QED factorization of two-body non-leptonic and semi-leptonic B to charm decays

Beneke, Μ.; Böer, Philipp; Finauri, Gael; Vos, Kimberley

doi:10.1007/jhep10(2021)223

Cited by 31 publications

(33 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these effects are already well studied in the literature. NLO QED effects when the photon is soft have been computed in [26,27,42,43], including resumming the Coulomb corrections, while leading logs are partially resummed in PHOTOS [44,45] (up to quadratic order) or fully via YFS [46] in other MonteCarlo event generators such as Sherpa [47]. Several numerical comparisons between the different predictions of these calculations have been performed both in the B-factory [23] and LHCb [24] kinematic regimes.…”

Section: Discussionmentioning

confidence: 99%

Radiative semileptonic $$ \overline{B} $$ decays

Papucci

Trickle

Wise

2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We consider the form factors for the radiative semileptonic decays $$ \overline{B} $$ B ¯ (v) → D(*)(v′)ℓ$$ \overline{\nu} $$ ν ¯ ℓγ in the kinematic region where the photon momentum, k, is small enough that heavy quark symmetry (HQS) can be applied without the radiated photon changing the heavy quark velocity (i.e., v(′) ∙ k < m(b,c)). We find that HQS is remarkably powerful, leaving only four new undetermined form factors at leading order in 1/m(b,c). In addition, one of them is fixed in terms of the leading order Isgur-Wise function in the kinematic region, v(′) ∙ k < ΛQCD.

show abstract

Section: Discussionmentioning

confidence: 99%

Radiative semileptonic $$ \overline{B} $$ decays

Papucci

Trickle

Wise

2022

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…Besides, the QCD×QED factorization is studied recently in ref. [62], where QED contributions to the color-allowed tree amplitudes are found to reduce the total amplitudes by the sub-percent level, though ultrasoft photons may correct the measured decay rates up to a few percent.…”

Section: Jhep01(2022)147mentioning

confidence: 93%

Revisiting rescattering contributions to $$ \overline{B} $$(s) → $$ {D}_{(s)}^{\left(\ast \right)}M $$ decays

Endo

Iguro

Mishima

2022

J. High Energ. Phys.

View full text Add to dashboard Cite

Motivated by the reported discrepancies between experimental data and Standard Model predictions for the branching ratios of the color-allowed decays $$ \overline{B} $$ B ¯ 0 → D(*)+K− and $$ {\overline{B}}_s^0 $$ B ¯ s 0 → $$ {D}_s^{\left(\ast \right)+}{\pi}^{-} $$ D s ∗ + π − , we study final-state rescattering effects on $$ \overline{B} $$ B ¯ (s) → $$ {D}_{(s)}^{\left(\ast \right)}P $$ D s ∗ P and $$ \overline{B} $$ B ¯ (s) → D(s)V, where P(V) is a light pseudoscalar (vector) meson. We consider quasi-elastic rescatterings in the framework of SU(3) and U(3) flavor symmetries, and find that the effects cannot explain the measured branching ratios of the color-allowed and color-suppressed decays simultaneously. We also perform global fits to the $$ \overline{B} $$ B ¯ (s) → $$ {D}_{(s)}^{\left(\ast \right)}P $$ D s ∗ P and $$ \overline{B} $$ B ¯ (s) → D(s)V data, allowing for new physics contributions to the Wilson coefficient a1 associated with the color-allowed tree amplitudes. It is shown that the fits prefer a downward shift of $$ \mathcal{O} $$ O (10%) in a1 even in the presence of the quasi-elastic rescattering contributions.

show abstract

“…[11] for an early work) or on factorization, like PQCD [12,13] or QCD factorization (QCDF) [14][15][16]. The latter provides a rigorous and systematic framework to disentangle shortfrom long-distance physics in the heavy quark limit, and at leading power in QCD /m b has arrived at a highly sophisticated level [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. One of the shortcomings of the QCDF approach in its present use is the failure to compute subleading power corrections in the heavy-quark expansion from first field-theoretical principles (see [33] for a determination of annihilation topologies for B → ππ using QCD-sum rules).…”

Section: Introductionmentioning

confidence: 99%

Estimating QCD-factorization amplitudes through SU(3) symmetry in $$B\rightarrow P P$$ decays

Huber

Tetlalmatzi-Xolocotzi

2022

Eur. Phys. J. C

View full text Add to dashboard Cite

We estimate the potential size of the weak annihilation amplitudes in QCD factorization as allowed by experimental data. To achieve this goal, we establish a connection between the amplitudes in the QCD factorization and the so-called topological and SU(3)-invariant descriptions. Our approach is based purely on the analysis of the tensor structure of the decay amplitudes. By focusing on the processes $$B\rightarrow P P$$ B → P P and considering data from CP asymmetries and branching fractions, we perform a global fit to the SU(3)-irreducible quantities assuming minimal theoretical bias. Subsequently we translate the outcome to the QCD factorization decomposition, and find that the most constrained weak annihilation amplitudes are below 0.04. However, in view of the large uncertainties in several of the experimental input parameters, values up to $$\sim 0.3$$ ∼ 0.3 are allowed in certain cases.

show abstract

QED factorization of two-body non-leptonic and semi-leptonic B to charm decays

Abstract: The QCD×QED factorization is studied for two-body non-leptonic and semi-leptonic B decays with heavy-light final states. These non-leptonic decays, like $$ {\overline{B}}_{(s)}^0\to {D}_{(s)}^{+}{\pi}^{-} $$ B ¯ s 0 → D … Show more

Cited by 31 publications

References 26 publications

Radiative semileptonic $$ \overline{B} $$ decays

Radiative semileptonic $$ \overline{B} $$ decays

Revisiting rescattering contributions to $$ \overline{B} $$(s) → $$ {D}_{(s)}^{\left(\ast \right)}M $$ decays

Estimating QCD-factorization amplitudes through SU(3) symmetry in $$B\rightarrow P P$$ decays

Contact Info

Product

Resources

About