Status of rare exclusive $B$ meson decays in 2018

Danny van Dyk; Johannes Albrecht; Stefanie Reichert

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Status of rare exclusive $B$ meson decays in 2018

Johannes Albrecht, Stefanie Reichert, Danny van Dyk

High Energy Physics - Experiment · Submitted 13 Jun 2018

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim This review discusses the present experimental and theoretical status of rare flavour-changing neutral current $b$-quark decays at the begin of 2018.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 2,936 input tokens.

What the abstract itself states, as probabilities: claims first 0.02 · states limitation 0.13 · human participants 0.02 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.14 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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This review discusses the present experimental and theoretical status of rare flavour-changing neutral current $b$-quark decays at the begin of 2018. It includes a discussion of the experimental situation and details of the currently observed anomalies in measurements of flavour observables, including lepton flavour universality. Progress on the theory side, within and beyond the Standard Model theory is also discussed, together with potential New Physics interpretations of the present measurements.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	This review discusses the present experimental and theoretical status of rare flavour-changing neutral current $b$-quark decays at the begin of 2018.	contribution 0.82	0.10	0.06	asserted 0.83
s1	It includes a discussion of the experimental situation and details of the currently observed anomalies in measurements of flavour observables, including lepton flavour universality.	contribution 0.95	0.08	0.06	asserted 0.90
s2	Progress on the theory side, within and beyond the Standard Model theory is also discussed, together with potential New Physics interpretations of the present measurements.	contribution 0.86	0.08	0.08	asserted 0.66

What kind of paper the classifier reports this is: review 1.00 · evidence from literature 0.98.

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

This review discusses the present experimental and theoretical status of rare flavour-changing neutral current $b$-quark decays at the begin of 2018. It includes a discussion of the experimental situation and details of the currently observed anomalies in measurements of flavour observables, including lepton flavour universality. Progress on the theory side, within and beyond the Standard Model theory is also discussed, together with potential New Physics interpretations of the present measurements.

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References

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Muon and electron $g-2$ and lepton masses in flavor models
hep-ph 2020-03 conditional novelty 6.0 of 10

A flavor-symmetry mechanism ties the muon and electron g-2 anomalies to the radiative generation of lepton masses, explaining both discrepancies with vector-like mediators in the 0.6-2.5 TeV range.
$B\to P$ and $B\to V$ Form Factors from $B$-Meson Light-Cone Sum Rules beyond Leading Twist
hep-ph 2018-11 conditional novelty 6.0 of 10

Complete twist-four two-particle and three-particle corrections to all B to P and B to V form factors are computed, and the higher-twist two-particle terms turn out to dominate the three-particle ones.
Unveiling Hidden Physics at the LHC
hep-ph 2021-09 conditional novelty 3.0 of 10

The paper argues that beyond-Standard-Model physics may be hidden in existing LHC data behind soft, hadronic, associated-production, or long-lived signatures, and that open CERN data is the fastest way to test those corners.

How the literature uses it

9 arXiv papers cite this in 10 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 7 sentences without a confident label

Cites it as background 3 papers

Reviews of such `$B$-physics anomalies' can be found in [ref] .

Simple model for large CP violation in charm decays, B-physics anomalies, muon g-2, and Dark Matter · Introduction · 0.96
Signs of departure from the universality of leptonic couplings predicted by the SM in semi-leptonic decays of $B$ mesons have been reported by LHCb and B-factories experiments both in neutral- and charged-current processes — for recent reviews see [ref] .

Muon and electron $g-2$ and lepton masses in flavor models · Introduction · 0.86
In light of the recent $b$ anomalies[ See references [ref] and [ref] for recent reviews on the topic. ], the form factors for $B→K^(*)$ and $B→D̅^(*)$ transitions in particular have moved into the focus of theoretical and phenomenological interest.

$B\to P$ and $B\to V$ Form Factors from $B$-Meson Light-Cone Sum Rules beyond Leading Twist · Introduction · 0.96

What it cites · 169 sentences without a confident label

Uses the method or tool of 6 papers

A fit to the complete set of -averaged observables, namely $F_L$, $A_FB$ and $S_3-S_9$, as determined from the maximum likelihood fit is performed by the collaboration [ref] using the EOS software package [ref] for observables in the ranges below $8$ and $15.0 < < 19.0$.

