scholarly journals Relativity and constituent quark structure in model calculations of parton distributions

2004 ◽  
Vol 70 (9) ◽  
Author(s):  
Santiago Noguera ◽  
Sergio Scopetta ◽  
Vicente Vento
Keyword(s):  
Constituent Quark ◽  
Model Calculations ◽  
Parton Distributions ◽  
Quark Structure

On the constituent quark structure

1995 ◽  
Author(s):  
Adam Szczepaniak ◽  
Chueng-Ryong Ji ◽  
Stephen R. Cotanch
Keyword(s):  
Constituent Quark ◽  
Quark Structure

scholarly journals Six-quark structure of d*(2380) in a chiral constituent quark model

2017 ◽  
Vol 96 (1) ◽  
Author(s):  
Qi-Fang Lü ◽  
Fei Huang ◽  
Yu-Bing Dong ◽  
Peng-Nian Shen ◽  
Zong-Ye Zhang
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Quark Structure

scholarly journals Double Parton Distributions in Light-Front Constituent Quark Models

2014 ◽  
Vol 56 (6-9) ◽  
pp. 515-521 ◽  
Author(s):  
Matteo Rinaldi ◽  
Sergio Scopetta ◽  
Marco Traini ◽  
Vicente Vento
Keyword(s):  
Constituent Quark ◽  
Light Front ◽  
Parton Distributions ◽  
Quark Models

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.

Deep inelastic parton distributions and the constituent quark model

1992 ◽  
Vol 544 (3-4) ◽  
pp. 731-746 ◽  
Author(s):  
Marco Traini ◽  
Laura Conci ◽  
Ugo Moschella
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Parton Distributions

scholarly journals STRUCTURE OF Λ*(1405) AND THE Λ*-MESON-BARYON COUPLING CONSTANTS

2011 ◽  
Vol 26 (03n04) ◽  
pp. 619-621 ◽  
Author(s):  
C. S. AN ◽  
B. SAGHAI
Keyword(s):  
Quark Model ◽  
Decay Width ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Coupling Constants ◽  
Strong Decay ◽  
Quark Structure

Within an extended chiral constituent quark model, three- and five-quark structure of the S01 resonance Λ(1405) is investigated with respect to the coupling constants [Formula: see text] and [Formula: see text]. Our findings corroborate with about 50% of five-quark admixture in the Λ(1405) needed in reproducing the strong decay width, ΓΛ(1405)→(Σπ)°.

CALCULATING SPIN-DEPENDENT PARTON DISTRIBUTIONS IN THE BAG MODEL

2003 ◽  
Vol 18 (08) ◽  
pp. 1391-1395 ◽  
Author(s):  
A. I. SIGNAL
Keyword(s):  
Experimental Data ◽  
Nuclear Physics ◽  
Lower Energy ◽  
Valence Quark ◽  
High Energy ◽  
Nucleon Structure ◽  
Pion Cloud ◽  
Model Calculations ◽  
Parton Distributions

Model calculations of parton distributions are an important way to connect our knowledge of physics at high energy scales with physics at lower energy scales typical of nuclear physics. Earlier work on the spin-independent valence quark distributions has shown that DIS data support a bag radius around 0.8 fm, and highlighted the importance of chiral symmetry and the role of the pion cloud in nucleon structure. Here, that work is extended to the spin-dependent parton distributions. We calculate these distributions in the model and compare with experimental data.

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