Cosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP

Simple item page
dc.creatorKanzaki, Toru
dc.creatorKawasaki, Masahiro
dc.creatorKohri, Kazunori
dc.creatorMoroi, Takeo
dc.date2006-09-25
dc.date.accessioned2026-07-07T10:25:30Z
dc.date.available2026-07-07T10:25:30Z
dc.descriptionWe study the scenario where a sneutrino is the next lightest supersymmetric particle (NLSP) and decays into a gravitino and standard model particles. The daughter particles such as neutrinos and quarks cause electro- and hadronic showers and affect big-bang nucleosynthesis. It is found that despite a small branching ratio, four-body processes including quarks in the final state give the most stringent constraint on the sneutrino abundance for gravitino mass of 1 $-$ 100 GeV. Pion production by high energy neutrinos is important when the sneutrinos decay at $\sim$ 1 sec. We also discuss the thermal leptogenesis in the sneutrino NLSP scenario.
dc.description20 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0609246
dc.identifierhttp://arxiv.org/abs/hep-ph/0609246
dc.identifierPhys.Rev.D75:025011,2007
dc.identifierdoi:10.1103/PhysRevD.75.025011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176563
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP
dc.typetext

Files

Collections

arXiv