New-physics effects on triple-product correlations inΛbdecays
- Resource Type
- Authors
- Alakabha Datta; David London; Wafia Bensalem
- Source
- Physical Review D. 66
- Subject
- Physics
Nuclear and High Energy Physics
Particle physics
010308 nuclear & particles physics
Physics beyond the Standard Model
Order (ring theory)
Supersymmetry
Lambda
01 natural sciences
Pseudoscalar meson
Factorization
Triple product
0103 physical sciences
Variety (universal algebra)
010306 general physics
Computer Science::Databases
- Language
- ISSN
- 1089-4918
0556-2821
We adopt an effective-Lagrangian approach to compute the new-physics contributions to T-violating triple-product correlations in charmless ${\ensuremath{\Lambda}}_{b}$ decays. We use factorization and work to leading order in the heavy-quark expansion. We find that the standard-model (SM) predictions for such correlations can be significantly modified. For example, triple products which are expected to vanish in the SM can be enormous $(\ensuremath{\sim}50%)$ in the presence of new physics. By measuring triple products in a variety of ${\ensuremath{\Lambda}}_{b}$ decays, one can diagnose which new-physics operators are or are not present. Our general results can be applied to any specific model of new physics by simply calculating which operators appear in that model.