• Corpus ID: 133599570

New Physics in Γ s 12 : ( s̄b ) ( τ̄ τ ) Operators

@inproceedings{Bobeth2011NewPI,
  title={New Physics in $\Gamma$ s 12 : ( s̄b ) ( $\tau$̄ $\tau$ ) Operators},
  author={Christoph Bobeth and U. Haisch},
  year={2011}
}

• C. Bobeth, U. Haisch
• Published 2011
• Physics

Measurements performed at the Tevatron of both the like-sign dimuon charge asymmetry inBd,s-meson samples and the mixing-induced CP asymmetry inBs → J/ψφ depart from their standard model (SM) predictions. This could be an indication for new CP phases in ∆B = 2 transitions, preferentially in Bs–B̄s mixing. The experimental situation, however, remained inconclusive, as it favored values of the element Γ12 of the decay matrix in the Bs-meson system that are notably different from the SM expectation, suggesting the presence of new physics in the ∆B = 1 sector as well. The very recent LHCb measurements of Bs → J/ψφ and Bs → J/ψf0, which do not find any evidence for a new-physics phase in the element M s 12 of the mass matrix, point into this direction as well. In this article, we explore the potential size of non-standard effects in Γ12 stemming from dimension-six operators with flavor content (s̄b)(τ̄ τ). We show that since the existing constraints imposed by treeand loop-level mediated Bd,s-meson decays are quite loose, absorptive new physics of this type can in part explain the current data. Our model-independent conclusions are finally contrasted with explicit analyses of the new-physics effects in Bs–B̄s mixing that can arise from leptoquarks or Z ′ bosons. ar X iv :1 10 9. 18 26 v2 [ he pph ] 1 6 O ct 2 01 1