Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors

Abstract

Based on QCD conformal partial wave expansion to leading order conformal spin accuracy, we present the light-cone distribution amplitudes (DAs) of $\Sigma$ and $\Lambda$ baryons up to twist 6. It is concluded that fourteen ndependent DAs are needed to describe the valence three-quark states of the baryons at small transverse separations. The nonperturbative parameters relevant to the DAs are determined within the framework of QCD sum rule method. With the obtained DAs, a simple investigation on the electromagnetic form factors of these baryons are given. The magnetic moments of the baryons are estimated by fitting the magnetic form factor with the dipole formula.

40 pages, 19 figures

References in corpus (3)

• Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
• Nucleon Form Factors in QCD
• Deep Inelastic Pion Electroproduction at Threshold

Cited by in corpus (22)

• ${\Lambda }_b\to p,\Lambda$ transition form factors from QCD light-cone sum rules
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• Light-cone Distribution Amplitudes of Xi and their Applications
• Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach
• Isovector axial-vector form factors of octet baryons in QCD
• Lightcone and quasi distribution amplitudes for light octet and decuplet baryons
• The exclusive rare decay b->s gamma of heavy b-Baryons
• Probing $R$-parity violation in $B$-meson decays to a baryon and a light neutralino
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Estimates of exchange topological contributions and $CP$-violating observables in ${\Lambda }_b\to \Lambda \varphi$ decay
• Charmonium decays of beauty baryons in the perturbative QCD approach
• Semileptonic ${\Xi }_c$ baryon decays in the light cone QCD sum rules
• Tensor form factors of the octet hyperons in QCD
• Mixing effects of $\eta -{\eta }^{\prime }$ in ${\Lambda }_b\to \Lambda {\eta }^{{(}^{\prime })}$ decays
• Isovector Axial Vector Form Factors of Octet-Decuplet Hyperon Transition in QCD
• Octet negative parity to octet positive parity electromagnetic transitions in light cone QCD
• Semileptonic Decay of ${\Xi }_c\to \Xi {\ell }^{+}{\nu }_{\ell }$ From Light-Cone QCD Sum Rules
• Perturbative QCD Prediction of the Hyperon EDM from CP-violating Dipole Interactions
• Estimates of the isospin-violating ${\Lambda }_b\to {\Sigma }^0\varphi ,{\Sigma }^{0}J/\psi$ decays and the $\Sigma -\Lambda$ mixing
• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state
• Semileptonic decay of double strangeness heavy flavor baryons
• Light-cone distribution amplitudes of the nucleon and $\Delta$ baryon