Strong decay widths ofbb¯states above threshold

1981 ◽  
Vol 23 (5) ◽  
pp. 1118-1123 ◽  
Author(s):  
Seiji Ono
Keyword(s):  
Strong Decay ◽  
Decay Widths

scholarly journals Strong decays of heavy tensor mesons in QCD sum rules

2016 ◽  
Vol 31 (06) ◽  
pp. 1650036 ◽  
Author(s):  
Zhen-Yu Li ◽  
Zhi-Gang Wang ◽  
Guo-Liang Yu
Keyword(s):  
Decay Width ◽  
Sum Rules ◽  
Order Approximation ◽  
Coupling Constants ◽  
Leading Order ◽  
Strong Decay ◽  
Qcd Sum Rules ◽  
Consistent Description ◽  
Decay Widths ◽  
Tensor Formula

In this paper, the tensor–vector–pseudoscalar (TVP) type of vertices are analyzed with the QCD sum rules (QCDSR) and the local-QCD sum rules (SR) in the leading-order approximation and the hadronic coupling constants [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] together with the corresponding decay widths are then calculated. The results indicate that QCDSR as well as the local-QCDSR give a consistent description. The calculated strong decay widths and decay width ratios are compared with the available experimental and other theoretical values. Finally, the total widths [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] are discussed in detail. The results show that these total widths are underestimated, especially for the tensor [Formula: see text] and [Formula: see text] mesons where the obtained predictions are almost a factor of 2 lower than measured decay widths.

scholarly journals NJL INTERACTION DERIVED FROM QCD: VECTOR AND AXIAL-VECTOR MESONS

2009 ◽  
Vol 24 (13) ◽  
pp. 2415-2430 ◽  
Author(s):  
B. A. ARBUZOV ◽  
M. K. VOLKOV ◽  
I. V. ZAITSEV
Keyword(s):  
Quark Mass ◽  
Light Quark ◽  
Axial Vector ◽  
Vector Mesons ◽  
Strong Decay ◽  
Njl Model ◽  
Pseudoscalar Mesons ◽  
Decay Widths ◽  
Light Quark Mass ◽  
Existing Data

In previous works effective nonlocal SU (2)× SU (2) NJL model was proposed in which all the parameters are expressed through those of the fundamental QCD: current light quark mass m0 and average nonperturbative αs. The results for scalar and pseudoscalar mesons are in satisfactory correspondence to existing data. In the present work the same model without introduction of any additional parameters is applied for a description of masses and strong decay widths of ρ- and a1-mesons. The results for both scalar and vector sectors agree with data up to accuracy of the model.

scholarly journals Quark Structure of the X (4500), X (4700) and χc(4P,5P) States

2021 ◽  
Vol 9 ◽  
Author(s):  
J. Ferretti ◽  
E. Santopinto
Keyword(s):  
Quark Model ◽  
Channel Model ◽  
The Other ◽  
Strong Decay ◽  
Decay Widths ◽  
Quark Structure ◽  
Coupled Channel ◽  
Mass Shifts ◽  
Formula Assignment

We study some of the main properties (masses and open-flavor strong decay widths) of 4P and 5P charmonia. While there are two candidates for the χc0(4P,5P) states, the X(4500) and X(4700), the properties of the other members of the χc(4P,5P) multiplets are still completely unknown. With this in mind, we start to explore the charmonium interpretation for these mesons. Our second goal is to investigate if the apparent mismatch between the Quark Model (QM) predictions for χc0(4P,5P) states and the properties of the X(4500) and X(4700) mesons can be overcome by introducing threshold corrections in the QM formalism. According to our coupled-channel model results for the threshold mass shifts, the χc0(5P)→X(4700) assignment is unacceptable, while the χc0(4P)→X(4500) or X(4700) assignments cannot be completely ruled out.

scholarly journals Heavy-quark mesons in the diabatic approach: string breaking and the quarkoniumlike spectrum

2022 ◽  
Vol 258 ◽  
pp. 04001
Author(s):  
Roberto Bruschini
Keyword(s):  
Lattice Qcd ◽  
Heavy Quark ◽  
Strong Decay ◽  
Molecular Physics ◽  
Decay Widths ◽  
Oppenheimer Approximation ◽  
Potential Matrix ◽  
Molecular Components ◽  
Unified Description

The Born-Oppenheimer approximation provides a description of heavy-quark mesons firmly based on lattice QCD, but its validity is limited to the lightest states lying far below the first open-flavour meson-meson threshold. This limitation can be overcome in the diabatic framework, a formalism first introduced in molecular physics, where the dynamics is encoded in a potential matrix whose elements can be derived from unquenched lattice QCD studies of string breaking. The off-diagonal elements of the potential matrix provide interaction between heavy quark-antiquark and meson-meson pairs, from which the mixing of quarkonium states with molecular components and the OZI-allowed strong decay widths are directly calculated. This allows for a QCD-based unified description of conventional quarkonium and unconventional mesons containing quark-antiquark and meson-meson components, what has proved to be successful for charmoniumlike and bottomoniumlike resonances.

scholarly journals Axial Couplings and Strong Decay Widths of Heavy Hadrons

2012 ◽  
Vol 108 (17) ◽  
Author(s):  
William Detmold ◽  
C.-J. David Lin ◽  
Stefan Meinel
Keyword(s):  
Strong Decay ◽  
Decay Widths
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