Friday, July 26, 2013

1307.6696 (M. Hayakawa et al.)

Lattice Study on quantum-mechanical dynamics of two-color QCD with six
light flavors

M. Hayakawa, K. -I. Ishikawa, S. Takeda, M. Tomii, N. Yamada
The chiral properties of SU(2) gauge theory with six flavors, i.e. six light Dirac fermions in the fundamental representations, are investigated by lattice simulation. The analysis of the mesonic spectrum indicates the absence of chiral symmetry breaking. The decay constant tends to be increased by the finite size effect, which is opposite to the behavior predicted by chiral perturbation theory and indicates that the long distance dynamics in the six-flavor theory could be different from the theory with chiral symmetry breaking. The subtracted chiral condensate, whose utility is demonstrated by the simulation of two-flavor theory, is shown to vanish in the chiral limit within the precision of available data.
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