REVIEW 11 cited by
To (b)e or not to (b)e: No electrons at LHCb
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
abstract
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 $B({B_s \to \mu^+\mu^-})$ regarding the possibility of New Physics in $b\to s\ell^+\ell^-$ decays. We perform global fits of the New Physics Wilson coefficients defined in the model-independent approach of the Weak Effective Theory at the $b$-quark mass. We discuss three different frameworks for this analysis: i) an update limited to the experimental data using the same theoretical framework as in earlier works, ii) a full update concerning both the experimental inputs and the theoretical framework, iii) an analysis without the LHCb results on electron modes. The comparison between these sets of results allows us to identify the differences stemming from the various components of the analysis: new experimental results, new inputs for the hadronic form factors, the role played by LHCb data on electron modes. As expected, the significance of all New Physics hypotheses gets reduced after the LHCb announcements on $R_{K^{(\ast)}}$ while the hypothesis of a lepton-flavour-universal contribution to the Wilson coefficient of the semileptonic $O_{9\ell}$ operators (possibly with a very small lepton-flavour-universality violating component) is reinforced. We also discuss the possibility of a long-distance charm-loop contribution through a mode-by-mode analysis and we find that the preferred values for the $\mathcal{C}_{9\mu}$ Wilson coefficient are consistent throughout the different $b\to s\mu^+\mu^-$ modes and that there is no significant evidence of non-constant $q^2$ dependencies, which would indicate the presence of a long-distance charm-loop contribution beyond those already included.
Forward citations
Cited by 11 Pith papers
-
Unitarity bounds with subthreshold and anomalous cuts for $b$-hadron decays
A generalized, unitarity-bounded parametrization for b-hadron decay form factors that incorporates subthreshold and anomalous branch cuts is constructed.
-
A Dispersive Look at Rare $B$-meson Semileptonic Decays
Lattice-only Dispersive Matrix form factors enlarge large-recoil uncertainties and, with new angular data, favour long-distance hadronic effects over a short-distance C9 New Physics shift.
-
Standard Model tests with smeared experiment and theory
Finite-width Poisson smearing of both experiment and lattice theory permits model-independent Standard Model comparisons for inclusive semileptonic decays and for interference observables in rare semileptonic decays, ...
-
Lepton polarization dependent angular observables and the polarization asymmetries in the four-fold $\Lambda_b \rightarrow \Lambda(\rightarrow N \pi) \ell^+\ell^-$ decay
The authors derive the lepton-polarized four-fold angular distributions for Λ_b→Λ(→Nπ)ℓ⁺ℓ⁻, identify new angular coefficients for normal and transverse polarizations, and provide SM and NP predictions for the polariza...
-
Searching for Di-Higgs Signatures of Light Charged Scalars
A roughly 130 GeV charged Higgs explaining the ATLAS t to bH+ excess and B-meson anomalies can be constrained, and perhaps discovered, by recasting SM di-Higgs 4b searches at the LHC.
-
Targets for Flavor-Violating Top Decay
In leptoquark-like new physics, rare top decays to quarks and electron/muon pairs are predicted to occur at branching ratios of about 10^-8 to 10^-6, putting some within reach of LHC searches.
-
Electroweak baryogenesis from charged current anomalies in $B$ meson decays
Complex lepton Yukawa couplings in a two Higgs doublet model that explain the R(D(*)) flavor anomalies can also source electroweak baryogenesis, yielding the observed baryon asymmetry under assumed strong first-order ...
-
New Strategies for New Physics Search with $\Lambda_b \to \Lambda \nu \bar\nu$ Decays
For longitudinally polarized Lambda_b at future Z-pole machines, Lambda_b -> Lambda nu nubar has a forward-backward asymmetry that is independent of new physics at its zero crossing and complements the branching ratio...
-
Precision calculations of $B\to K^*$ form factors from SCET sum rules beyond leading-power contributions
New subleading-power corrections to B to K* form factors from SCET sum rules yield SM branching fractions BR(Bbar0 to Kbar*0 nu nubar)=8.09(96)e-6 and F_L=0.44(4).
-
Angular analysis of the B$^0$ $\to$ K$^*$(892)$^0\mu^+\mu^-$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS reports the first complete set of optimized angular observables in B0 to K*0 mu+ mu- from 13 TeV proton collisions, with tensions in P2 and P5' relative to some SM predictions.
-
Can Large Vision-Language Models Understand Multimodal Sarcasm?
Large vision-language models are reported to be weak at multimodal sarcasm, and a training-free knowledge-augmented framework is claimed to improve sarcasm detection and explanation.
Discussion (0). Continue with ORCID to comment.