Weak Decays of Doubly Heavy Baryons: SU(3) Analysis

2017/07/31 by Wei Wang, Zhi-Peng Xing, Ji Xu · 2 citations
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf · doi:10.1140/epjc/s10052-017-5363-y

published as Eur. Phys. J. C (2017) 77: 800 · 28 pages, 12 figures, 22 tables

arxiv created 2017/11/04 · arxiv updated 2017/11/28

Abstract

Motivated by the recent LHCb observation of doubly-charmed baryon Ξ_cc⁺⁺ in the Λ_c⁺ K^-π⁺π⁺ final state, we analyze the weak decays of doubly heavy baryons Ξ_cc, Ω_cc, Ξ_bc, Ω_bc, Ξ_bb and Ω_bb under the flavor SU(3) symmetry. Decay amplitudes for various semileptonic and nonleptonic decays are parametrized in terms of a few SU(3) irreducible amplitudes. We find a number of relations or sum rules between decay widths and CP asymmetries, which can be examined in future measurements at experimental facilities like LHC, Belle II and CEPC. Moreover once a few decay branching fractions are measured in future, some of these relations may provide hints for exploration of new decay modes.

Cited by

• Weak Decays of Doubly Heavy Baryons: Multi-body Decay Channels
• Semileptonic decays of doubly charmed or bottom baryons to single heavy baryons

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• Semileptonic decays of doubly charmed or bottom baryons to single heavy baryons