Bounds on new physics fromB→V1V2decays

Abstract

We consider the possibility that physics beyond the standard model contributes to the decays B → V 1 V 2 , where V 1 and V 2 are vector mesons. We show that a time-dependent angular analysis of B → V 1 V 2 decays provides many tests for this new physics (NP). Furthermore, although one cannot solve for the NP parameters, we show that this angular analysis allows one to put bounds on these parameters. This can be useful in estimating the scale of NP, and can tell us whether any NP found directly at future high-energy colliders can be responsible for effects seen in B → V 1 V 2 decays.

Measurement of the polarization amplitudes inB0→J/ψK*(892)0decays

“…In the SM, the amplitudes for the decay and its charge conjugate are equal, but in the presence of physics beyond the SM (BSM) the loop contributions could be enhanced and introduce CP-violating differences between the B 0 and " B 0 decay amplitudes [7][8][9]. An analysis of the angular distributions of the decay products gives increased sensitivity to BSM physics through differences in the individual amplitudes [10].…”

Effect of supersymmetric right-handed flavor mixing onBsdecays

“…can distinguish between the CP-even and CP-odd components of the full amplitude, with 6 measurable components associated with the angles describing the kinematics [8,16]. The current experimental result for the branching fraction is [6].…”

Generalized analysis onB→K*ρwithin and beyond the standard model: Can it help understand theB→Kπpuzzle?

“…Then, by comparing the determined parameters with theoretical predictions, one can further investigate possible NP effects appearing in B → K * ρ decay processes [20]. In the next section we discuss in details how the determination of these parameters in terms of the observables can be used to verify the hierarchy relations between the topological amplitudes that are conventionally assumed to be true in the SM.…”