Hadronic weak decays of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math> in the quark model

2020/10/16 by Peng-Yu Niu, Jean-Marc Richard, Qian Wang +2 · 5 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research

paper · pdf · doi:10.1103/physrevd.102.073005

Abstract

The hadronic weak decays of \mathrm\ensuremathΛ_c are studied in the framework of a constituent quark model. With the combined analysis of the Cabbibo-favored processes, \mathrm\ensuremathΛ_c\ensuremath→\mathrm\ensuremathΛ\ensuremathπ⁺, \mathrm\ensuremathΣ⁰\ensuremathπ⁺, and \mathrm\ensuremathΣ⁺\ensuremathπ⁰, we confirm that the nonfactorizable transition mechanisms play a crucial role in the understanding of their compatible branching ratios. We emphasize that the SU(3) flavor symmetry breaking effects, which is generally at the order of 1--2%, can be amplified by the destructive interferences among the pole terms in the diagrams with internal conversion. Some contributions are sensitive to the spatial distribution of the scalar-isoscalar light-quark sector in the \mathrm\ensuremathΛ_c, and its overlap with the light quarks in the final state hyperon. Namely, a compact diquark configuration is disfavored.

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• Singly Cabibbo-suppressed hadronic weak decays of the Ω^- hyperon
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• Production of excited Λ_c⁺ baryons through Λ_b hadronic weak decays

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