405 research outputs found
Light Higgsino and Gluino in -invariant Direct Gauge Mediation
We provide a simple solution to the - problem in the
"-invariant direct gauge mediation model". With the solution, the Higgsino
and gluino are predicted to be light as GeV and
TeV, respectively. Those gluino and Higgsino can be accessible
at the LHC and future collider experiments. Moreover, dangerous dimension five
operators inducing rapid proton decays are naturally suppressed by the
-symmetry.Comment: 14 pages, 3 figure
Model independent evaluation of the Wilson coefficient of the Weinberg operator in QCD
We derive a Wilson coefficient of a CP-violating purely gluonic dimension-6
operator called the Weinberg operator () generated by a scalar and
two fermions at the two-loop level. We do not specify the representation of
SU(3) for the scalar and the fermions, and thus our result can be applied
to a variety of models beyond the standard model. We estimate the nucleon EDMs
induced by the Weinberg operator in some examples and discuss the importance of
measuring EDMs. It is found that future measurements of the EDMs can probe
physics at higher energy scale beyond the reach of collider experiments.Comment: 22 pages, 7 figures; v2: version accepted by JHEP; v3: Eq. (4.2) is
added, Table 1 is extende
Lepton flavor violations in SUSY models for muon with right-handed neutrinos
We consider supersymmetric (SUSY) models for the muon anomaly without
flavor violating masses at the tree-level. The models can avoid LHC constraints
and the vacuum stability constraint in the stau-Higgs potential. Although large
flavor violating processes are not induced within the framework of minimal SUSY
standard model, once we adopt a seesaw model, sizable lepton flavor violating
(LFV) processes such as and conversion are
induced. These LFV processes will be observed at future experiments such as
MEG-II, COMET and Mu2e if right-handed neutrinos are heavier than GeV
motivated by the successful leptogenesis. This conclusion is somewhat model
independent since Higgs doublets are required to have large soft SUSY breaking
masses, leading to flavor violations in a slepton sector via neutrino Yukawa
interactions.Comment: 23 pages, 12 figure
- …