scholarly journals Quark Effects in the Gluon Condensate Contribution to the Scalar Glueball Correlation Function

2004 ◽  
Vol 2004 (12) ◽  
pp. 037-037 ◽  
Author(s):  
D Harnett ◽  
T.G Steele
Keyword(s):  
Correlation Function ◽  
Gluon Condensate ◽  
Scalar Glueball

scholarly journals Charmonium radiative transitions, meson and glueball particle properties with the effective strong coupling

2019 ◽  
Vol 204 ◽  
pp. 08002
Author(s):  
Gurjav Ganbold
Keyword(s):  
Strong Coupling ◽  
Freezing Point ◽  
Gluon Condensate ◽  
Weak Decay ◽  
Scalar Glueball ◽  
Particle Properties ◽  
Radiative Transitions ◽  
Specific Behaviour ◽  
Quark Models ◽  
Mass Dependent

The particle properties of conventional mesons and scalar glueball, radiative transitions of charmonium excited states χcJ (J = 0, 1, 2) are studied in the framework of relativistic quark models with infrared confinement by taking into account the mass dependence of the effective strong coupling. A specific behaviour of the mass-dependent strong coupling with a freezing point αs (0) = 1.032 has been revealed. The spectrum and leptonic (weak) decay constants of conventional mesons have been calculated in good agreement with the latest experimental data. New estimates on the scalar glueball mass, ’radius’ and gluon condensate value have been obtained. Dominant radiative transitions of the charmonium orbital excitations χcJ → J/ψ + γ have been studied and the partial decay widths have been estimated with reasonable accuracy.

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.

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.

INVESTIGATING AdS/QCD DUALITY THROUGH THE SCALAR GLUEBALL CORRELATOR

2009 ◽  
Vol 24 (22) ◽  
pp. 4177-4192 ◽  
Author(s):  
P. COLANGELO ◽  
F. DE FAZIO ◽  
F. JUGEAU ◽  
S. NICOTRI
Keyword(s):  
Gluon Condensate ◽  
Dilaton Field ◽  
Wall Model ◽  
Scalar Glueball ◽  
Gluon Condensates ◽  
Soft Wall Model ◽  
Soft Wall ◽  
Point Correlation ◽  
Point Correlation Function

We investigate AdS/QCD duality for the two-point correlation function of the lowest dimension scalar glueball operator, in the case of the IR soft wall model. We point out the role of the boundary conditions for the bulk-to-boundary propagator in determining the gluon condensates. We show how a low energy QCD theorem can be obtained within the AdS approach, together with a gluon condensate close to the commonly accepted value and robust against perturbation of the background dilaton field.

Rate Constants, Reactive Flux

2018 ◽  
Author(s):  
Niels Engholm Henriksen ◽  
Flemming Yssing Hansen
Keyword(s):  
Correlation Function ◽  
Rate Constant ◽  
Cross Sections ◽  
Time Correlation ◽  
Time Correlation Function ◽  
Exact Expression ◽  
Reaction Cross ◽  
Dividing Surface ◽  
Definition Of ◽  
Reactive Flux

This chapter discusses a direct approach to the calculation of the rate constant k(T) that bypasses the detailed state-to-state reaction cross-sections. The method is based on the calculation of the reactive flux across a dividing surface on the potential energy surface. Versions based on classical as well as quantum mechanics are described. The classical version and its relation to Wigner’s variational theorem and recrossings of the dividing surface is discussed. Neglecting recrossings, an approximate result based on the calculation of the classical one-way flux from reactants to products is considered. Recrossings can subsequently be included via a transmission coefficient. An alternative exact expression is formulated based on a canonical average of the flux time-correlation function. It concludes with the quantum mechanical definition of the flux operator and the derivation of a relation between the rate constant and a flux correlation function.

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