Comment on "Ambiguities in the Up-Quark Mass"

Details Comment on "Ambiguities in the Up-Quark Mass" Comment on "Ambiguities in the Up-Quark Mass"

2005-03-04

arxiv.org/abs/hep-ph/0503051v1

Phys.Rev.Lett.95:059101,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

1 page

Scientific paper

10.1103/PhysRevLett.95.059101

Creutz [hep-ph/0312225] has argued that nonperturbative effects in QCD lead
to an additive ambiguity in the up quark mass, and that "this calls into
question the acceptability of attempts to solve the strong CP problem via a
vanishing mass for the lightest quark.'' We show that if the determinant of the
light quark mass matrix vanishes at any scale, then it is real at all scales.

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