New Physics in b -> s Transitions and the B_{d,s}^0 -> V_1 V_2 Angular Analysis

Abstract

We suppose that there is new physics (NP) in b -> s transitions, and examine its effect on the angular distribution of B_q^0 -> V_1 V_2 (q=d,s), where V_{1,2} are vector mesons. We find that, in the presence of such NP, the formulae relating the parameters of the untagged, time-integrated angular distribution to certain observables (polarization fractions, CP-violating triple-product asymmetries, CP-conserving interference term) must be modified from their standard-model forms. This modification is due in part to a nonzero B^0_q-Bbar^0_q width difference, which is significant only for B^0_s decays. We re-analyze the B^0_s -> phi phi data to see the effect of these modifications. As (Delta Gamma_s/2)/Gamma_s ~ 10%, there are O(10%) changes in the derived observables. These are not large, but may be important given that one is looking for signals of NP. In addition, if the NP contributes to the b -> s decay, the measurement of the untagged time-dependent angular distribution provides enough information to extract all the NP parameters.

29 pages, 6 figures

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• Rare Decays and CP Violation in the $B_s$ System
• Four-body decays $B_{(s)}\to (K\pi {)}_{S/P}(K\pi {)}_{S/P}$ in the perturbative QCD approach
• Searching for New Physics with bbar -> sbar Bs -> V_1 V_2 Penguin Decays
• Measurement of CP violation in $B_s^0\to \varphi \varphi$ decays
• Study of $B_{(s)}\to (\pi \pi )(K\pi )$ decays in the perturbative QCD approach
• Measurement of CP violation in the $B_s^0\to \varphi \varphi$ decay and search for the $B^0\to \varphi \varphi$ decay
• Reducing Penguin Pollution
• Precision measurement of $CP$ violation in the penguin-mediated decay $B_s^0\to \varphi \varphi$
• $CP$-violating observables in four-body $B\to \varphi (\to K\bar{K})K^{\ast }(\to K\pi )$ decays
• T-odd Observables in Elastic Scattering, in Deep Inelastic Processes and in Weak Decays