On the Effective Theory of Low Scale Orientifold String Vacua

Details On the Effective Theory of Low Scale Orientifold String Vacua On the Effective Theory of Low Scale Orientifold String Vacua

2005-10-25

arxiv.org/abs/hep-ph/0510332v2

Nucl.Phys. B746 (2006) 77-135

Physics

High Energy Physics

High Energy Physics - Phenomenology

73 pages, 2 figs (v2) Macro problems fixed, typo corrected

Scientific paper

10.1016/j.nuclphysb.2006.04.009

The effective field theory of the minimal Low Scale Orientifold Models is developed. It describes universal features of related orientifold vacua in string theory. It contains, beyond the Standard Model fields, an MSSM-like Higgs sector and three anomalous (massive) U(1) gauge bosons. All renormalizable couplings are included as well as some dimension-five couplings that are important for anomaly cancellation. The Higgs symmetry breaking induces mixing between the anomalous U(1) gauge bosons and the photon and $Z^0$. This mixing as well as the anomaly generated cubic vector boson couplings is potentially important for discriminating such models from other theories containing Z's. Some interesting tree-level processes are also evaluated.

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