Yukawa matrices from a spontaneously broken abelian symmetry

Details Yukawa matrices from a spontaneously broken abelian symmetry Yukawa matrices from a spontaneously broken abelian symmetry

1995-04-12

arxiv.org/abs/hep-ph/9504292v1

Phys.Lett.B356:45-55,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, tex, no figures

Scientific paper

10.1016/0370-2693(95)00795-M

We classify all the phenomenologically viable fermion mass matrices coming from a spontaneously broken abelian symmetry $ U(1)_X, $ with one and two additional chiral fields of opposite charges $ X=\pm 1. $ We find that the non-trivial K\"ahler metric can fill zeroes of the fermion mass matrices up to phenomenologically interesting values. A general anomaly analysis shows that for one additional chiral field the only way to achieve anomaly cancellation is by use of the Green-Schwarz mechanism. For two additional fields with $X=\pm 1$ and negative charge differences in the lepton sector the anomalies can however be directly put to zero. This case gives a unique prediction for the ratio of the two Higgs scalars of MSSM, ${\rm tg} \beta \sim { m_t \over m_b} (sin \theta_c)^ 2$, where $\theta_c$ is the Cabibbo angle.

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