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T: Fachverband Teilchenphysik
T 23: Gittereichtheorie I
T 23.3: Talk
Monday, March 28, 2011, 17:15–17:30, 30.23: 10-1
Confinement from exceptional gauge groups — •Björn H. Wellegehausen and Andreas Wipf — Theor. phys. Inst., FSU Jena
In SU(3) gluodynamics confinement is related to the Z3 center symmetry but it has been convincingly demonstrated that also Yang-Mills theories with gauge groups with a trivial center show confinement. To investigate such theories on the lattice we present an efficient local hybrid Monte-Carlo algorithm for exceptional gauge groups, especially G2 gauge theory coupled to a Higgs field. In four dimensions we explored the phase diagram showing that a line of first order confinement-deconfinement phase transitions connects G2 and SU(3) gluodynamics and a line of second order phase transitions separates the two deconfinement phases. We also present first lattice results on the confinement-deconfinement phase transition in F4 and E6 gauge theorie.