Phase diagram of the G(2) Higgs model and G(2)-QCD

Details Phase diagram of the G(2) Higgs model and G(2)-QCD Phase diagram of the G(2) Higgs model and G(2)-QCD

2011-11-02

arxiv.org/abs/1111.0496v1

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 6 figures, presented at The XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16, 2011, Sq

Scientific paper

We investigate gauge theories based on the smallest exceptional simple lie group G(2). Our first model considered here is G(2) Yang-Mills coupled to a fundamental Higgs field. In 4 spacetime dimensions we explore the phase diagram of the theory, showing that at larger Higgs masses the first order deconfinement phase transition turns into a crossover and therefore connects the low temperature confined phase with the high temperature deconfined phase. The second model investigated is G(2) Yang-Mills coupled to fundamental fermions. It shares many features with QCD, especially fermionic baryons, but due to the absence of the fermion sign problem we can investigate this theory with Monte Carlo techniques even at low temperature and high baryonic density. First results on small lattices are presented.

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