New minimal extension of MSSM

The minimal U(1)′ extension of the MSSM

Motivated by the apparent need for extending the MSSM and perhaps mitigating naturalness problems associated with the μ parameter and fine-tuning of the soft masses, we augment the MSSM spectrum by a SM gauge singlet chiral superfield, and enlarge the gauge structure by an additional U(1) invariance, so that the gauge and Higgs sectors are relatively secluded. One crucial aspect of U(1) models ...

Muon g–2 and Neutrino Mass in a New Minimal Extension of the MSSM

If the one term (ν̂eμ̂ − êν̂μ)τ̂ c is added to the MSSM (Minimal Supersymmetric Standard Model) superpotential, the recently observed muon g–2 (anomalous magnetic moment) excess can be explained very simply by a light ν̃e. If the soft symmetrybreaking terms ν̂αĥ 0 2 − l̂αĥ2 are also added, realistic neutrino masses (with bimaximal mixing) are generated as well. ————– Talk given at the 7th Hellenic Sch...

New and Useful Gauge Extension of the MSSM

A new nontrivial U(1) gauge extension of the Minimal Supersymmetric Standard Model (MSSM) is proposed which automatically conserves baryon number and lepton number, and solves the μ problem. Naturally small Dirac neutrino masses are also possible in this context. • Talk at TH-2002, Paris, July 2002. If the minimal standard model of quarks and leptons (SM) is extended to include supersymmetry, 3...

Minimal Supersymmetric Standard Model (MSSM)

Predicting the Seesaw Scale in a Minimal Bottom-Up Extension of MSSM

Abstract We analyze a minimal bottom-up seesaw scenario where we require the theory to satisfy three phenomenological conditions: (i) it is supersymmetric; (ii) it has a local B − L symmetry as part of the SU(2)L × SU(2)R × U(1)B−L gauge theory to implement the seesaw mechanism and (iii) B − L symmetry breaking is such that it leaves R-parity unbroken giving a naturally stable dark matter. We s...