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- W2034259087 abstract "We present results from numerical simulations of the 2+1d SU(2)xSU(2) Nambu - Jona-Lasinio model with N_f=4 fermion flavours at zero and nonzero temperature T. At zero temperature, critical exponents are extracted from the scaling of the order parameter and fermion mass and are found to be consistent with next-to-leading order predictions of the 1/N_f expansion. At nonzero temperature we observe fermion mass generation despite the lack of chiral symmetry breaking, which is forbidden by the Colemann-Mermin-Wagner theorem for all T>0. We study the effects of lattice discretisation and finite volume on the dynamically generated fermion mass. By study of the lattice dispersion relation we also show that in the hot phase there is no significant temperature induced modification to the speed of light. Studies of the equation of state are made by measuring the pressure as a function of temperature and comparison is made with large-N_f predictions." @default.
- W2034259087 created "2016-06-24" @default.
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- W2034259087 date "2003-02-19" @default.
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- W2034259087 title "Mass generation without phase coherence at nonzero temperature" @default.
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- W2034259087 doi "https://doi.org/10.1103/physrevd.67.034505" @default.
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