B MESON LIGHT-CONE DISTRIBUTION AMPLITUDES AND HEAVY-QUARK SYMMETRY

We present a systematic study of the B meson light-cone distribution amplitudes which are relevant for the QCD factorization approach for the exclusive B meson decays. We construct representations for the quark-antiquark distribution amplitudes in terms of independent dynamical degrees of freedom, which exactly satisfy the QCD equations of motion and constraints from heavy-quark symmetry.

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

International Journal of Modern Physics A ◽

10.1142/s0217751x11053791 ◽

2011 ◽

Vol 26 (19) ◽

pp. 3185-3199 ◽

Cited By ~ 1

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.

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An analysis of B meson decays to two light pseudoscalar nonets with |ΔS| = 1 in QCD factorization approach

Journal of Physics G Nuclear and Particle Physics ◽

10.1088/0954-3899/41/5/055010 ◽

2014 ◽

Vol 41 (5) ◽

pp. 055010

Author(s):

Janardan P Singh ◽

N G Deshpande

Keyword(s):

B Meson ◽

B Meson Decays ◽

Factorization Approach ◽

Meson Decays ◽

Qcd Factorization

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ANGULAR DISTRIBUTION ANALYSIS OF B → J/ψ K* AND RESOLVING DISCRETE AMBIGUITIES IN THE DETERMINATION OF ϕ1

International Journal of Modern Physics A ◽

10.1142/s0217751x0301485x ◽

2003 ◽

Vol 18 (08) ◽

pp. 1437-1442 ◽

Cited By ~ 1

Author(s):

H.-Y. CHENG ◽

Y.-Y. KEUM ◽

K.-C. YANG

Keyword(s):

Angular Distribution ◽

B Meson ◽

Factorization Method ◽

Distribution Analysis ◽

B Meson Decays ◽

Factorization Approach ◽

Qcd Factorization ◽

The Status ◽

Unitary Triangle

We discuss the angular distribution analysis of B → J/ψ K* decays and a way to resolve discrete ambiguites in the determination of the unitary triangle ϕ1(=β). We study the status of factorization hypothesis in the color-suppressed B meson decays: B → J/ψ K(*) within the general factorization approach and QCD-factorization method.

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REVIEW OF HEAVY QUARK PHYSICS – THEORY

International Journal of Modern Physics A ◽

10.1142/s0217751x05028600 ◽

2005 ◽

Vol 20 (22) ◽

pp. 5080-5094 ◽

Cited By ~ 16

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.

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NONLEPTONIC ANNIHILATION DECAYS OF B MESON WITH A NATURAL INFRARED CUTOFF

International Journal of Modern Physics A ◽

10.1142/s0217751x09044656 ◽

2009 ◽

Vol 24 (22) ◽

pp. 4133-4155 ◽

Cited By ~ 5

Author(s):

A. A. NATALE ◽

C. M. ZANETTI

Keyword(s):

Systematic Study ◽

B Mesons ◽

B Meson ◽

Coupling Constants ◽

Final States ◽

B Decays ◽

Factorization Approach ◽

Infrared Behavior ◽

Qcd Factorization ◽

Infrared Cutoff

Within the QCD factorization approach we compute the amplitudes for pure annihilation channels of B mesons decays into final states containing two pseudoscalar particles. These decays may be plagued by effects like nonperturbative physics and breaking of the factorization hypothesis and imply, at some extent, the introduction of an infrared cutoff in the calculation of amplitudes. We compute the decays with the help of infrared finite gluon propagators and coupling constants that were obtained in different solutions of the QCD Schwinger–Dyson equations. These solutions yield a natural cutoff for the amplitudes, and we argue that a systematic study of these B decays may provide a test for the QCD infrared behavior.

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B → K* ℓ+ ℓ- DECAYS WITH POLARIZED K*

International Journal of Modern Physics A ◽

10.1142/s0217751x03014861 ◽

2003 ◽

Vol 18 (08) ◽

pp. 1443-1448

Author(s):

C. H. CHEN ◽

C. Q. GENG

Keyword(s):

Standard Model ◽

Heavy Quark ◽

B Meson ◽

Form Factors ◽

Decay Chain ◽

New Physics ◽

Effective Theory ◽

Heavy Quark Effective Theory ◽

B Meson Decays ◽

The Standard Model

We study the exclusive decays of B → K* ℓ+ ℓ- within the framework of the PQCD. We obtain the form factors for the B → K* transition in the large recoil region, where the PQCD for heavy B meson decays is reliable. We find that the form factors at q2 = 0 are consistent with those from the large energy effective theory combined with the heavy quark effective theory and the experiment of B → K*γ. Via the decay chain of B → K* (Kπ) ℓ+ ℓ-, we can study many physical observables which are related to the different helicity combinations of B → K* ℓ+ ℓ-, such as the forward-backward asymmetries (FBAs). In particular, we can study the T violating effect which is small in the standard model but can be up to 10% in models with new physics.

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TWO-DIMENSIONAL QUANTUM CHROMODYNAMICS ON A CYLINDER

Modern Physics Letters A ◽

10.1142/s0217732392003219 ◽

1992 ◽

Vol 07 (40) ◽

pp. 3783-3788 ◽

Cited By ~ 4

Author(s):

S. GURUSWAMY ◽

S.G. RAJEEV

Keyword(s):

Quantum Chromodynamics ◽

Gauge Field ◽

Light Cone ◽

Wilson Loop ◽

Degrees Of Freedom ◽

Fock Space ◽

Two Dimensional ◽

Gauge Fixing ◽

Dynamical Degrees

We study two-dimensional quantum chromodynamics with massive quarks on a cylinder in a light-cone formalism. We eliminate the non-dynamical degrees of freedom and express the theory in terms of the quark and Wilson loop variables. It is possible to perform this reduction without gauge fixing. The fermionic Fock space can be defined independent of the gauge field in this light-cone formalism.

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