PAMELA and Fermi LAT Signals from Long-Lived Kaluza-Klein Dark Matter

dc.contributor.authorOkada, Nobuchika
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-05-20T17:58:08Z
dc.date.available2019-05-20T17:58:08Z
dc.date.issued2009-10-09
dc.description.abstractWe propose a simple extension of the minimal universal extra dimension model by introducing a small curvature. The model is formulated as a small anti–de Sitter curvature limit of the five-dimensional standard model (SM) in the Randall-Sundrum background geometry. While the lightest Kaluza-Klein (KK) particle can be thermal relic dark matter as usual in the universal extra dimension model, the KK parity is explicitly broken in the presence of the small curvature and the KK dark matter decays into the SM fermions with a long lifetime. Couplings of the KK dark matter with SM fermion pairs in the five-dimensional bulk are controlled by fermion bulk masses. By tuning bulk masses of quarks, we can suppress KK dark matter decay into quarks. With a suitable choice of bulk masses for leptons, KK dark matter decay into leptons can account for the cosmic-ray electron/positron excesses reported by the recent PAMELA and Fermi LAT satellite experiments.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5587
dc.languageEnglish
dc.language.isoen_US
dc.subjectParticle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)
dc.subjectString and brane phenomenology
dc.subjectDark matter (stellar, interstellar, galactic, and cosmological)
dc.subjectCosmic rays (including sources, origin, acceleration, and interactions)
dc.titlePAMELA and Fermi LAT Signals from Long-Lived Kaluza-Klein Dark Matteren_US
dc.typetext
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