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Publications (20)

hep-ph2022

Disentangling Lepton Flavour Universal and Lepton Flavour Universality Violating Effects in $b \to s ℓ^{+} ℓ^{-}$ Transitions

Marcel AlguerÃ³, Bernat Capdevila, Andreas Crivellin +1

In this letter we propose a strategy for discerning if new physics in the Wilson coefficient $C_{9 I^¼}$ is dominantly lepton flavour universality violating or if it contains…

hep-ph2019

What $R_{K}$ and $Q_{5}$ can tell us about New Physics in $b \to s ℓℓ$ transitions?

Marcel AlguerÃ³, Bernat Capdevila, SÃ©bastien Descotes-Genon +2

The deviations with respect to the Standard Model that are currently observed in $b \to s ℓℓ$ transitions, or $B$ anomalies, can be interpreted in terms of different New Phys…

hep-ph2022

$b \to s ℓℓ$ Global Fits after $R_{K_{S}}$ and $R_{K^{*+}}$

Marcel AlguerÃ³, Bernat Capdevila, SÃ©bastien Descotes-Genon +2

We present an up-to-date complete model-independent global fit to $b \to s ℓ^{+} ℓ^{-}$ observables that confirms patterns of New Physics able to explain the data. We include the re…

hep-ph2018

Patterns of New Physics in $b \to s ℓ^{+} ℓ^{-}$ transitions in the light of recent data

Bernat Capdevila, Andreas Crivellin, SÃ©bastien Descotes-Genon +2

In the Standard Model (SM), the rare transitions where a bottom quark decays into a strange quark and a pair of light leptons exhibit a potential sensitivity to physics beyond the…

hep-ph2018

Hadronic uncertainties in $B \to K^{*} I^¼^{+} I^¼^{-}$ : a state-of-the-art analysis

Bernat Capdevila, Sebastien Descotes-Genon, Lars Hofer +1

In the absence of direct evidence for New Physics at present LHC energies, the focus is set on the anomalies and discrepancies recently observed in rare $b \to s ℓℓ$ transitio…

hep-ph2016

Assessing lepton-flavour non-universality from $B \to K^{*} ℓℓ$ angular analyses

Bernat Capdevila, Sebastien Descotes-Genon, Joaquim Matias +1

The $B \to K^{*} I^¼ I^¼$ decay exhibits deviations with respect to Standard Model expectations and the measurement of the ratio $R_{K}$ hints at a violation of lepton-flavour universality…

hep-ph2021

Unveiling Hidden Physics at the LHC

Oliver Fischer, Bruce Mellado, Stefan Antusch +30

The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyo…

hep-ph2024

To (b)e or not to (b)e: No electrons at LHCb

Marcel AlguerÃ³, Aritra Biswas, Bernat Capdevila +3

We discuss the impact of the recent LHCb update on the two lepton-flavour universality ratios $R_{K}$ and $R_{K^{*}}$ , and the CMS update of $B (B_{s} \to I^¼^{+} I^¼^{-})$ regarding the possi…

hep-ph2022

Perturbative corrections to power suppressed effects in $B ˉ \to X_{u} ℓ I^½$

Bernat Capdevila, Paolo Gambino, Soumitra Nandi

We compute the $O (I^\pm_{s})$ corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic $B$ decays in the limit of a massless final quark. Our cal…

hep-ph2020

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

Marcel AlguerÃ³, Bernat Capdevila, Andreas Crivellin +5

We perform a model-independent global fit to $b \to s ℓ^{+} ℓ^{-}$ observables to confirm existing New Physics (NP) patterns (or scenarios) and to identify new ones emerging from th…

hep-ph2017

Searching for New Physics with $b \to s I ¨ ^{+} I ¨ ^{-}$ processes

Bernat Capdevila, Andreas Crivellin, SÃ©bastien Descotes-Genon +2

In recent years, intriguing hints for the violation of Lepton Flavour Universality (LFU) have been accumulated in semileptonic $B$ decays, both in the neutral-current transitions $…

hep-ph2019

Fitting in or odd one out? Pulls vs residual responses in $b \to s ℓ^{+} ℓ^{-}$

Bernat Capdevila, Ursula Laa, German Valencia

New results in processes with an underlying quark transition $b \to s ℓ^{+} ℓ^{-}$ have been recently reported by the LHCb and Belle II collaborations. In this note we show how the…

hep-ph2021

Three loop calculations and inclusive $V_{c b}$

Marzia Bordone, Bernat Capdevila, Paolo Gambino

We discuss the impact of the recent $O (I^\pm_{s}^{3})$ calculations of the semileptonic width of the $b$ quark and of the relation between pole and kinetic heavy quark masses by…

hep-ph2021

Explaining $b \to s ℓ^{+} ℓ^{-}$ and the Cabibbo Angle Anomaly with a Vector Triplet

Bernat Capdevila, Andreas Crivellin, Claudio Andrea Manzari +1

The most statistically significant hints for new physics in the flavor sector are discrepancies between theory and experiment in $B$ decays to lepton pairs ( $b \to s ℓ^{+} ℓ^{-}$ ) a…

hep-ph2016

$B \to K^{*} (\to K I ¨ ) ℓ^{+} ℓ^{-}$ theory and the global picture: What's next?

