scholarly journals STRANGENESS PHYSICS WITH CLAS

2010 ◽  
Vol 19 (12) ◽  
pp. 2335-2342
Author(s):  
Volker D. Burkert
Keyword(s):  
Quark Model ◽  
Excited States ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Future Prospects ◽  
Nucleon Resonances ◽  
The Future ◽  
Electromagnetic Probes

A brief overview of strangeness physics with the CLAS detector at JLab is given, mainly covering the domain of nucleon resonances. Several excited states predicted by the symmetric constituent quark model may have significant couplings to the KΛ or KΣ channels. We will discuss data that are relevant in the search for such states in the strangeness channel, and give an outlook on the future prospects of the N * program at JLab with electromagnetic probes.

The Λ(1520) photoproduction from proton

2014 ◽  
Vol 29 ◽  
pp. 1460235 ◽  
Author(s):  
Jun He
Keyword(s):  
Experimental Data ◽  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Lagrangian Method ◽  
Nucleon Resonance ◽  
Proton Target ◽  
Nucleon Resonances ◽  
Effective Lagrangian

The Λ(1520) photoproduction from proton target is investigated within the effective Lagrangian method and well compared with the experimental data. The D13 state N(2120) plays the most important role among the nucleon resonances. Besides N(2120), a nucleon resonance [Formula: see text] predicted by the constituent quark model is found also important to reproduce the experimental data. Other nucleon resonances give negligible contributions in the channel considered in this work.

scholarly journals RADIATIVE LEPTONIC Bc DECAYS

1999 ◽  
Vol 14 (33) ◽  
pp. 2303-2312 ◽  
Author(s):  
P. COLANGELO ◽  
F. DE FAZIO
Keyword(s):  
Quark Model ◽  
Decay Mode ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
The Future

We analyze the radiative leptonic Bc decay mode: Bc→ℓνγ(ℓ=e,μ) using a QCD-inspired constituent quark model. The prediction: ℬ(Bc→ℓνγ)≃3 × 10-5 confirms that this channel is experimentally promising in view of the large number of Bc mesons which are expected to be produced at the future hadron facilities.

scholarly journals Low-lying configurations in a non-relativistic constituent quark model

2007 ◽  
Vol 34 (7) ◽  
pp. 1771-1782 ◽  
Author(s):  
W L Wang ◽  
F Huang ◽  
Z Y Zhang ◽  
Y W Yu ◽  
F Liu
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model

THE NLO QCD CALCULATION OF SEA QUARK DISTRIBUTIONS IN THE CORGI APPROACH, BASED ON THE CONSTITUENT QUARK MODEL

2007 ◽  
Vol 22 (24) ◽  
pp. 4519-4535 ◽  
Author(s):  
A. MIRJALILI ◽  
K. KESHAVARZIAN
Keyword(s):  
Quark Model ◽  
Mellin Transform ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Standard Approach ◽  
Unknown Parameters ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Physical Scale ◽  
Good Agreement

Sea quark distributions in the NLO approximation, based on the phenomenological valon model or constituent quark model are analyzed. We use the parametrized inverse Mellin transform technique to perform a direct fit with available experimental data and obtain the unknown parameters of the distributions. We try to extend the calculation to the NLO approximation for the singlet and nonsinglet cases in DIS phenomena. We do also the same calculation for electron–positron annihilation. The resulting sea distributions are effectively independent of the process used. The approach of complete RG improvement (CORGI) is employed and the results are compared with the standard approach of perturbative QCD in the [Formula: see text] scheme with a physical scale. The comparisons with data are in good agreement. As is expected, the results in the CORGI approach indicate a better agreement to the data than the NLO calculation in the standard approach.

scholarly journals An overview of the hypercentral constituent quark model

2003 ◽  
Vol 50 (2) ◽  
pp. 263-272 ◽  
Author(s):  
M.M Giannini ◽  
E Santopinto ◽  
A Vassallo
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model
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