Spectrum of orientifold QCD in the strong coupling and hopping expansion approximation

Details Spectrum of orientifold QCD in the strong coupling and hopping expansion approximation Spectrum of orientifold QCD in the strong coupling and hopping expansion approximation

2009-11-27

arxiv.org/abs/0911.5111v1

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages

Scientific paper

We use the strong coupling and hopping parameter expansions to calculate the pion and rho meson masses for lattice Yang-Mills gauge theories with fermions in irreducible two-index representations, namely the adjoint, symmetric and antisymmetric. The results are found to be consistent with orientifold planar equivalence, and leading order 1/N corrections are calculated in the lattice phase. An estimate of the critical bare mass, for which the pion is massless, is obtained as a function of the bare coupling. A comparison to data from the two-flavour SU(2) theory with adjoint fermions gives evidence for a bulk phase transition at beta~2, separating a pure lattice phase from a phase smoothly connected to the continuum.

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