The Benefits of B ---> K* l+ l- Decays at Low Recoil · $B →$ decays · 0.91
A fit to the complete set of -averaged observables, namely $F_L$, $A_FB$ and $S_3-S_9$, as determined from the maximum likelihood fit is performed by the collaboration [ref] using the EOS software package [ref] for observables in the ranges below $8$ and $15.0 < < 19.0$.

Angular analysis of the $B^{0}\rightarrow K^{*0}\mu^{+}\mu^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity · $B →$ decays · 0.91
A translation scheme between the two conventions is given in [ref] .

Generalised helicity formalism, higher moments and the $B \to K_{J_K}(\to K \pi) \bar{\ell}_1 \ell_2$ angular distributions · $B →$ decays · 0.84

Uses data or values from 25 papers

This analysis comprises a measurement of the differential branching fraction shown in phimumu_LHCb for which a discrepancy of $3.3σ$ between the measured branching fraction and the prediction in the region $1.0 < < 6.0$ is observed [ref] .

Angular analysis and differential branching fraction of the decay $B^0_s\to\phi\mu^+\mu^-$ · $→$ decays · 0.81
This result comprises, for the first time, evidence of isospin violation (defined similarly to AI) at a significance of $3.1σ$, $Δ_0+ = (+6.2 ±1.5 ±0.6 ±1.2 %$, where the uncertainties are statistical, systematic and the third uncertainty arises from the production ratio of charged to neutral pairs [ref] ; this result is consistent with the expectation.

Evidence for Isospin Violation and Measurement of $CP$ Asymmetries in $B \to K^{\ast}(892) \gamma$ · Exclusive decays · 0.93
In the dipion range of $0.5-1.3$, the first observation of the decay $$ with a branching fraction of $ℬ() = (8.6 ±1.5 ±0.7 ±0.7)·10^-8$ and the first evidence for the decay $$ with a branching fraction of $ℬ() = (2.11 ±0.51 ±0.15 ±0.16)·10^-8$ with the uncertainties being statistical, systematic and originating from the normalisation channel were reported [ref] .

Study of the rare $B_s^0$ and $B^0$ decays into the $\pi^+\pi^-\mu^+\mu^-$ final state · A note on decays · 0.99

Compares with 9 papers

This confirms a tension seen in the branching fraction measured by the previous analysis [ref] of about $3.1σ$ when comparing to more recent predictions [ref] than was referred to in the publication.

New physics in $b\to s$ transitions after LHC run 1 · $→$ decays · 0.81
This confirms a tension seen in the branching fraction measured by the previous analysis [ref] of about $3.1σ$ when comparing to more recent predictions [ref] than was referred to in the publication.

$B\to V\ell^+\ell^-$ in the Standard Model from Light-Cone Sum Rules · $→$ decays · 0.81
This confirms a tension seen in the branching fraction measured by the previous analysis [ref] of about $3.1σ$ when comparing to more recent predictions [ref] than was referred to in the publication.

Differential branching fraction and angular analysis of the decay $B_s^0\to\phi\mu^{+}\mu^{-}$ · $→$ decays · 0.81

Cites as background 8 papers

The effective Lagrangian reads (see [ref] ) [equation] where $ℒ_QED$ and $ℒ_QCD,5$ denote the Lagrangians of the electromagnetic and strong interactions (with five quark flavours after integrating out the top quark), refers to the Fermi constant, and the last term captures the local effective operators i with their effective couplings - or - i at the renormalisation scale $μ$.

Weak Decays Beyond Leading Logarithms · Anatomy of the amplitudes · 0.84
For the complete anatomy of the amplitudes of $B→K^(*)ℓ^+ℓ^-$ decays in the presence of operators of mass dimension six we refer to [ref] .

General Analysis of B -> K^(*) l^+ l^- Decays at Low Recoil · Anatomy of the amplitudes · 0.84
For the complete anatomy of the amplitudes of $B→K^(*)ℓ^+ℓ^-$ decays in the presence of operators of mass dimension six we refer to [ref] .

Generalised helicity formalism, higher moments and the $B \to K_{J_K}(\to K \pi) \bar{\ell}_1 \ell_2$ angular distributions · Anatomy of the amplitudes · 0.84

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