574 research outputs found
and Processes with Polarized Muon and Supersymmetric Grand Unified Theories
Lepton flavor violating processes and with
polarized muons are studied in the supersymmetric grand unified theory (SUSY
GUT). As a result of a detailed numerical calculation, it is shown that the P-
and T-odd asymmetries defined with the help of the muon polarization and the
ratio of two branching fractions make a good contrast between the SU(5) and
SO(10) SUSY GUT. These observables are useful to extract differences of the two
theories. In particular, the P-odd asymmetry of varies
100%--100% in SO(10) whereas it is 100% in SU(5) and the T-odd asymmetry of
can reach 15% in SU(5) within the EDM constraints whereas it is
small in SO(10).Comment: 9pages. Talk given at the Workshop on High Intensity Muon Sources
(HIMUS99), Tsukuba, Japan, 1-4 Dec 199
Relic abundance and detection prospects of neutralino dark matter in mirage mediation
We analyze thermal relic abundance of neutralino dark matter and discuss
future prospects of its direct and indirect detections in mirage mediation.Comment: 8 pages, 12 figures. Talk given at the Dark Side of the Universe,
Madrid, June 20-24, 200
Mirage unification at TeV scale and natural electroweak symmetry breaking in minimal supersymmetry
We propose a new minimal supersymmetric scenario with virtually no
fine-tuning in the electroweak symmetry breaking. It favors light
supersymmetric spectrum below a few TeV and predicts definite relations among
stop and gaugino masses and LSP higgsino with GeV, which are
within the reach of coming LHC experiment.Comment: 4 pages, 2 figures, to appear in Proceedings of SUSY06, the 14th
International Conference on Supersymmetry and the Unification of Fundamental
Interactions, UC Irvine, California, 12-17 June 200
Flavor and CP conserving moduli mediated SUSY breaking in flux compactification
In certain class of flux compactification, moduli mediated supersymmetry
(SUSY) breaking preserves flavor and CP at leading order in the perturbative
expansion controlled by the vacuum expectation value of the messenger modulus.
Nevertheless there still might be dangerous flavor or CP violation induced by
higher order K\"ahler potential. We examine the constraints on such SUSY
breaking scheme imposed by low energy flavor and/or CP violating observables.
It is found that all phenomenological constraints can be satisfied even for
generic form of higher order K\"ahler potential and sparticle spectra in the
sub-TeV range, under plausible assumptions on the size of higher order
correction and flavor mixing angles. This implies for instance that mirage
mediation scheme of SUSY breaking, which involves such modulus mediation
together with an anomaly mediation of comparable size, and also the
modulus-dominated mediation realized in flux compactification can be free from
the SUSY flavor and CP problems, while giving gaugino and sfermion masses in
the sub-TeV range.Comment: 27 pages; corrected typos, added reference
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