Singlet extensions of the MSSM in the quiver landscape

Mirjam Cvetič, James Halverson, Paul Langacker

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17 Scopus citations


We map out possible extensions of the MSSM in the context of type II string theory. We systematically investigate three-stack and four-stack quivers which realize the MSSM spectrum with the addition of a single MSSM singlet S with an allowed SHuHd term, which can lead to a dynamical electroweak-scale μ-term. We present the three quivers which satisfy stringent string-theoretic and phenomenological constraints, including the presence of non-zero masses for all three families of quarks and leptons, the perturbative and non-perturbative absence of R-parity violating couplings and rapid dimension-five proton decay, and a mechanism for small neutrino masses. We find that these quivers can realize many models in the class of singlet-extended (supersymmetric) standard models, as D-instanton effects can in principle generate a superpotential of the form f(S), where f is a polynomial. Finally, we address the issue of the stabilization and decoupling of charged moduli which generically appear in D-instanton corrections to the superpotential.

Original languageEnglish (US)
Article number76
JournalJournal of High Energy Physics
Issue number9
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • D-branes
  • Intersecting branes models
  • Superstring vacua


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