Investigation of noscale supersymmetry breaking models with a gauged U(1)_{B-L} symmetry
arXiv:hep-ph/0202038 · doi:10.1103/PhysRevD.66.035002
Abstract
Noscale supersymmetry (SUSY) breaking model is investigated in the minimal extension of the minimal supersymmetric standard model (MSSM) with a gauged U(1)_{B-L} symmetry. We specifically consider a unification-inspired model with the gauge groups SU(3)_{C} \times SU(2)_{L} \times U(1)_Y \times U(1)_{B-L} \subset SU(5) \times U(1)_{5} for illustration. While the noscale boundary condition at the grand unification scale (M_{G}\simeq 2\times 10^{16} GeV) in the MSSM is not consistent with phenomenological constraints, we show that it is if the gaugino of the U(1)_{5} multiplet is several times heavier than the gauginos of the MSSM. However, if SU(5) \times U(1)_{5} is further embedded in a larger simple group, e.g. SO(10), the noscale boundary condition at M_{G} is inconsistent with phenomenological constraints. If we relax the noscale boundary condition and allow non-zero soft scalar masses for the Higgs fields which spontaneously break the U(1)_{5} symmetry, the resultant spectrum of SUSY particles becomes consistent with all the phenomenological constraints, even if we impose the GUT relation on the gauge coupling and the gaugino mass of the U(1)_{5}. In this case, the SUSY CP problem is also solved, since the condition Bμ=0 at the boundary can be imposed consistently with the electroweak symmetry breaking.
23 pages, 5 eps figures
References in corpus (6)
- SOFTSUSY: a program for calculating supersymmetric spectra
- Branching Fraction and Photon Energy Spectrum b -> s gamma
- Proposed Post-LEP Benchmarks for Supersymmetry
- Neutrino Masses and Lepton-Flavor Violation in Supersymmetric Models with lopsided Froggatt-Nielsen charges
- Lower Limits on Soft Supersymmetry-Breaking Scalar Masses
- Higgs mass and b to s gamma constraints on SUSY models with no-scale boundary condition