The absence of supersymmetric particles at the weak scale is a puzzle if
supersymmetry solves the gauge hierarchy problem. We show that, if the
right-handed neutrino masses arise from hidden gaugino condensation via
GUT-suppressed operators, succe...
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 t...
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. Tho...
We investigate decay modes of spin-1 heavy vector bosons () from the
viewpoint of perturbative unitarity in a model-independent manner. Perturbative
unitarity requires some relations among couplings. The relations are called
unitarity sum rule...
We investigate interpretations for the ATLAS 2 TeV diboson anomalies.
The roles of the unitarity sum rules, which ensure the perturbativity of the
longitudinal vector boson scattering amplitudes, are emphasized. We find the
unitarity sum rule...
We study the phenomenology of singlet Dirac fermion dark matter in the
simplified models where the dark matter interacts with the Standard Model
particles at loop-level with the help of either colored or non-colored
mediators. We especially focus ...
We study perturbative unitarity and electroweak oblique corrections in the
electroweak symmetry breaking models including an arbitrary number of neutral
Higgs bosons. Requiring the perturbative unitarity of the high energy
scattering amplitudes of...
tuhep.phys.tohoku.ac.jp