Erratum: Predictions for semileptonic decays of charm baryons. II. Nonrelativistic and MIT bag quark models

1991 ◽  
Vol 44 (7) ◽  
pp. 2203-2203 ◽  
Author(s):  
R. Pérez-Marcial ◽  
R. Huerta ◽  
A. García ◽  
M. Avila-Aoki
Keyword(s):  
Semileptonic Decays ◽  
Charm Baryons ◽  
Quark Models

Predictions for semileptonic decays of charm baryons. II. Nonrelativistic and MIT bag quark models

1989 ◽  
Vol 40 (9) ◽  
pp. 2955-2966 ◽  
Author(s):  
R. Pérez-Marcial ◽  
R. Huerta ◽  
A. García ◽  
M. Avila-Aoki
Keyword(s):  
Semileptonic Decays ◽  
Charm Baryons ◽  
Quark Models

Predictions for semileptonic decays of charm baryons. I. SU(4)-symmetry limit

1989 ◽  
Vol 40 (9) ◽  
pp. 2944-2954 ◽  
Author(s):  
M. Avila-Aoki ◽  
A. García ◽  
R. Huerta ◽  
R. Pérez-Marcial
Keyword(s):  
Semileptonic Decays ◽  
Symmetry Limit ◽  
Charm Baryons

Predictions for Charm Baryon Semileptonic Decays in the SU(4) Limit, the Non-relativistic, and MIT Bag Quark Models

1989 ◽  
Vol 578 (1 The Fourth Fa) ◽  
pp. 420-423
Author(s):  
R. PÉREZ-MARCIAL ◽  
R. HUERTA ◽  
A. GARCÍA ◽  
M. AVILA-AOKI
Keyword(s):  
Semileptonic Decays ◽  
Charm Baryon ◽  
Quark Models

Uraltsev's and other sum rules, theory and phenomenology of D**'s

2015 ◽  
Vol 30 (10) ◽  
pp. 1543009 ◽  
Author(s):  
Alain Le Yaouanc ◽  
Olivier Pène
Keyword(s):  
Lattice Qcd ◽  
Quark Model ◽  
Sum Rules ◽  
Experimental Situation ◽  
Semileptonic Decays ◽  
Physical Situation ◽  
Mass Limit ◽  
Quark Masses ◽  
Infinite Mass ◽  
Quark Models

We first discuss Uraltsev's and other sum rules constraining the B → D**(L = 1) weak transitions in the infinite mass limit, and compare them with dynamical approaches in the same limit. After recalling these well established facts, we discuss how to apply infinite mass limit to the physical situation. We provide predictions concerning semileptonic decays and non-leptonic ones, based on quark models. We then present in more detail the dynamical approaches: the relativistic quark model à la Bakamjian–Thomas and lattice QCD. We summarise lattice QCD results in the infinite mass limit and compare them to the quark model predictions. We then present preliminary lattice QCD results with finite b and c quark masses. A systematic comparison between theory and experiment is performed. We show that some large discrepancies exist between different experiments. Altogether the predictions at infinite mass are in fair agreement with experiment for non-leptonic decays contrary to what happens for semileptonic decays. We conclude by considering the prospects to clarify both the experimental situation, the theoretical one and the comparison between both.

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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