Skewed parton distributions for 
                $B\to \pi$
               transitions

Feldmann, Th.; Kroll, P.

doi:10.1007/s100529900241

Cited by 26 publications

(19 citation statements)

References 22 publications

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“…ν)/dq 2 for a variety form factor calculation techniques [10,11,20,21] illustrate the range of variation of the predicted q 2 -dependence.…”

Section: Fig 1: Predictions For Dγ(b →mentioning

confidence: 99%

“…For each of those, we assign a systematic contribution for the rate in each measured phase space region to be 1/2 the difference of the largest and smallest rates obtained in that region for the different form factors. The systematic errors due to uncertainties in the signal decay form factors are summarized in Table VIII. For B → π ν, we consider form factors from the unquenched lattice QCD calculations by HPQCD [10] (our nominal form factor), from Ball and Zwicky [11], Scora and Isgur (ISGW2) [21], and Feldmann and Kroll [20]. The variation in q 2 dependence of the rate from these calculations is illustrated in Figure 1.…”

Section: Dependence On Form Factorsmentioning

confidence: 99%

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Study of exclusive charmless semileptonicBdecays and extraction of|Vub|at CLEO

Asner¹,

Edwards²,

Briere³

et al. 2007

Phys. Rev. D

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We have studied semileptonic B decay to the exclusive charmless states π, ρ/ω, η and η using the full 15.5 fb −1 CLEO Υ(4S) sample, with measurements performed in subregions of phase space to minimize dependence on a priori knowledge of the form factors involved. We find total branching fractions B(B 0 → π − + ν) = (1.37 ± 0.15 stat ± 0.11 sys ) × 10 −4 and B(B 0 → ρ − + ν) = (2.93 ± 0.37 stat ± 0.37 sys ) × 10 −4 . We find evidence for B + → η + ν, with B(B + → η + ν) = (2.66 ± ±0.80 stat ± 0.56 sys ) × 10 −4 and 1.20 × 10 −4 < B(B + → η + ν) < 4.46 × 10 −4 (90% CL). We also limit B(B + → η + ν) < 1.01 × 10 −4 (90% CL). By combining our B → π ν information with unquenched lattice calculations, we find |V ub | = (3.6 ± 0.4 stat ± 0.2 sys +0.6 −0.4thy ) × 10 −3 .2

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“…ν)/dq 2 for a variety form factor calculation techniques [10,11,20,21] illustrate the range of variation of the predicted q 2 -dependence.…”

Section: Fig 1: Predictions For Dγ(b →mentioning

confidence: 99%

Section: Dependence On Form Factorsmentioning

confidence: 99%

Study of exclusive charmless semileptonicBdecays and extraction of|Vub|at CLEO

Asner¹,

Edwards²,

Briere³

et al. 2007

Phys. Rev. D

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show abstract

“…For the pion and the proton we take the parameterizations of the light-cone wave functions proposed in Refs. [9] and [10] …”

Section: Double-handbag Amplitude Gpds and Transition Form Factorsmentioning

confidence: 99%

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

Kofler

Schweiger

2017

Few-Body Syst

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We employ the generalized parton picture to analyze the reaction π − p → D − Λ + c . Thereby it is assumed that the process amplitude factorizes into one for the perturbatively calculable subprocessū u →c c and hadronic matrix elements that can be parameterized in terms of generalized parton distributions for the π − → D − and p → Λ + c transitions, respectively. Representing these parton distributions in terms of valencequark light-cone wave functions for π, D, p and Λ c allows us to make numerical predictions for unpolarized differential and integrated cross sections as well as spin observables. In the kinematical region where this approach is supposed to work, i.e. s 20 GeV 2 and in the forward hemisphere, the resulting cross sections are of the order of nb. This is a finding that could be of interest in view of plans to measure π − p → D − Λ + c , e.g., at J-PARC or COMPASS.

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“…u decays, they were considered previously in Ref. [29], and S 1 is directly related to the functionF 1 x; q 2 introduced in that paper. The soft functions S 1;2 satisfy several modelindependent constraints.…”

Section: Factorization Proofmentioning

confidence: 99%

Factorization in exclusive semileptonic radiativeBdecays

Cirigliano

Pirjol

2005

Phys. Rev. D

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We derive a new factorization relation for the semileptonic radiative decay B ! ' in the kinematical region of a slow pion jp j and an energetic photon E , working at leading order in =m b . In the limit of a soft pion, the nonperturbative matrix element appearing in this relation can be computed using chiral perturbation theory. We present a phenomenological study of this decay, which may be important for a precise determination of the exclusive nonradiative decay.

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Skewed parton distributions for $B\to \pi$ transitions

Cited by 26 publications

References 22 publications

Study of exclusive charmless semileptonicBdecays and extraction of|Vub|at CLEO

Study of exclusive charmless semileptonicBdecays and extraction of|Vub|at CLEO

A Perturbative QCD Approach to $$\varvec{\pi ^{-}~p \rightarrow D^{-}~{\varLambda }_{c}^{+}}$$ π - p → D - Λ c +

Factorization in exclusive semileptonic radiativeBdecays

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