scholarly journals QCD Factorization and Rare B Meson Decays

2006 ◽  
Vol 21 (04) ◽  
pp. 658-663 ◽  
Author(s):  
DONGSHENG DU
Keyword(s):  
Recent Progress ◽  
B Meson ◽  
Infrared Divergence ◽  
B Decays ◽  
B Meson Decays ◽  
Meson Decays ◽  
Power Corrections ◽  
Qcd Factorization ◽  
Charmless B Decays ◽  
Divergence Problem

Some recent progress in China in the study of charmless B decays with QCD factorization is reviewed. Chirally enhanced power corrections and infrared divergence problem are stressed.

RADIATIVE B MESON DECAYS AT BABAR

2005 ◽  
Vol 20 (02n03) ◽  
pp. 658-660
Author(s):  
FABIO BELLINI
Keyword(s):  
Storage Ring ◽  
B Meson ◽  
Branching Ratio ◽  
B Decays ◽  
Neutral Currents ◽  
B Meson Decays ◽  
Meson Decays ◽  
Flavor Changing ◽  
Rare B Decays ◽  
Babar Detector

Recent BaBar results on rare B decays involving flavor changing neutral currents are presented. New measurements of the CP asymmetries in b→sγ and B→K*γ decays are reported as well as B→K(*)l+l- and b→sl+l- branching ratio measurements. The data sample comprises [Formula: see text] decays collected with the BaBar detector at the PEP-II e+e- storage ring.

scholarly journals REVIEW OF HEAVY QUARK PHYSICS – THEORY

2005 ◽  
Vol 20 (22) ◽  
pp. 5080-5094 ◽  
Author(s):  
AHMED ALI
Keyword(s):  
Heavy Quark ◽  
Heavy Quark Physics ◽  
Recent Progress ◽  
B Meson ◽  
B Meson Decays ◽  
Meson Decays ◽  
B Factory

Recent progress in the theory of B-meson decays is reviewed with emphasis on the aspects related to the B-factory data.

scholarly journals Non-leptonic B Meson Decays using Perturbative QCD

1999 ◽  
Vol 52 (6) ◽  
pp. 949
Author(s):  
Ciprian Dariescu ◽  
Marina-Aura Dariescu
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Perturbative Qcd ◽  
B Meson ◽  
B Decays ◽  
B Meson Decays ◽  
Meson Decays ◽  
Model Predictions

Using perturbative QCD within the framework of Szczepaniak et al. (1990), we analyse different non-leptonic B decays, namely B → Π Π , B → Π (K)D, B → DD, as heavy-to-light transitions dominated by tree diagrams and compare our estimates to experimental data and other theoretical model predictions.

scholarly journals Angular and polarization observables for Majorana-mediated B decays with effective interactions

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
Lucía Duarte ◽  
Gabriel Zapata ◽  
Oscar A. Sampayo
Keyword(s):  
B Meson ◽  
Effective Field ◽  
B Decays ◽  
B Meson Decays ◽  
Effective Interactions ◽  
Meson Decays ◽  
Vector Interaction ◽  
Lepton Colliders ◽  
The Standard Model ◽  
Polarization Observables

AbstractWe probe the effective field theory extending the Standard Model with a sterile neutrino in B meson decays at B factories and lepton colliders, using angular and polarization observables. We put bounds on different effective operators characterized by their distinct Dirac–Lorentz structure, and probe the N-mediated B decays sensitivity to these interactions. We define a forward–backward asymmetry $$A_\mathrm{FB}^{\ell \gamma }$$ A FB ℓ γ between the muon and photon directions for the $$B \rightarrow \mu \nu \gamma $$ B → μ ν γ decay, which allows us to separate the SM contribution from the effective lepton number conserving and violating processes, mediated by a near on-shell N. Using the most stringent constraints on the effective parameter space from Belle and BaBar we find that a measurement of the final polarization $$P_{\tau }$$ P τ in the rare $$B^-\rightarrow \ell ^-_{1}\ell ^-_{2} \pi ^+$$ B - → ℓ 1 - ℓ 2 - π + decays can help us infer the scalar or vector interaction content in the N production or decay vertices. We find that the B meson decays are more sensitive to scalar operators.

scholarly journals CONSTRAINTS ON B→π, K TRANSITION FORM-FACTORS FROM EXCLUSIVE SEMILEPTONIC D-MESON DECAYS

2011 ◽  
Vol 26 (19) ◽  
pp. 3185-3199 ◽  
Author(s):  
FANG SU ◽  
YA-DONG YANG
Keyword(s):  
Phenomenological Study ◽  
B Meson ◽  
D Meson ◽  
Form Factors ◽  
Transition Form ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Meson Decays ◽  
Central Values ◽  
Qcd Factorization

According to the heavy-quark flavor symmetry, the B→π, K transition form-factors could be related to the corresponding ones of D-meson decays near the zero recoil point. With the recent precisely measured exclusive semileptonic decays D →πℓν and D→K ℓν, we perform a phenomenological study of B →π, K transition form-factors based on this symmetry. Using BK, BZ and Series Expansion parametrizations of the form-factor slope, we extrapolate B →π, K transition form-factors from [Formula: see text] to q2 = 0. It is found that, although being consistent with each other within error bars, the central values of our results for B →π, K form-factors at q2 = 0, [Formula: see text], are smaller than predictions of the QCD light-cone sum rules, but are in good agreements with the ones extracted from hadronic B-meson decays within the SCET framework. Moreover, smaller form-factors are also favored by the QCD factorization approach for hadronic B-meson decays.

scholarly journals Lepton flavor non-universality in B-meson decays from a U(2) flavor model

2015 ◽  
Vol 2015 (11) ◽  
Author(s):  
Adam Falkowski ◽  
Marco Nardecchia ◽  
Robert Ziegler
Keyword(s):  
B Meson ◽  
B Meson Decays ◽  
Meson Decays ◽  
Lepton Flavor

scholarly journals |Vub| Determination by B → Dsπ

2003 ◽  
Vol 18 (22) ◽  
pp. 1557-1567 ◽  
Author(s):  
Hideaki Hayakawa ◽  
Kaoru Hosokawa ◽  
Takeshi Kurimoto
Keyword(s):  
Perturbative Qcd ◽  
B Meson ◽  
B Meson Decays ◽  
Meson Decays ◽  
Factorizable Contribution

We investigate [Formula: see text] decay in perturbative QCD approach which has recently been applied to B-meson decays. [Formula: see text] decay (and its charge conjugated mode) can be one of the hopeful modes to determine |Vub| since it occurs through b → u transition only. We estimate both factorizable and non-factorizable contribution, and show that the non-factorizable contribution is much less than the factorizable one. Our calculation gives [Formula: see text].

scholarly journals Composite leptoquarks and anomalies in B-meson decays

2015 ◽  
Vol 2015 (5) ◽  
Author(s):  
Ben Gripaios ◽  
M. Nardecchia ◽  
S. A. Renner
Keyword(s):  
B Meson ◽  
B Meson Decays ◽  
Meson Decays
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