The decays ${\Xi }_b\to {\Lambda }_b\pi$ and diquark correlations in hyperons

Abstract

The decays ${\Xi }_b\to {\Lambda }_b\pi$ are strangeness changing weak transitions involving only the light diquark in the baryon. Thus these decays can test the properties of such diquarks, in particular the suggestions existing in the literature of enhanced correlations in $J^P=0^{+}$ light diquarks. We revisit the estimates of the rates of these decays and point out that with the enhanced correlation their branching fraction can reach a few percent and may become visible in the measurements of differences of the lifetimes of $b$ baryons.

arXiv comment8 pages

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Cited by in corpus (11)

• Charmed Baryon Physics Circa 2021
• Evidence for the strangeness-changing weak decay ${\Xi }_b^{-}\to {\Lambda }_b^0{\pi }^{-}$
• Light-Quark Decays in Heavy Hadrons
• Topological tensor invariants and the current algebra approach: Analysis of 196 nonleptonic two-body decays of single and double charm baryons -- a review
• Heavy-Flavor-Conserving Hadronic Weak Decays of Charmed and Bottom Baryons
• Charmonium decays of beauty baryons in the perturbative QCD approach
• From ${\Xi }_b\to {\Lambda }_b\pi$ to ${\Xi }_c\to {\Lambda }_c\pi$
• S-wave nonleptonic hyperon decays and ${\Xi }_b^{-}\to {\pi }^{-}{\Lambda }_b$
• Update on splitting of lifetimes of $c$ and $b$ hyperons within the heavy quark expansion and decays ${\Xi }_Q\to {\Lambda }_Q\pi$
• Observation and branching fraction measurement of the decay ${\Xi }_b^{-}\to {\Lambda }_b^0{\pi }^{-}$
• Precision measurement of the ${\Xi }_b^0$ baryon lifetime