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Hadronic weak decays of $\Lambda_c$ in the quark model

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arxiv 2003.09323 v2 pith:7AVCIC5J submitted 2020-03-20 hep-ph hep-ex

classification hep-phhep-ex
keywords lambdadecayshadronicmodelquarksigmaweakamplified
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The hadronic weak decays of $\Lambda_c$ are studied in the framework of a constituent quark model. With the combined analysis of the Cabbibo-favored processes, $\Lambda_c\to \Lambda\pi^+$, $\Sigma^0\pi^+$ and $\Sigma^+\pi^0$, we confirm that the non-factorizable 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 $1\sim 2\%$, 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 $\Lambda_c$, and its overlap with the light quarks in the final state hyperon. Namely, a compact diquark configuration is disfavored.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Cabibbo-favored hadronic weak decays of the $\Xi_c$ in the quark model

    hep-ph 2025-02 conditional novelty 5.0 of 10

    Using direct meson emission, color suppressed, and pole terms in a quark model, the authors reproduce most measured Xi_c decay branching ratios and predict asymmetry parameters, while failing one measured asymmetry sign.

  2. Revisit the diquark of $\Lambda_c$ in the $\Lambda_c\to \Lambda K^+$ and $\Lambda_c\to \Sigma^0 K^+$ processes

    hep-ph 2025-07 conditional novelty 4.0 of 10

    Constituent quark model fits to Λc→ΛK+ and Λc→Σ0K+ branching ratios place the charmed baryon's diquark size parameters in a narrow, non-compact region.

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