Opening the window to the cogenesis with Affleck-Dine mechanism in gravity mediation

Ayuki Kamada, Masahiro Kawasaki, Masaki Yamada

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The observed baryon and dark matter densities are equal up to a factor of 5. This observation indicates that the baryon asymmetry and dark matter have the same origin. The Affleck-Dine baryogenesis is one of the most promising mechanisms in this context. Q balls, which are often formed in the early Universe associated with the Affleck-Dine baryogenesis, decay both into supersymmetric particles and into quarks. Recently, it was pointed out that annihilation of squarks into quarks gives a dominant contribution to the Q-ball decay rate and the branching ratio of Q-ball decay into supersymmetric particles changes from the previous estimate. In this Letter, the scenario of baryon and dark matter cogenesis from Q ball in gravity mediation is revisited in respect of the improved Q-ball decay rates. It is found that the successful cogenesis takes place when a wino with mass 400-600 GeV is dark matter.

Original languageEnglish
Pages (from-to)9-13
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume719
Issue number1-3
DOIs
Publication statusPublished - 2013 Feb 12
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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