T-μplane previously identified by effective chiral lagrangian calculations.

8 pages, 7 figures

References in corpus (2)

• Two-colour QCD at non-zero quark-number density
• Diquark Condensation at Nonzero Chemical Potential and Temperature

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• Thermodynamics of chiral symmetry at low densities
• The factorization method for systems with a complex action -a test in Random Matrix Theory for finite density QCD-
• Remarks on the multi-parameter reweighting method for the study of lattice QCD at non-zero temperature and density
• The pseudo-Goldstone spectrum of 2-colour QCD at finite density
• Melting the Diquark Condensate in Two-Color QCD: A Renormalization Group Analysis
• Spontaneous Parity Violation
• The Partition Function Zeroes of Quantum Critical Points
• Composite reweighting with Imaginary Chemical Potentials in SU(3)