Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-03-07
Nucl.Phys.B789:111-132,2008
Physics
High Energy Physics
High Energy Physics - Lattice
31 pages, 20 figures, enhanced discussion and analysis of finite volume effects, version accepted for publication by Nucl. Phy
Scientific paper
10.1016/j.nuclphysb.2007.07.025
We study a quenched SU(2) lattice gauge theory in which, in an attempt to distinguish between timelike and spacelike gauge fields, the gauge ensemble {U_mu} is generated from a 3 dimensional gauge-Higgs model, the timelike link variables being "reconstructed" from the Higgs fields. The resulting ensemble is used to study quenched quark propagation with non-zero chemical potential mu; in particular, the quark density, chiral and superfluid condensates, meson, baryon and gauge-fixed quark propagators are all studied as functions of mu. While it proves possible to alter the strength of the inter-quark interaction by changing the parameters of the dimensionally reduced model, there is no evidence for any region of parameter space where quarks exhibit deconfined behaviour or thermodynamic observables scale as if there were a Fermi surface.
Giudice Pietro
Hands Simon
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