The (Q7, Q1,2) contribution to 



B
¯

→

X
s

γ

$$ \overline{B}\to {X}_s\gamma $$
 at 


O


α
s
2



$$ \mathcal{O}\left({\alpha}_{\mathrm{s}}^2\right) $$

Czakon, M.; Fiedler, Paul C.; Huber, Tobias; Misiak, Mikołaj; Schutzmeier, Thomas; Steinhauser, Matthias

doi:10.1007/jhep04(2015)168

Cited by 83 publications

(81 citation statements)

References 69 publications

(137 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(D.4) of Ref. [8] where a normalization to the semileptonic rate was used, and some of the nonperturbative effects were relegated to the semileptonic phase-space factor C in Eqs. [6].…”

Section: Photon Energy Cutoff In B Sγ and B Dγmentioning

confidence: 99%

“…[7,8] (perturbative & fixed-order HQET), in which case the photon energy spectrum is determined mainly by the perturbative gluon bremsstrahlung. In these cases, no uncertainties are quoted, as we do not know at which E 0 the fixed-order HQET description breaks down.…”

Section: Photon Energy Cutoff In B Sγ and B Dγmentioning

confidence: 99%

“…[37,41,42] for arbitrary values of the charm quark mass m c . The remaining parts were found only in the limits m c m b /2 [43] or m c = 0 [8], and then an interpolation between these two limits was performed [8].…”

Section: The Ratio R γ In the Sm And 2hdmmentioning

confidence: 99%

“…The most precise results come from the Belle collaboration, especially from their recent analysis based on the full (772 ± 11) × 10 6 BB pair dataset [6]. Their updated result is now below the Standard Model prediction [7,8], though it remains consistent with it. On the other hand, the 2HDM effects in Model II can only enhance the decay rate.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

2017

Self Cite

View full text Add to dashboard Cite

In a recent publication (Abdesselam et al. arXiv:1608.02344), the Belle collaboration updated their analysis of the inclusive weak radiative B-meson decay, including the full dataset of (772 ± 11) × 10 6 BB pairs. Their result for the branching ratio is now below the Standard Model prediction (Misiak et al. Phys Rev Lett 114:221801, 2015, Czakon et al. JHEP 1504:168, 2015, though it remains consistent with it. However, bounds on the charged Higgs boson mass in the Two-Higgs-Doublet Model get affected in a significant manner. In the so-called Model II, the 95% C.L. lower bound on M H ± is now in the 570-800 GeV range, depending quite sensitively on the method applied for its determination. Our present note is devoted to presenting and discussing the updated bounds, as well as to clarifying several ambiguities that one might encounter in evaluating them. One of such ambiguities stems from the photon energy cutoff choice, which deserves re-consideration in view of the improved experimental accuracy.

show abstract

“…(D.4) of Ref. [8] where a normalization to the semileptonic rate was used, and some of the nonperturbative effects were relegated to the semileptonic phase-space factor C in Eqs. [6].…”

Section: Photon Energy Cutoff In B Sγ and B Dγmentioning

confidence: 99%

Section: Photon Energy Cutoff In B Sγ and B Dγmentioning

confidence: 99%

Section: The Ratio R γ In the Sm And 2hdmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The result is usually quoted for a threshold photon energy to avoid experimental background from other Bremsstrahlung processes. For the decay with E γ > 1.6 GeV in the rest frame of the B meson, the result at NNLO accuracy is 24,25 …”

mentioning

confidence: 96%

Rare B-Meson Decays at the Crossroads

Ali

2016

New Physics at the Large Hadron Collider

View full text Add to dashboard Cite

Likelihood analysis of the flavour anomalies and g – 2 in the general two Higgs doublet model

Athron

Balázs

Gonzalo

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We present a likelihood analysis of the general two Higgs doublet model, using the most important currently measured flavour observables, in view of the anomalies in charged current tree-level and neutral current one-loop rare decays of B mesons in b → cl$$ \overline{\nu} $$ ν ¯ and b → sμ+μ− transitions, respectively. We corroborate that the model explains the latter and it is able to simultaneously fit the experimental values of the R(D) charged current ratio at 1σ, but it can not accommodate the D* charmed meson observables R(D*) and FL(D*). We find that the fitted values for the angular observables in b → sμ+μ− transitions exhibit better agreement with the general two Higgs double model in comparison to the SM. We also make predictions for future collider observables BR(t → ch), BR(h → bs), BR(h → τμ), BR(Bs → τ+τ−), BR(B+ → K+τ+τ−) and the flavour violating decays of the τ lepton, BR(τ → 3μ) and BR(τ → μγ). The model predicts values of BR(t → ch), BR(Bs → τ+τ−) and BR(B+ → K+τ+τ−) that are out of reach of future experiments, but its predictions for BR(h → bs) and BR(h → τμ) are within the future sensitivity of the HL-LHC or the ILC. We also find that the predictions for the τ → 3μ and τ → μγ decays are well within the projected limits of the Belle II experiment. Finally, using the latest measurement of the Fermilab Muon g − 2 Collaboration, we performed a simultaneous fit to ∆aμ constrained by the charged anomalies, finding solutions at the 1σ level. Once the neutral anomalies are included, however, a simultaneous explanation is unfeasible.

show abstract

The (Q7, Q1,2) contribution to B ¯ → X s γ $$ \overline{B}\to {X}_s\gamma $$ at O α s 2 $$ \mathcal{O}\left({\alpha}_{\mathrm{s}}^2\right) $$

Cited by 83 publications

References 69 publications

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

Rare B-Meson Decays at the Crossroads

Likelihood analysis of the flavour anomalies and g – 2 in the general two Higgs doublet model

Contact Info

Product

Resources

About