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arXiv · 1612.06084

Electromagnetic form factors of $\Lambda_b$ in the Bethe-Salpeter equation approach

Liang-Liang Liu·Chao Wang·Ying Liu·Xin-Heng Guo
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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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Liang-Liang Liu, Chao Wang, Ying Liu, Xin-Heng Guo. 2016-12-19. Electromagnetic form factors of $\Lambda_b$ in the Bethe-Salpeter equation approach. https://doi.org/10.1103/physrevd.95.054001

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