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1.
A relativistic model of independent quarks based on Dirac equation with an equally mixed scalar-vector square root confining
potential is used to compute the quark core contributions to the static properties like magnetic moments, charge radii and
axial vector coupling constant ratios of the baryon octet. The results obtained with appropriate corrections due to centre-of-mass
motion agree fairly well with experimental values. The model is also extended to the study of magnetic moments of the quark
core of baryons in the charmed andb-flavoured sectors and the overall predictions so obtained compare well with other model predictions. 相似文献
2.
A simple independent-quark-model based on the Dirac equation with logarithmic potential is used to calculate several properties
of octet baryons such as magnetic moment, the axial vector coupling constantg
A (n) for neutronβ-decay and the charge radius of the proton. In view of the simplicity of the model, the results obtained are quite good. 相似文献
3.
The magnetic moments of charmed baryons are studied in the covariant oscillator quark model including isospin symmetry breaking
effect. In the uncharmed sector, the results differ from those obtained using conventional non-relativistic quark model (nrqm). But in the charmed sector the present values are much nearer to thenrqm results than those calculated using models with hadron mass dependence. 相似文献
4.
The nucleon electromagnetic form factorsG
E
P
(q2),G
M
P
(q2) and the axial-vector form factor GA(q2) are studied in a relativistic model of independent quarks confined by an equally mixed scalar-vector square root potentialV
q(r)=1/2(1+γ
0)(ar
1/2+ν
0) taking into account the appropriate centre-of-mass corrections. The respective root-mean-square radii associated withG
E
P
(q2) and G
A
(q2) come out as [〈r
2〉
E
P
]1/2=0.86 fm and 〈r
A
2
〉1/2=0.88 fm. Restoration of chiral symmetry in this model is discussed to derive the pion-nucleon form factorG
πNN(q2) and consequently the pion-nucleon coupling constant is obtained asg
πNN(q2)=12.81 as compared tog
πNN(q2)exp⋍13. 相似文献
5.
P K Chatley 《Pramana》1983,20(2):143-156
We investigate how a new bag phenomenology with a variable bag pressure as its main ingredient is successful in reproducing
various properties of heavy hadrons. Our results for masses, magnetic moments and M1 radiative decay widths indicate that
these properties arise in a natural and consistent manner from the theory and that no additionalad hoc assumption is required to explain them. 相似文献