Natural R parity, -term, and fermion mass hierarchy from discrete gauge symmetries
Dec, 200221 pages
Published in:
- Nucl.Phys.B 660 (2003) 322-342
- Published: 2003
e-Print:
- hep-ph/0212245 [hep-ph]
Report number:
- OSU-HEP-02-17
View in:
Citations per year
Abstract:
In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R-parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of the \mu-term (the Higgsino mass parameter) via the Giudice--Masiero mechanism. The discrete gauge anomalies are cancelled by a discrete version of the Green--Schwarz mechanism. The simplest symmetry group is found to be Z_4 with a charge assignment that is compatible with grand unification. Several other Z_N gauge symmetries are found for N=10,12,18,36 etc, with some models employing discrete anomaly cancellation at higher Kac-Moody levels. Allowing for a flavor structure in Z_N, we show that the same gauge symmetry can also explain the observed hierarchy in the fermion masses and mixings.- supersymmetry
- neutrino: mass generation
- R parity
- symmetry: discrete
- symmetry: gauge
- anomaly
- algebra: Kac-Moody
- fermion: mass
- fermion: mixing angle
- mu-problem
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