Electromagnetic form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach

Abstract

The heavy baryon ${\Lambda }_b$ is regarded as composed of a heavy quark and a scalar diquark which has good spin and isospin quantum numbers. In this picture, we calculate the electromagnetic (EM) form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach. We find that the shapes of the EM form factors of ${\Lambda }_b$ are similar to those of $\Lambda$, which have a peak at about $\omega =1$, but the amplitudes are much smaller than those of $\Lambda$.

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• Electromagnetic form factors of singly heavy baryons in the self-consistent SU(3) chiral quark-soliton model
• Masses of doubly heavy baryons in the Bethe-Salpeter equation approach
• The mass spectra and wave functions for the doubly heavy baryons with $J^P=1^{+}$ heavy diquark core
• Possible open-charmed pentaquark molecule ${\Omega }_c(3188)$ --- the $D\Xi$ bound state --- in the Bethe-Salpeter formalism
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• FCNC transitions of ${\Lambda }_b$ to neutron in Bethe-Salpeter equation approach
• Studying the bound state of the $K^{-}p$ system in the Bethe-Salpeter formalism
• Rare ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ decay in the Bethe-Salpeter equation approach
• Mass spectra, wave functions and mixing effects of the $(bcq)$ baryon
• Electromagnetic form factors of ${\Lambda }_c$ in the Bethe-Salpeter equation approach
• Forward-backward asymmetries in ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ in Bethe-Salpeter equation approach
• Residues of ${\Lambda }_Q$-type and ${\Sigma }_Q$-type Baryons in the Bethe-Salpeter Equation Approach