scholarly journals Analysis of Ds⁎D⁎K⁎ and Ds1D1K⁎ Vertices in Three-Point Sum Rules

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
M. Janbazi ◽  
R. Khosravi ◽  
E. Noori
Keyword(s):  
Correlation Function ◽  
Quantum Chromodynamics ◽  
Sum Rules ◽  
Gluon Condensate ◽  
Coupling Constants ◽  
Predictive Methods ◽  
Nonperturbative Effect

In this study, the coupling constants of Ds⁎D⁎K⁎ and Ds1D1K⁎ vertices were determined within the three-point Quantum chromodynamics sum rules method with and without consideration of the SUf(3) symmetry. The coupling constants were calculated for off-shell charm and K⁎ cases. Considering the nonperturbative effect of the correlation function, as the most important contribution, the quark-quark, quark-gluon, and gluon-gluon condensate corrections were estimated and were compared with other predictive methods.

scholarly journals Investigation of the Rare ExclusiveBc*→Dsνν-Decays in the Framework of the QCD Sum Rules

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
V. Bashiry
Keyword(s):  
Correlation Function ◽  
Decay Width ◽  
Sum Rules ◽  
Branching Ratio ◽  
Form Factors ◽  
Gluon Condensate ◽  
Qcd Sum Rules

ExclusiveBc*→Dsνν-decay is studied in the framework of the three-point QCD sum rules approach. The two gluon condensate contributions to the correlation function are calculated and the form factors of this transition are found. The decay width and total branching ratio for this decay are also calculated.

D(1±) AND Ds(1±) MESONS SPECTROSCOPY IN GAUSSIAN SUM RULES

2009 ◽  
Vol 18 (01) ◽  
pp. 161-174
Author(s):  
SHUIGUO WEN ◽  
JUEPING LIU
Keyword(s):  
Experimental Data ◽  
Quantum Chromodynamics ◽  
Sum Rules ◽  
Coupling Constants ◽  
Sum Rule ◽  
Gaussian Sum ◽  
Rule Approach

The Gaussian sum rules (GSRs) for the D(1±) and Ds(1±) mesons current are obtained by means of Laplacian transformation. Based on it, the GSRs for the mass and the coupling constants of D(1±) and Ds(1±) mesons are worked out. Using the standard input of quantum chromodynamics nonperturbative parameters, the corresponding curves and tables are presented. The results are in accordance well with the experimental data, and more well than those from the Borel sum rule approach.

Quantum chromodynamics sum rules and J/ψ → ηcγ decay

1985 ◽  
Vol 260 (1) ◽  
pp. 61-78 ◽  
Author(s):  
V.A. Beilin ◽  
A.V. Radyushkin
Keyword(s):  
Quantum Chromodynamics ◽  
Sum Rules

scholarly journals ON THE QUANTUM CHROMODYNAMICS OF A MASSIVE VECTOR FIELD IN THE ADJOINT REPRESENTATION

2013 ◽  
Vol 28 (14) ◽  
pp. 1350054 ◽  
Author(s):  
ALFONSO R. ZERWEKH
Keyword(s):  
Vector Field ◽  
Quantum Chromodynamics ◽  
Extra Dimensions ◽  
Scalar Fields ◽  
Discrete Symmetry ◽  
Adjoint Representation ◽  
Coupling Constants ◽  
Gauge Symmetries ◽  
Gauge Fixing ◽  
Definition Of

In this paper, we explore the possibility of constructing the quantum chromodynamics of a massive color-octet vector field without introducing higher structures like extended gauge symmetries, extra dimensions or scalar fields. We show that gauge invariance is not enough to constraint the couplings. Nevertheless, the requirement of unitarity fixes the values of the coupling constants, which otherwise would be arbitrary. Additionally, it opens a new discrete symmetry which makes the coloron stable and avoid its resonant production at a collider. On the other hand, a judicious definition of the gauge fixing terms modifies the propagator of the massive field making it well-behaved in the ultraviolet limit. The relation between our model and the more general approach based on extended gauge symmetries is also discussed.

scholarly journals Interface junctions in QCD${}_4$

2021 ◽  
Vol 10 (4) ◽  
Author(s):  
Pranay Gorantla ◽  
Ho Tat Lam
Keyword(s):  
Effective Field Theories ◽  
Quantum Chromodynamics ◽  
Effective Field ◽  
Low Energy ◽  
Coupling Constants ◽  
Field Theories ◽  
Scalar Theory ◽  
Complex Mass ◽  
Spatially Varying ◽  
Chern Simons

We study 3+1 dimensional SU(N)SU(N) Quantum Chromodynamics (QCD) with N_fNf degenerate quarks that have a spatially varying complex mass. It leads to a network of interfaces connected by interface junctions. We use anomaly inflow to constrain these defects. Based on the chiral Lagrangian and the conjectures on the interfaces, characterized by a spatially varying \thetaθ-parameter, we propose a low-energy description of such networks of interfaces. Interestingly, we observe that the operators in the effective field theories on the junctions can carry baryon charges, and their spin and isospin representations coincide with baryons. We also study defects, characterized by spatially varying coupling constants, in 2+1 dimensional Chern-Simons-matter theories and in a 3+1 dimensional real scalar theory.

QCD sum rules for the coupling constants g KYN and g KYΞ

2007 ◽  
Vol 70 (5) ◽  
pp. 925-937
Author(s):  
T. Aliev ◽  
V. S. Zamiralov ◽  
S. N. Lepshokov ◽  
A. Özpineci ◽  
S. B. Yakovlev
Keyword(s):  
Sum Rules ◽  
Coupling Constants ◽  
Qcd Sum Rules
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