Anomalous measurements: recent results deepen flavour puzzle

Abstract

The crown jewel of particle physics, the Standard Model (SM), has withstood numerous experimental trials. However, there are still some observations it cannot explain. Examples such as dark matter and the matter-antimatter imbalance in the Universe come to mind. The SM may be extended, by including additional particles and interactions, so as to explain such phenomena. These new particles and interactions are collectively referred to as "new physics" (NP), and the results covered by this article provide a promising lead for their discovery.

arXiv comment11 pages, 7 figures. Invited contribution to the newsletter of the CERN EP Department, June 2021

References in corpus (15)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Search for lepton-universality violation in $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of $CP$-averaged observables in the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and effective lifetime and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays
• Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B -> K(*) l+ l-
• Study of the rare decays of $B_s^0$ and $B^0$ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
• Power-enhanced leading-logarithmic QED corrections to $B_q\to {\mu }^{+}{\mu }^{-}$
• Reading the footprints of the B-meson flavor anomalies
• Test of lepton flavor universality and search for lepton flavor violation in $B\to K\ell \ell$ decays
• Measurement of properties of B${}_{\mathrm{s}}^0\to {\mu }^{+}{\mu }^{-}$ decays and search for B${}^0\to {\mu }^{+}{\mu }^{-}$ with the CMS experiment
• Precise measurement of the $f_s/f_d$ ratio of fragmentation fractions and of $B_s^0$ decay branching fractions
• flavio: a Python package for flavour and precision phenomenology in the Standard Model and beyond
• New Physics in Rare B Decays after Moriond 2021