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Behaviour of the topological susceptibility in two colour QCD across the finite density transition

2006/02/28 by B. Allés, B. Alles, Massimo D’Elia +3 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph #hep-th

paper · pdf · doi:10.1016/j.nuclphysb.2006.06.023

published as Nucl.Phys.B752:124-139,2006 · Latex file, 28 pages, 6 Figures, revised version with further study of Pauli blocking, phase diagram, physical units and the HMD algorithm. A few misprints corrected. Some references added

arxiv created 2006/06/23 · openalex publication_date 2006/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The behaviour of the topological susceptibility χin QCD with two colours and 8 flavours of quarks is studied at nonzero temperature on the lattice across the finite density transition. It is shown that the signal of χdrops abruptly at a critical chemical potential μc, much as it happens at the finite temperature and zero density transition. The Polyakov loop and the chiral condensate undergo their transitions at the same critical value μc. At a value μs of the chemical potential, called saturation point, which in our case satisfies μs > μc, Pauli blocking supervenes and consequently the theory becomes quenched.

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