Light baryons and their electromagnetic interactions in the covariant constituent quark model

Abstract

We extend the confined covariant constituent quark model that was previously developed by us for mesons to the baryon sector. In our numerical calculation we use the same values for the constituent quark masses and the infrared cutoff as have been previously used in the meson sector. In a first application we describe the static properties of the proton and neutron, and the $\Lambda$-hyperon (magnetic moments and charge radii) and the behavior of the nucleon form factors at low momentum transfers. We discuss in some detail the conservation of gauge invariance of the electromagnetic transition matrix elements in the presence of a nonlocal coupling of the baryons to the three constituent quark fields.

18 pages, 7 figures

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Cited by in corpus (25)

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• Implications of new physics in the decays $B_c\to (J/\psi ,{\eta }_c)\tau \nu$
• Strong decays of molecular states Zc(+) and Zc'(+)
• Analyzing new physics in the decays ${\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ with form factors obtained from the covariant quark model
• Semileptonic $D_{(s)}$-meson decays in the light of recent data
• Nonleptonic two-body decays of single heavy baryons ${\Lambda }_Q$, ${\Xi }_Q$, and ${\Omega }_Q$ $(Q=b,c)$ induced by $W$ emission in the covariant confined quark model
• Polarization effects in the cascade decay Lambda_b -> Lambda(-> p pi-) + J/psi(-> l+ l-) in the covariant confined quark model
• Heavy-to-light semileptonic decays of Lambda_b and Lambda_c baryons in the covariant confined quark model
• Selected strong decays of $\eta (2225)$ and $\varphi (2170)$ as $\Lambda \bar{\Lambda }$ bound states
• Semileptonic decays ${\Lambda }_c^{+}\to \Lambda {\ell }^{+}{\nu }_{\ell }(\ell =e,\mu )$ in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII
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• Radiative decay Y(4260) -> X(3872) + gamma involving hadronic molecular and charmonium components
• Form factors of the B-S-transitions in the covariant quark model
• Form factors and branching fraction calculations for $B_s\to D_s^{(\ast )}{\ell }^{+}{\nu }_{\ell }$ in view of LHCb observation
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• Study of baryon octet electromagnetic form factors in perturbative chiral quark model
• Decay $B\to K^{\ast }(\to K\pi ){\ell }^{+}{\ell }^{-}$ in covariant quark model
• Towards an assessment of the ATLAS data on the branching ratio Gamma(Lambda_b(0) -> psi(2S) Lambda(0))/Gamma(Lambda_b(0) -> J/psi Lambda(0))
• Nucleon tensor form factors in a relativistic confined quark model
• Prediction of various observables for $B_s^0\to D_s^{(\ast )-}{\ell }^{+}{\nu }_{\ell }$ within covariant confined quark model
• Study of the nonleptonic decay ${\Xi }_c^0\to {\Lambda }_c^{+}{\pi }^{-}$ in the covariant confined quark model
• Analysis of the nonleptonic two-body decays of the $\Lambda$ hyperon
• Decay $B_c^{+}\to D_{(s)}^{(\ast )+}{\ell }^{+}{\ell }^{-}$ within covariant confined quark model
• Radiative transitions of charmonium states in the covariant confined quark model