Bernat Capdevila, Sebastien Descotes-Genon, Lars Hofer +2

The present status of the LHC anomalies found in exclusive semileptonic $b \to s ℓ^{+} ℓ^{-}$ decays is discussed with special emphasis on the exclusive 4-body angular distribution…

hep-ph2025

Model-independent unbinned analysis of $B \to K^{*} (\to K^{+} I ¨ ^{-}) I^¼^{+} I^¼^{-}$ : zeroes, bounds, Wilson coefficients and symmetries

Bernat Capdevila, Joaquim Matias, MartÃn Novoa-Brunet +2

We present a model-independent method to study the four-body decay $B \to K^{*} (\to K^{+} I ¨ ^{-}) I^¼^{+} I^¼^{-}$ , based on extracting continuous observables with a moments approach. The method a…

hep-ph2024

$S U (2)_{L}$ deconstruction and flavour (non)-universality

Bernat Capdevila, Andreas Crivellin, Javier M. Lizana +1

We study two-site deconstructions of the $S U (2)_{L}$ gauge group factor of the SM. Models based on this approach can explain the hierarchies of the quark masses and CKM mixing betwee…

hep-ph2023

Review of Semileptonic $B$ Anomalies

Bernat Capdevila, Andreas Crivellin, Joaquim Matias

We review the current status and implications of the anomalies (i.e. deviations from the Standard Model predictions) in semi-leptonic $B$ meson decays, both in the charged and in t…

hep-ph2019

Anatomy of a six-parameter fit to the $b \to s ℓ^{+} ℓ^{-}$ anomalies

Bernat Capdevila, Ursula Laa, German Valencia

Discrepancies between measurements of decay modes with an underlying quark level transition $b \to s ℓ^{+} ℓ^{-}$ and standard model (SM) predictions have persisted for several yea…

hep-ph2019

Are we overlooking Lepton Flavour Universal New Physics in $b \to s ℓℓ$ ?

The deviations with respect to the Standard Model (SM) that are currently observed in $b \to s ℓℓ$ transitions (the so-called flavour anomalies) can be interpreted in terms o…

Publications (20)

Disentangling Lepton Flavour Universal and Lepton Flavour Universality Violating Effects in b→sℓ+ℓ− Transitions

What RK​ and Q5​ can tell us about New Physics in b→sℓℓ transitions?

b→sℓℓ Global Fits after RKS​​ and RK∗+​

Patterns of New Physics in b→sℓ+ℓ− transitions in the light of recent data

Hadronic uncertainties in B→K∗I^¼+I^¼−: a state-of-the-art analysis

Assessing lepton-flavour non-universality from B→K∗ℓℓ angular analyses

Unveiling Hidden Physics at the LHC

To (b)e or not to (b)e: No electrons at LHCb

Perturbative corrections to power suppressed effects in Bˉ→Xu​ℓI^½

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

Searching for New Physics with b→sI¨+I¨− processes

Fitting in or odd one out? Pulls vs residual responses in b→sℓ+ℓ−

Three loop calculations and inclusive Vcb​

Explaining b→sℓ+ℓ− and the Cabibbo Angle Anomaly with a Vector Triplet

B→K∗(→KI¨)ℓ+ℓ− theory and the global picture: What's next?

Model-independent unbinned analysis of B→K∗(→K+I¨−)I^¼+I^¼−: zeroes, bounds, Wilson coefficients and symmetries

SU(2)L​ deconstruction and flavour (non)-universality

Review of Semileptonic B Anomalies

Anatomy of a six-parameter fit to the b→sℓ+ℓ− anomalies

Are we overlooking Lepton Flavour Universal New Physics in b→sℓℓ ?

Disentangling Lepton Flavour Universal and Lepton Flavour Universality Violating Effects in $b \to s ℓ^{+} ℓ^{-}$ Transitions

What $R_{K}$ and $Q_{5}$ can tell us about New Physics in $b \to s ℓℓ$ transitions?

$b \to s ℓℓ$ Global Fits after $R_{K_{S}}$ and $R_{K^{*+}}$

Patterns of New Physics in $b \to s ℓ^{+} ℓ^{-}$ transitions in the light of recent data

Hadronic uncertainties in $B \to K^{*} I^¼^{+} I^¼^{-}$ : a state-of-the-art analysis

Assessing lepton-flavour non-universality from $B \to K^{*} ℓℓ$ angular analyses

Perturbative corrections to power suppressed effects in $B ˉ \to X_{u} ℓ I^½$

Searching for New Physics with $b \to s I ¨ ^{+} I ¨ ^{-}$ processes

Fitting in or odd one out? Pulls vs residual responses in $b \to s ℓ^{+} ℓ^{-}$

Three loop calculations and inclusive $V_{c b}$

Explaining $b \to s ℓ^{+} ℓ^{-}$ and the Cabibbo Angle Anomaly with a Vector Triplet

$B \to K^{*} (\to K I ¨ ) ℓ^{+} ℓ^{-}$ theory and the global picture: What's next?

Model-independent unbinned analysis of $B \to K^{*} (\to K^{+} I ¨ ^{-}) I^¼^{+} I^¼^{-}$ : zeroes, bounds, Wilson coefficients and symmetries

$S U (2)_{L}$ deconstruction and flavour (non)-universality

Review of Semileptonic $B$ Anomalies

Anatomy of a six-parameter fit to the $b \to s ℓ^{+} ℓ^{-}$ anomalies

Are we overlooking Lepton Flavour Universal New Physics in $b \to s ℓℓ$ ?