scholarly journals The Relativistic Formula for the Leptonic Decay Widths of Vector Mesons and an Estimate of Quark-Pair Creation Effect

1980 ◽  
Vol 63 (6) ◽  
pp. 2140-2144 ◽  
Author(s):  
H. Ito
Keyword(s):  
Pair Creation ◽  
Leptonic Decay ◽  
Vector Mesons ◽  
Decay Widths ◽  
Relativistic Formula

Retraction: Leptonic decay widths of vector mesons in a relativistic potential model

2014 ◽  
Vol 92 (5) ◽  
pp. 458-458
Author(s):  
S.N. Jena ◽  
R.N. Mishra ◽  
P.K. Nanda ◽  
S. Sahoo
Keyword(s):  
Potential Model ◽  
Leptonic Decay ◽  
Vector Mesons ◽  
Decay Widths ◽  
Relativistic Potential

LEPTONIC DECAY WIDTHS OF VECTOR MESONS IN A RELATIVISTIC POTENTIAL MODEL

2014 ◽  
Vol 92 (5) ◽  
Author(s):  
S.N. Jena ◽  
R.N. Mishra ◽  
P.K. Nanda ◽  
S. Sahoo
Keyword(s):  
Potential Model ◽  
Transition Probability ◽  
Center Of Mass ◽  
Heavy Meson ◽  
Leptonic Decay ◽  
Vector Mesons ◽  
Electromagnetic Decay ◽  
Decay Constants ◽  
Decay Widths ◽  
Experimental Values

Leptonic decay widths and the corresponding decay constants of neutral vector mesons are calculated in the framework of a square-root potential model of independent quarks. Starting with the assumption that a strong correlation exists between the momenta of the quark and anti-quark inside the meson so as to have their total momenta identically zero in the center-of-mass frame of the meson, we find the quark and anti-quark momentum distribution amplitude which is used to determine the transition probability amplitude for the leptonic decay of mesons. The calculated results for leptonic decay widths and the electromagnetic decay constants for the vector mesons \rho, \omega, \phi and \psi are in good agrement with the corresponding experimental values. The results for the heavy meson \Upsilon are somewhat lower than the experimental values.

Leptonic decays of vector mesons in a power-law potential model of independent quarks

2014 ◽  
Vol 29 (13) ◽  
pp. 1450067 ◽  
Author(s):  
S. N. Jena ◽  
P. K. Nanda ◽  
S. Sahoo ◽  
P. Panda
Keyword(s):  
Power Law ◽  
Radiative Decay ◽  
Potential Model ◽  
Transition Probability ◽  
Leptonic Decay ◽  
Model Parameters ◽  
Vector Mesons ◽  
Leptonic Decays ◽  
Momentum Distribution Function ◽  
Decay Widths

A relativistic power-law potential model of independent quarks is used to study the leptonic decays of neutral vector mesons. Here, the transition probability amplitude for leptonic decay of meson is determined from the momentum distribution function which is found from the assumption of a strong correlation existing between the momenta of quark and antiquark inside the meson. The model parameters are first determined from the application of the model to study the ground state spectra of ρ, ω, ϕ, ψ and ϒ mesons together with the radiative decay widths of mesons. The same model with no adjustable parameters is then used to evaluate the leptonic decay widths and the electromagnetic decay constants for the vector mesons ρ, ω, ϕ, ψ and ϒ. The calculated results are in remarkable agreement with the corresponding experimental values.

scholarly journals HEAVY QUARKONIUM IN THE DUAL GINZBURG–LANDAU THEORY OF QCD

1996 ◽  
Vol 11 (15) ◽  
pp. 2677-2688 ◽  
Author(s):  
KATSUHIKO SUZUKI ◽  
HIROSHI TOKI
Keyword(s):  
Gluon Propagator ◽  
Landau Theory ◽  
Light Quark ◽  
Pair Creation ◽  
Leptonic Decay ◽  
Heavy Quarkonium ◽  
Ginzburg Landau ◽  
Color Confinement ◽  
Decay Widths ◽  
The Masses

We study the masses and leptonic decay widths of the heavy quarkonium in the dual Ginzburg–Landau (DGL) theory of QCD, in which the Abelian monopole condensation plays an essential role for color confinement. The effect of color screening due to the light quark pair creation is introduced by the infrared momentum cutoff in the gluon propagator. We find that the color screening effect is important for reproducing the properties of the heavy quarkonium, in particular the leptonic decay width. We also discuss the underlying systematics of the heavy quark spectroscopy in the DGL theory.

VECTOR MESON MODIFICATION IN NUCLEAR MATTER AT CLAS

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2417-2420 ◽  
Author(s):  
CHADEN DJALALI ◽  
MIKE WOOD ◽  
RAKHSHA NASSERIPOUR ◽  
DENNIS WEYGAND ◽  
The CLAS COLLABORATION
Keyword(s):  
Vector Meson ◽  
Nuclear Matter ◽  
Leptonic Decay ◽  
Meson Mass ◽  
Combinatorial Background ◽  
Vector Mesons ◽  
Jefferson Lab ◽  
Mass Distributions ◽  
Collisional Broadening ◽  
Large Acceptance

Photoproduction of vector mesons off nuclei were performed at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). The properties of the ρ vector mesons were investigated via their rare leptonic decay to e+e−. After subtracting the combinatorial background, the ρ meson mass distributions were extracted for each of the targets. We observe no effects on the mass of the ρ meson, some widening in titanium and iron is observed consistent with the collisional broadening.

Vacuum Structure, Chiral Symmetry Breaking and Radiative Decays of Vector Mesons

1997 ◽  
Vol 06 (01) ◽  
pp. 121-134
Author(s):  
A. R. Panda ◽  
K. C. Roy
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Radiative Decay ◽  
Constituent Quark ◽  
Chiral Symmetry Breaking ◽  
Vector Mesons ◽  
Model Calculations ◽  
Vacuum Structure ◽  
Quark Field ◽  
Decay Widths

The radiative decay widths of vector mesons were considered in a model involving chiral symmetry breaking through a nontrivial vacuum structure where the pion and kaon being treating consistently yield the constituent quark wave functions, approximately the same as that obtained from the gap equations and thus in a way determine the constituent quark field operators. Like its earlier success to some low energy hadronic phenomena, here also the model calculations of radiative decay widths of mesons are in reasonable agreements with other theoretical estimations as well as experimental measurements.

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