Re-examined radiative decayB*q Bq  in light-cone quantum chromodynamics

2002 ◽  
Vol 28 (10) ◽  
pp. 2583-2595 ◽  
Author(s):  
Zuo-Hong Li ◽  
Xiang-Yao Wu ◽  
Tao Huang
Keyword(s):  
Quantum Chromodynamics ◽  
Light Cone

Charmonia production in W → (cc̄)Ds(∗) decays

2021 ◽  
Vol 36 (09) ◽  
pp. 2150058
Author(s):  
A. V. Luchinsky ◽  
A. K. Likhoded
Keyword(s):  
Quantum Chromodynamics ◽  
Light Cone ◽  
Relativistic Quantum ◽  
Branching Fractions ◽  
Color Singlet ◽  
Leading Order ◽  
Paper Production ◽  
Quantum Numbers ◽  
Numerical Predictions ◽  
State Formula

In this paper, production of charmonium state [Formula: see text] in exclusive [Formula: see text] decays is analyzed in the framework of both leading order Non-relativistic Quantum Chromodynamics (NRQCD) and light-cone (LC) expansion models. Analytical and numerical predictions for the branching fractions of these decays in both the approaches are given. The typical value of the branching fractions is [Formula: see text][Formula: see text][Formula: see text] and it turns out that the LC results are significantly larger than NRQCD ones (approximately two or four times increase depending on the quantum numbers of the final particles), so the effect of internal quark motion should be taken into account. Some rough estimates of color-octet contributions are presented and it is shown that these contributions could be comparable with color-singlet results.

scholarly journals Double charmonia production in exclusive Z-boson decays

2018 ◽  
Vol 33 (14) ◽  
pp. 1850078 ◽  
Author(s):  
A. K. Likhoded ◽  
A. V. Luchinsky
Keyword(s):  
Quantum Chromodynamics ◽  
Z Boson ◽  
Light Cone ◽  
Relativistic Quantum ◽  
Branching Fractions ◽  
Systematic Analysis ◽  
Charmonium Production ◽  
Theoretical Predictions ◽  
Z Boson Decays

This paper is devoted to systematic analysis of double charmonium production in exclusive Z-boson decays in the framework of non-relativistic quantum chromodynamics (NRQCD) and leading twist light-cone (LC) models. Theoretical predictions for branching fractions of all considered decays are presented. According to the obtained results in the case of the allowed helicity suppression rule processes, the effect of internal quark motion increases the branching fractions by a factor 1.5, while for forbidden reactions the LC predictions are strictly zero, while NRQCD ones are significantly smaller than for allowed.

The light-cone gauge

1986 ◽  
Vol 64 (5) ◽  
pp. 624-632 ◽  
Author(s):  
H. C. Lee
Keyword(s):  
Quantum Chromodynamics ◽  
Quantum Electrodynamics ◽  
Light Cone ◽  
Field Theories ◽  
Special Role ◽  
Quantum Field Theories ◽  
Quantum Field ◽  
Light Cone Gauge ◽  
Yang Mills ◽  
Kaluza Klein

Some aspects of recent development in the light-cone gauge and its special role in quantum-field theories are reviewed. Topics discussed include the two- and four-component formulations of the light-cone gauge, Slavnov–Taylor and Becchi– Rouet–Stora identities, quantum electrodynamics, quantum chromodynamics, renormalization of Yang–Mills theory and supersymmetric theory, gravity, and the quantum-induced compactification of Kaluza–Klein theories in the light-cone gauge.

scholarly journals TWO-DIMENSIONAL QUANTUM CHROMODYNAMICS ON A CYLINDER

1992 ◽  
Vol 07 (40) ◽  
pp. 3783-3788 ◽  
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.

The light-cone approach for the calculation of hadronic states

1989 ◽  
Vol 67 (12) ◽  
pp. 1162-1167
Author(s):  
Ralph Girard ◽  
Alexander Langnau
Keyword(s):  
Integral Equation ◽  
Numerical Solution ◽  
Quantum Chromodynamics ◽  
Integral Equations ◽  
Light Cone ◽  
Bound States ◽  
Light Cone Quantization ◽  
General Method ◽  
The Continuum ◽  
Hadronic States

We present an application of the recently proposed method of discretized light-cone quantization to quantum chromodynamics (QCD). We present the general method of light-cone quantization and point out its usefulness for the derivation of covariant integral equations for bound states. We then apply it to QCD and obtain the integral equation for the bound states in the valence sector of the mesons. The numerical solution of the integral equation shows a nice transition to the continuum. The conclusion summarizes the main results and discusses briefly what should be the next improvements of this method.

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