Electromagnetic Form Factors and Static Properties of the Nucleons in a Chiral Symmetric Quark Model

1998 ◽  
Vol 07 (01) ◽  
pp. 69-88 ◽  
Author(s):  
S. N. Jena ◽  
M. R. Behera

Nucleon charge and magnetic form factors [Formula: see text] are computed in an independent-quark model with an equally mixed scalar and vector confining potential in square root form taking into account the corrections due to center-of-mass motion and pion-clound effects. The values obtained for the nucleon static properties such as the magnetic moment, charge radius and axial vector coupling constant in the neutron beta decay process agree reasonably with the corresponding experimental data. The pseudo-scalar and pseudo-vector pion-nucleon coupling constants are found to be gNNπ=13.43 and fNNπ=0.282, which are in excellent agreement with the experimental data.

1992 ◽  
Vol 07 (27) ◽  
pp. 6813-6831 ◽  
Author(s):  
N. BARIK ◽  
S.N. JENA ◽  
D.P. RATH

Incorporating corrections for the center-of-mass motion and pion-cloud effects the nucleon electromagnetic form factors [Formula: see text] are computed in an independent quark model based on the Dirac equation with a confining potential [Formula: see text] The static quantities like magnetic moment μN, charge radius [Formula: see text] and axial vector coupling constant (gA)n→peν of the nucleons computed in this model are in reasonable agreement with the experiment. The pseudoscalar and the pseudovector pion-nucleon coupling constants are obtained as gNNπ=13.52 and fNNπ=0.284, which are in excellent agreement with the experimental data.


1992 ◽  
Vol 07 (12) ◽  
pp. 2841-2861 ◽  
Author(s):  
S. N. JENA ◽  
S. PANDA

A simple independent-quark model based on the Dirac equation with an equally mixed scalar–vector linear confining potential model is used to obtain a fit for the electromagnetic properties — like the magnetic moments, charge radii and axial-vector coupling-constant ratios — of octet baryons, taking into account the appropriate center-of-mass corrections. This fit is extended to include the quark-core contributions to the nucleon electromagnetic form factors [Formula: see text], [Formula: see text], [Formula: see text] and the axial-vector form factor GA(q2). The respective root-mean-square radii associated with [Formula: see text] and GA(q2) come out as [Formula: see text] and [Formula: see text]. The possibility of restoring in this model the chiral symmetry in the usual way is discussed and the pion-nucleon coupling constant is found as gπ NN = 13.72 as compared to (gπ NN ) exp ≃ 13.


1981 ◽  
Author(s):  
D. A. Jensen ◽  
M. N. Kreisler ◽  
F. Lomanno ◽  
R. Poster ◽  
M. S. Z. Rabin ◽  
...  

1993 ◽  
Vol 560 (4) ◽  
pp. 1003-1013 ◽  
Author(s):  
P.R. Page ◽  
R.J. Lindebaum ◽  
R.D. Viollier

1990 ◽  
Vol 41 (5) ◽  
pp. 1568-1577 ◽  
Author(s):  
N. Barik ◽  
S. N. Jena ◽  
D. P. Rath

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