Consequences of $b\to s{\mu }^{+}{\mu }^{-}$ anomalies on $B\to K^{(\ast )}\nu \bar{\nu }$, $B_s\to (\eta ,{\eta }^{\prime })\nu \bar{\nu }$ and $B_s\to \varphi \nu \bar{\nu }$ decay observables

Abstract

The long persistent discrepancies in $b\to s\ell \ell$ quark level transitions continue to be the ideal platform for an indirect search of new physics that lies beyond the SM. The measurements of $R_K$, $R_{K^{\ast }}$, $P_5^{\prime }$, $\mathcal{B}(B_s\to \varphi {\mu }^{+}{\mu }^{-})$ and $\mathcal{B}(B_s\to {\mu }^{+}{\mu }^{-})$ persistently deviate from the standard model expectations. Similarly, the new tests of lepton flavor universality performed using the isospin partners such as $B^0\to K_S^0\ell \ell$ and $B^{+}\to K^{+\ast }\ell \ell$ exhibit the same pattern of deviation in $R_{K_S^0}$ and $R_{K^{\ast +}}$ with the existing results. Motivated by these anomalies we search for the patterns of new physics in the family of flavor changing neutral decays with neutral leptons in the final state undergoing $b\to s\nu \bar{\nu }$ quark level transitions. There are close relations between $b\to s\ell \ell$ and $b\to s\nu \bar{\nu }$ transitions not only in standard model but also in various beyond the standard model scenarios. For beyond the standard model physics under the $\mathrm{S}{\mathrm{U}}_{\mathrm{L}}(2)$ gauge symmetry one can relate the left handed charged leptons to the neutrinos. Moreover, there are several advantages of studying $b\to s\nu \bar{\nu }$ transitions over $b\to s\ell \ell$ as they are free from various hadronic uncertainties beyond the form factors such as the non-factorizable corrections and photonic penguin contributions. Hence, we explore the consequences of $b\to s{\mu }^{+}{\mu }^{-}$ anomalies on $B\to K^{(\ast )}\nu \bar{\nu }$, $B_s\to (\eta ,{\eta }^{\prime })\nu \bar{\nu }$ and $B_s\to \varphi \nu \bar{\nu }$ decay observables in SMEFT platform within various 1D and 2D new physics scenarios.

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• Revisiting $B\to K^{(\ast )}\nu \bar{\nu }$ decays in the Standard Model and beyond
• Understanding the first measurement of $\mathcal{B}(B\to K\nu \bar{\nu })$
• When Energy Goes Missing: New Physics in $b\to s\nu \nu$ with Sterile Neutrinos
• Assessing Lepton Flavor Universality Violations in Semileptonic Decays
• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state