Phenomenological viability of orbifold models with three Higgs families

Details Phenomenological viability of orbifold models with three Higgs families Phenomenological viability of orbifold models with three Higgs families

2005-12-22

arxiv.org/abs/hep-ph/0512301v2

JHEP 0607 (2006) 041

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 12 figures. Comments and references added. Final version to be published in JHEP

Scientific paper

10.1088/1126-6708/2006/07/041

We discuss the phenomenological viability of string multi-Higgs doublet models, namely a scenario of heterotic $Z_3$ orbifolds with two Wilson lines, which naturally predicts three supersymmetric families of matter and Higgs fields. We study the orbifold parameter space, and discuss the compatibility of the predicted Yukawa couplings with current experimental data. We address the implications of tree-level flavour changing neutral processes in constraining the Higgs sector of the model, finding that viable scenarios can be obtained for a reasonably light Higgs spectrum. We also take into account the tree-level contributions to indirect CP violation, showing that the experimental value of $\epsilon_K$ can be accommodated in the present framework.

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