New Physics in $b\to s\ell \ell$ anomalies and its implications for the complementary neutral current decays

Abstract

We study the Standard Model and the new physics predictions for the lepton-flavour-universality violating (LFUV) ratios in various $b\to s{\ell }^{+}{\ell }^{-}$ channels with scalar, pseudoscalar, vector, axial-vector, and $\Lambda$ baryon final states, considering both unpolarized and polarized final state hadrons. In order to formulate physical observables, we use the model independent effective Hamiltonian approach and employ the helicity formalism. We provide the explicit expressions of the helicity amplitudes in terms of the Wilson coefficients and the hadronic form factors by using the same kinematical configuration and polarization conventions for all the decay channels.We perform the numerical analysis with new physics scenarios selected from the recent global fits to $b\to s{\ell }^{+}{\ell }^{-}$ data, having specific new physics model interpretations. We find that some of the LFUV ratios for these complementary channels in different kinematical regions have high sensitivity to new physics and the future measurements of them in Belle II and LHCb experiments, along with testing new physics/LFUV, can help to distinguish among some of the different new physics possibilities.

42 pages, 6 figures, 13 tables; version accepted for publication in NPB

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Cited by in corpus (5)

• Implications of new evidence for lepton-universality violation in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Cornering the Two Higgs Doublet Model Type II
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• Discriminating 1D new physics solutions in $b\to s\ell \ell$ decays
• New physics in $b\to s{e}^{+}{e}^{-}$: A model independent analysis