The NMSSM and String Theory

Details The NMSSM and String Theory The NMSSM and String Theory

2009-12-02

arxiv.org/abs/0912.0477v2

Phys.Lett.B684:48-51,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages; v2: typos corrected

Scientific paper

10.1016/j.physletb.2009.12.058

We study the possibility of constructing the NMSSM from the heterotic string. String derived NMSSMs are much more rare than MSSMs due to the extra requirement that there exist a light singlet which couples to the Higgs pairs. They share the common feature that the singlet self-interactions are typically suppressed, leading to either the "decoupling" or the Peccei-Quinn limit of the NMSSM. In the latter case, the spectrum contains a light pseudoscalar which may be relevant to the MSSM fine-tuning problem. We provide a Z_6 heterotic orbifold example of the NMSSM with approximate Peccei-Quinn symmetry, whose origin lies in the string selection rules combined with our choice of the vacuum configuration.

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