scholarly journals Exclusive Charmless Semileptonic Decays $B\rightarrow Xu\ell \nu$ from BaBar

2007 ◽  
Author(s):  
Jochen Christian Dingfelder
Keyword(s):  
Semileptonic Decays ◽  
Charmless Semileptonic Decays

scholarly journals Measurement of charmless semileptonic decays ofBmesons

1993 ◽  
Vol 71 (25) ◽  
pp. 4111-4115 ◽  
Author(s):  
J. Bartelt ◽  
S. E. Csorna ◽  
Z. Egyed ◽  
V. Jain ◽  
D. S. Akerib ◽  
...  
Keyword(s):  
Semileptonic Decays ◽  
Charmless Semileptonic Decays

scholarly journals QED corrections in $$ \overline{B}\to \overline{K}{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-} $$ at the double-differential level

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Gino Isidori ◽  
Saad Nabeebaccus ◽  
Roman Zwicky
Keyword(s):  
Phase Space ◽  
Detailed Analysis ◽  
Invariant Mass ◽  
Mass Distribution ◽  
Invariant Mass Distribution ◽  
Semileptonic Decays ◽  
Lepton Pair ◽  
Specific Choice ◽  
Slicing Method

Abstract We present a detailed analysis of QED corrections to $$ \overline{B}\to \overline{K}{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-} $$ B ¯ → K ¯ ℓ + ℓ − decays at the double-differential level. Cancellations of soft and collinear divergences are demonstrated analytically using the phase space slicing method. Whereas soft divergences are found to cancel at the differential level, the cancellation of the hard-collinear logs ln mℓ require, besides photon-inclusiveness, a specific choice of kinematic variables. In particular, hard-collinear logs in the lepton-pair invariant mass distribution (q2), are sizeable and need to be treated with care when comparing with experiment. Virtual and real amplitudes are evaluated using an effective mesonic Lagrangian. Crucially, we show that going beyond this approximation does not introduce any further infrared sensitive terms. All analytic computations are performed for generic charges and are therefore adaptable to semileptonic decays such as $$ \overline{B}\to D\mathrm{\ell}\overline{\nu } $$ B ¯ → D ℓ ν ¯ .

scholarly journals Lattice QCD calculation of the electroweak box diagrams for the kaon semileptonic decays

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
Peng-Xiang Ma ◽  
Xu Feng ◽  
Mikhail Gorchtein ◽  
Lu-Chang Jin ◽  
Chien-Yeah Seng
Keyword(s):  
Lattice Qcd ◽  
Semileptonic Decays
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