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R-parity breaking via type II seesaw, decaying gravitino dark matter and PAMELA positron excess

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
677
Issue
5
Identifiers
DOI: 10.1016/j.physletb.2009.05.051
Keywords
  • Phenomenology
Disciplines
  • Physics

Abstract

Abstract We propose a new class of R-parity violating extension of MSSM with type II seesaw mechanism for neutrino masses where an unstable gravitino is the dark matter of the Universe. It decays predominantly into three leptons final states, thereby providing a natural explanation of the positron excess but no antiproton excess in the PAMELA experiment. The model can explain neutrino masses without invoking any high scale physics while keeping the pre-existing baryon asymmetry of the universe in tact.

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