Addendum to: Emerging patterns of New Physics with and without Lepton Flavour Universal contributions

Abstract

This paper is an addendum to Ref. Eur. Phys. J. C79 (2019) no. 8, 714 that supersedes all results (Tables and Figures) in that paper after including the new data on the $$B\rightarrow K^*\mu \mu $$B→K∗μμ angular distribution released in 2020 by the LHCb collaboration. The new results confirm all the conclusions in Eur. Phys. J. C79 (2019) no. 8, 714, exhibiting an increase in the coherence and significance of the hypotheses and confirming the existence of a puzzle.

Anomalies in B -meson decays and the muon g−2 from dark loops

“…10 . This indicates that the relevant operator in our model reduces to a single left-handed one of the form ðα=4πÞ½sγ ν P L b½μγ ν ð1 − γ 5 Þμ, which has been widely investigated in the literature [30,[81][82][83][84][85][86][87][88][89][90][91][92][93][94][95] because evidence for RðK ðÃÞ Þ anomalies was observed in 2014. More recently, this scenario has been revisited in Ref.…”

Enhanced CP asymmetries in $$B \rightarrow K \mu ^+ \mu ^-$$

“…. , [7,8] GeV 2 bins depends on the resonant spectrum too and therefore the results of Ref. [16] should be accounted for carefully.…”

“…To understand the origin of such a discrepancy between theory and experiment one readily extends the effective field theory beyond the SM and from a fit to the experimental data extracted from the full angular distribution of B → K ( * ) μμ [5], one can deduce which scenario of New Physics is preferred [6][7][8]. On the basis of such analyses and the available experimental data it is reasonable to assume that a e-mail: damir.becirevic@ijclab.in2p3.fr b e-mail: svjetlana.fajfer@ijs.si c e-mail: nejc.kosnik@ijs.si d e-mail: aleks.smolkovic@ijs.si (corresponding author) the LFUV in R exp K ( * ) < R SM K ( * ) is due to a more pronounced coupling of New Physics to the muon pair in the final state.…”

Electroweak Penguin Decays

“…Electroweak penguin decays Jacco Andreas de Vries 1 The angular coefficients I i (q 2 ) are functions of the K * 0 polarisation amplitudes, which in turn depend on the Wilson coefficients and form factors for this decay. The branching ratio can be expressed in various bases, where the so-called P i basis is optimized to minimize the theory uncertainties.…”

“…In the search for physics beyond the Standard Model (SM), recent excitement has occured around a group of indirect measurements involving the transition of a b-quark to an s-quark and two leptons, called the 'flavour anomalies' (Fig. 1 (right)) [1]. These transitions are flavour-changing and neutral, and hence can only occur at loop-level Feynman diagrams in the SM, making them suppressed to about one part in 10 −7 or smaller, and sensitive to new physics contributions in these loops.…”