Nonleptonic two-body weak decays of charmed baryons

2023/08/15 by Liu, Chia-Wei · 2 citations
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2308.07754

Abstract

We analyze the two-body nonleptonic weak decays of charmed baryons, employing the pole approximation in tandem with the SU(3)_F symmetry. We are able to make novel predictions for decay channels of Ω_c⁰ → \bf B_n P and \bf B_cc→ \bf B_c^A,S P based on the experimental data of \bf B_c^A → \bf B_n P. Here, \bf B_n, \bf B_c^A, \bf B_c^S and \bf B_cc are the low-lying octet, antitriplet charmed, sextet charmed and doubly charmed baryons, respectively, and P is the pseudoscalar meson. Our findings reveal that the fitted effective Wilson coefficient \cal C₊=0.469 is notably smaller than the naive expectation, and the low-lying pole approximation fails to account for \cal B(Λ_c⁺ → n π⁺ , Ξ⁰ K⁺), despite consistencies with the soft-meson limit. We further recommend the decay channel Ξ_cc⁺ → Ξ_c⁰ π⁺ → Ξ^- π⁺π⁺π⁺π^- for exploring evidence of Ξ_cc⁺, estimating the branching fraction at (1.1± 0.6)× 10^-3.

Cited by

• Semileptonic and nonleptonic weak decays of bottom baryons Ω^(*)_b
• The Production and Decay Dynamics of the Charmed Baryon Λ_c⁺ in e⁺e^- Annihilations near Threshold

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