Title: New physics in rare B decays after Moriond 2021

Abstract

Abstract The anomalies in rare B decays endure. We present results of an updated global analysis that takes into account the latest experimental input – in particular the recent results on $$$$R_K$$$$ $R_K$ and BR $$$$(B_s \rightarrow \mu ^+\mu ^-)$$$$ $(B_s\to {\mu }^{+}{\mu }^{-})$ – and that qualitatively improves the treatment of theory uncertainties. Fit results are presented for the Wilson coefficients of four-fermion contact interactions. We find that muon specific Wilson coefficients $$$$C_9 \simeq -0.73$$$$ $C_9\simeq -0.73$ or $$$$C_9 = -C_{10} \simeq -0.39$$$$ $C_9=-C_{10}\simeq -0.39$ continue to give an excellent description of the data. If only theoretically clean observables are considered, muon specific $$$$C_{10} \simeq 0.60$$$$ $C_{10}\simeq 0.60$ or $$$$C_9=-C_{10} \simeq -0.35$$$$ $C_9=-C_{10}\simeq -0.35$ improve over the Standard Model by $$$$\sqrt{\Delta \chi ^2} \simeq 4.7\sigma $$$$ $\sqrt{\Delta {\chi }^2}\simeq 4.7\sigma$ and $$$$\sqrt{\Delta \chi ^2} \simeq 4.6\sigma $$$$ $\sqrt{\Delta {\chi }^2}\simeq 4.6\sigma$ , respectively. In various new physics scenarios we provide predictions for lepton flavor universality observables and CP asymmetries that can be tested with more data. We update our previous combination of ATLAS, CMS, and LHCb data on BR $$$$(B_s \rightarrow \mu ^+\mu ^-)$$$$ $(B_s\to {\mu }^{+}{\mu }^{-})$ and BR $$$$(B^0\rightarrow \mu ^+\mu ^-)$$$$ $(B^0\to {\mu }^{+}{\mu }^{-})$ taking into account the full two-dimensional non-Gaussian experimental likelihoods.

Authors:

Altmannshofer, Wolfgang; Stangl, Peter

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Publication Date:

Thu Oct 28 00:00:00 EDT 2021

Research Org.:

Univ. of California, Santa Cruz, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC); Swiss National Science Foundation (SNSF)

OSTI Identifier:

1828087

Alternate Identifier(s):

OSTI ID: 1904489

Grant/Contract Number:  

SC0010107; 200020175449/1

Resource Type:

Published Article

Journal Name:

European Physical Journal. C, Particles and Fields

Additional Journal Information:

Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 81 Journal Issue: 10; Journal ID: ISSN 1434-6044

Publisher:

Springer Science + Business Media

Country of Publication:

Germany

Language:

English

Subject:

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics