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18 papers · 2 filters
MSSM inflaton: SUSY dark matter and LHC
A. Mazumdar
In this talk we will discuss how inflation can be embedded within a minimal extension of the Standard Model where the inflaton carries the Standard Model charges. There is no need…
Neutrino Signals from Annihilating/Decaying Dark Matter in the Light of Recent Measurements of Cosmic Ray Electron/Positron Fluxes
Junji Hisano, Masahiro Kawasaki, Kazunori Kohri +1
The excess of cosmic-ray electron and positron fluxes measured by the PAMELA satellite and ATIC balloon experiments may be interpreted as the signals of the dark matter annihilatio…
Cosmological scenario of stop NLSP with gravitino LSP and the cosmic lithium problem
Kazunori Kohri, Yudi Santoso
The discrepancy on Li^7 and Li^6 abundances between the observational data and the standard Big Bang Nucleosynthesis theory prediction has been a nagging problem in astrophysics an…
Perturbative Reheating and Gravitino Production in Inflationary Models
Raghavan Rangarajan, Narendra Sahu
The low reheat temperature at the end of inflation from the gravitino bound constrains the creation of heavy Majorana neutrinos associated with models of leptogenesis. However, a d…
Double vector quarkonia production in exclusive Higgs boson decays
V. Kartvelishvili, A. V. Luchinsky, A. A. Novoselov
Partial decay widths and branching fractions are calculated for the exclusive decays of the Standard Model Higgs boson into a pair of vector quarkonium states, $ H\to J/ψJ/ψ, H\to…
Positron/Gamma-Ray Signatures of Dark Matter Annihilation and Big-Bang Nucleosynthesis
Junji Hisano, Masahiro Kawasaki, Kazunori Kohri +1
The positron excess observed by the PAMELA experiment may come from dark matter annihilation, if the annihilation cross section is large enough. We show that the dark matter annihi…