Braun, V., He, Y., Ovrut, B. A. & Pantev, T. (2006). Moduli dependent muterms in a heterotic standard model. Journal of High Energy Physics, 2006(JHEP03), 006  006. doi: 10.1088/11266708/2006/03/006

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Abstract
In this paper, we present a formalism for computing the nonvanishing Higgs muterms in a heterotic standard model. This is accomplished by calculating the cubic product of the cohomology groups associated with the vector bundle moduli (phi), Higgs (H) and Higgs conjugate (Hbar) superfields. This leads to terms proportional to phi H Hbar in the low energy superpotential which, for nonzero moduli expectation values, generate moduli dependent muterms of the form <phi> H Hbar. It is found that these interactions are subject to two very restrictive selection rules, each arising from a Leray spectral sequence, which greatly reduce the number of moduli that can couple to HiggsHiggs conjugate fields. We apply our formalism to a specific heterotic standard model vacuum. The nonvanishing cubic interactions phi H Hbar are explicitly computed in this context and shown to contain only four of the nineteen vector bundle moduli.
Item Type:  Article 

Uncontrolled Keywords:  Superstrings and Heterotic Strings, Higgs Physics, Superstring Vacua, Supersymmetric Standard Model 
Subjects:  Q Science > QC Physics 
Divisions:  School of Engineering & Mathematical Sciences > Department of Mathematical Science 
URI:  http://openaccess.city.ac.uk/id/eprint/860 
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