31 citations · 68 across the 4 of their papers we have counts for
8 papers · 1 filter
A Test for Light Gravitino Scenario at the LHC
Satoshi Shirai, T. T. Yanagida
Supersymmetric (SUSY) standard models in which the lightest SUSY particle (LSP) is an ultralight gravitino (m_{3/2}=O(1) eV) are very attractive, since they are free from the cosmo…
R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida
We show that R-parity violating decay of Wino dark matter of mass \sim 3 TeV can naturally account for the flux and spectral shape of the cosmic-ray electrons and positrons observe…
Measuring lifetimes of long-lived charged massive particles stopped in LHC detectors
Shoji Asai, Koichi Hamaguchi, Satoshi Shirai
Long-lived charged massive particles (CHAMPs) appear in various particle physics models beyond the Standard Model. In this Letter, we discuss the prospects for studying the stoppin…
Gauge Mediation with Sequestered Supersymmetry Breaking
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida +1
Gauge mediation models have two drawbacks, that is, the so-called μ-problem and a lack of predictability of the gravitino dark matter abundance. We show that conformal sequestering…
Strongly Interacting Gauge Mediation at the LHC
Koichi Hamaguchi, Eita Nakamura, Satoshi Shirai +1
Strongly interacting gauge mediation (SIGM) of supersymmetry breaking is very attractive, since it naturally predicts a light gravitino of mass $\lsim{\cal O}(10)$ eV, which causes…
Determining the mass for an ultralight gravitino at LHC
K. Hamaguchi, S. Shirai, T. T. Yanagida
In supersymmetric (SUSY) models with the gravitino being the lightest SUSY particle (LSP), the SUSY breaking scale (i.e., the gravitino mass) could be determined by measuring the l…