Topological amplitudes of bottom baryon decays in the SU(3)_F limit

2025/03/28 by Wang, Di, Fu, Wei-Chen · 3 citations
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2503.22170

Abstract

Motivated by the first observation of CP violation in baryon decays, we study the topological amplitudes of bottom baryon decays in the SU(3)_F limit. The topological diagrams of the charmless two-body decays of bottom baryons are presented in detail. The linear relations between topologies and SU(3) irreducible amplitudes are derived through tensor contraction and SU(3) decomposition. Four amplitudes among the 13 independent amplitudes are critical to the CP asymmetries. The small CP asymmetries might indicate small relative strong phases between amplitudes A₂ and A_12,14^′. To avoid them, we suggest measuring CP asymmetries in the Ξ⁰_b→ pK^- and Ξ^-_b→ Λ⁰ K^- decays. Furthermore, the Körner-Pati-Woo theorem can be tested by measuring the branching fractions of the Λ_b⁰→Σ⁰K⁰_S and Λ_b⁰→Σ^-K⁺ modes.

Cited by

• Topological diagrams of doubly charmed baryon decays in the SU(3)_F limit
• Predictions for CP violation in anti-triplet beauty baryon to charmonium decays
• U-spin sum rules for two-body decays of bottom baryons

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