7–12 Feb 2022
Institute of Physics, Bhubaneswar
Asia/Kolkata timezone

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

Not scheduled
20m
Institute of Physics, Bhubaneswar

Institute of Physics, Bhubaneswar

Sachivalaya Marg, Bhubaneswar - 751005, India.
Contributory talks

Speaker

Rajeev N

Description

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 standard model. The recent updated measurements of $R_K$, $\mathcal{B}(B_s\, \to\, \phi\, \mu^+\,\mu^-)$
and $\mathcal{B}(B_s\, \to\, \mu^+\,\mu^-)$ from LHCb persistently deviate from the standard model expectations at the level of $3.1\sigma$ in $R_K$ and
$3.6\sigma$ in $\mathcal{B}(B_s\, \to\, \phi\, \mu^+\,\mu^-)$. Similarly, the measurements of $R_{K^*}$ and $P_5^{\prime}$ in $B \to K^{*} \, \ell\,\ell$ decays
still continue to disagree with the standard model at $\sim 2.4\sigma$ and $\sim 3.3\sigma$ respectively.
Similarly the new tests of lepton flavor universality performed using the isospin partners such as $B^0 \, \to \, K_S^{0} \, \ell\,\ell$ and $B^+ \, \to \, K^{+*} \, \ell\,\ell$
exhibit the same pattern of deviation with the previous results. The new ratios $R_{K_S^0}$ and $R_{K^{*+}}$ stand respectively at $1.4\sigma$ and $1.5\sigma$ away and
the combination of both stand at $2\sigma$ away from the standard model expectations. 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 in the analysis of $b\,\to\,s\, \ell\, \ell$ 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 $\rm SU_L(2)$ 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 $B \, \to \, K^{(*)} \,\nu \, \bar{\nu}$,
$B_s \to\, (\eta,\eta') \, \nu\,\bar{\nu}$ and $B_s \, \to \, \phi \, \nu \, \bar{\nu}$ decay observables in SMEFT platform within various 1D and 2D new physics
scenarios.

Primary authors

Rajeev N Rupak Dutta (University of Kentucky)

Presentation materials

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