Missing (up) Mass, Accidental Anomalous Symmetries, and the Strong CP Problem

Details Missing (up) Mass, Accidental Anomalous Symmetries, and the Strong CP Problem Missing (up) Mass, Accidental Anomalous Symmetries, and the Strong CP Problem

1994-03-01

arxiv.org/abs/hep-ph/9403203v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, WIS-94/14/Feb-PH, RU-94-24

Scientific paper

We reconsider the massless up quark solution of the strong CP problem. We show that an anomaly free horizontal symmetry can naturally lead to a massless up quark and to a corresponding accidental anomalous symmetry. Reviewing the controversy about the phenomenological viability of $m_u=0$ we conclude that this possiblity is still open and can solve the strong CP problem. To appear in the Proceedings of The Yukawa Couplings and the Origins of Mass Workshop.

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