New Stringy Instanton Effects And Neutrino Majorana Masses

Journal Article · Wed Oct 03 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2803809· OSTI ID:21035957

Cvetic, M; Richter, R; Weigand, T ^[1]

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1. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104-6396 (United States)

D-brane instantons can generate open string couplings in the superpotential which violate global abelian symmetries and are therefore perturbatively forbidden. After discussing the main ingredients, focussing for concretenes on Type IIA orientifold compactifications, we exemplify the computation of instanton-induced Majorana mass terms for right-handed neutrinos in a local SU(5) GUT-like model. In particular, we show that the instanton allows for naturally engineering the intermediate scale of the Majorana masses, thereby realizing the seesaw mechanism for neutrinos.

• OSTI ID: 21035957
• Journal Information: AIP Conference Proceedings, Vol. 939, Issue 1; Conference: International workshop on theoretical high energy physics, Roorkee (India), 15-20 Mar 2007; Other Information: DOI: 10.1063/1.2803809; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CALCULATION METHODS
COMPACTIFICATION
D-BRANES
GRAND UNIFIED THEORY
INSTANTONS
NEUTRINOS
POTENTIALS
REST MASS
STRING MODELS
STRING THEORY
SU-5 GROUPS
SUPERSYMMETRY