CP violation in three-body chargino decays
Journal Article
·
· Physical Review. D, Particles Fields
- Physique des Particules, Universite de Montreal, C.P. 6128, succursale centre-ville, Montreal, QC, Canada H3C 3J7 (Canada)
- Physics and Engineering Department, Taylor University, 236 West Reade Avenue, Upland, Indiana 46989 (United States)
CP violation in supersymmetry can give rise to rate asymmetries in the decays of supersymmetric particles. In this work we compute the rate asymmetries for the three-body chargino decays {chi}-tilde{sub 2}{sup {+-}}{yields}{chi}-tilde{sub 1}{sup {+-}}HH, {chi}-tilde{sub 2}{sup {+-}}{yields}{chi}-tilde{sub 1}{sup {+-}}ZZ, {chi}-tilde{sub 2}{sup {+-}}{yields}{chi}-tilde{sub 1}{sup {+-}}W{sup +}W{sup -} and {chi}-tilde{sub 2}{sup {+-}}{yields}{chi}-tilde{sub 1}{sup {+-}}ZH. Each of the decays contains contributions mediated by neutral Higgs bosons that can possibly go on shell. Such contributions receive a resonant enhancement; furthermore, the strong phases required for the CP asymmetries come from the widths of the exchanged Higgs bosons. Our results indicate that the rate asymmetries can be relatively large in some cases, while still respecting a number of important low-energy bounds such as those coming from B meson observables and electric dipole moments. For the parameters that we consider, rate asymmetries of order 10% are possible in some cases.
- OSTI ID:
- 21325497
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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