144 research outputs found
Implications of Muon anomalous magnetic moment for Direct detection of Neutralino Dark Matter
We investigate the implications of the recent measurement of muon anomalous
magnetic moment for the direct detection of neutralino dark matter in the three
different SUSY models: mSUGRA, a model with non-universal Higgs mass, and an
SO(10) GUT model. We consider two extreme scenario for bound,
i.e. (1 bound)
and ( below). In mSUGRA model,
the counting ratio may be above the sensitivity of the future experiments when
parameters are within bound of . However, the
tends to be high compared to the currently favored value
. For models with the non-universal scalar masses, the possibility
to have the consistent and the high counting ratio is open up
in the region of parameter space where Higgsino mass is smaller than
mSUGRA prediction. In particular, in the SO(10) model, the LSP dark matter
detection rate may be enhanced by almost one order of magnitude compared to
mSUGRA and the model with non-universal Higgs mass, for cosmologically
acceptable . The highest detection rate of LSP dark matter
occurs in the region where the LSP constitutes a subdominant part of local halo
DM. Implication of SUSY mass parameter measurement under the cosmological
constraint is also discussed
Prospects for Spin-1 Resonance Search at 13 TeV LHC and the ATLAS Diboson Excess
Motivated by ATLAS diboson excess around 2 TeV, we investigate a
phenomenology of spin-1 resonances in a model where electroweak sector in the
SM is weakly coupled to strong dynamics. The spin-1 resonances, W' and Z', are
introduced as effective degrees of freedom of the dynamical sector. We explore
several theoretical constraints by investigating the scalar potential of the
model as well as the current bounds from the LHC and precision measurements. It
is found that the main decay modes are V' -> VV and V' -> Vh, and the V' width
is narrow enough so that the ATLAS diboson excess can be explained. In order to
investigate future prospects, we also perform collider simulations at the 13
TeV LHC, and obtain a model independent expected exclusion limit for the
process pp -> W' -> WZ -> JJ. We find a parameter space where the diboson
excess can be explained, and are within a reach of the LHC at the integrated
luminosity of 10 fb-1 and 13 TeV.Comment: 38 pages, 19 figures, 1 table; minor changes, references added,
version published in JHE
Study of stop and sbottom at LHC
In supersymmetric models a gluino can decay into
through a stop or a sbottom. The decay chain produces an edge structure in the
distribution. Monte Carlo simulation studies show that the end point
and the edge height would be measured at the CERN LHC by using a sideband
subtraction technique. The stop and sbottom masses as well as their decay
branching ratios are constrained by the measurement. We study interpretations
of the measurement.Comment: 3 pages, 2 eps files, style files are included, talk at PASCOS'03,
Mumbai, India, January 3-8, 200
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