Abstract
We use currently available data of nonleptonic charmless 2-body Brightarrow MM decays (MM !=! PP, PV, VV) that are mediated by brightarrow (d, s) QCD- and QED-penguin operators to study weak annihilation and new-physics effects in the framework of QCD factorization. In particular we introduce one weak-annihilation parameter for decays related by (uleftrightarrow d) quark interchange and test this universality assumption. Within the standard model, the data supports this assumption with the only exceptions in the Brightarrow K pi system, which exhibits the well-known “{varDelta } {mathcal{A}_mathrm{CP}} puzzle”, and some tensions in B rightarrow K^* phi . Beyond the standard model, we simultaneously determine weak-annihilation and new-physics parameters from data, employing model-independent scenarios that address the “{varDelta } {mathcal{A}_mathrm{CP}} puzzle”, such as QED-penguins and brightarrow s, bar{u}u current-current operators. We discuss also possibilities that allow further tests of our assumption once improved measurements from LHCb and Belle II become available.
Highlights
Nonleptonic charmless 2-body decays B → M M, with final state mesons M M = (P P, P V, V V ), form a large class of decays that allow one to test in principle the underlying tree and penguin topologies at the parton level, as predicted by the standard model (SM)
The subclass of QCD- and QED-penguin-dominated decays are sensitive to new physics (NP) beyond the SM, as any other b → (d, s) flavor-changing neutral-current (FCNC) process, which makes them valuable probes of the according shortdistance couplings
We perform in a second step a simultaneous fit of ρA and ρH to a modified set of B → K π observables, and discuss the possibility to discern large color-suppressed tree contributions in future measurements of CP asymmetries with K 0π 0 final states
Summary
The subclass of QCD- and QED-penguin-dominated decays are sensitive to new physics (NP) beyond the SM, as any other b → (d, s) flavor-changing neutral-current (FCNC) process, which makes them valuable probes of the according shortdistance couplings In this respect, systematic expansions in the heavy bottom quark mass, mb, yield at leading order in 1/mb a simplified representation of hadronic 2-body matrix elements in terms of rather well-known heavy-to-light form factors and distribution amplitudes (DA) of the involved mesons. The 2-body decays of B mesons into final states f = P P, P V, Vh Vh with light charmless pseudoscalar (P) and/or vector (Vh) mesons with polarization mode h = L , ⊥, provide various observables in time-integrated, timedependent, and angular analyses These are reviewed in the first part of this section, whereas in the second part the according available experimental data is listed that has been used in the fits
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