Authors
Masahiro Kawasaki, Masaki Yamada
Publication date
2013/1/15
Journal
Physical Review D—Particles, Fields, Gravitation, and Cosmology
Volume
87
Issue
2
Pages
023517
Publisher
American Physical Society
Description
The Affleck-Dine mechanism, which is one of the most attractive candidates for baryogenesis in supersymmetric theories, often predicts the existence of baryonic -balls in the early universe. In this scenario, there is a possibility to explain the observed baryon-to-dark-matter ratio because -balls decay into supersymmetric particles as well as quarks. If the gravitino mass is small compared to the typical interaction energy, the longitudinal component of the gravitino behaves like the massless goldstino. We numerically calculate the goldstino production rates from -balls in the leading semiclassical approximation without using the large-radius limit or effective coupling. We also calculate the quark production rates from -balls in the Yukawa theory with a massive fermion. In deriving the decay rate we also take into account the scalar field configuration of the -ball. These results are applied to a realistic model in the …
Total citations
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Scholar articles
M Kawasaki, M Yamada - Physical Review D—Particles, Fields, Gravitation, and …, 2013