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Estimates of W-exchange contributions to $\Xi_{cc}$ decays

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arxiv 1709.08217 v2 pith:66VSESY5 submitted 2017-09-24 hep-ph

classification hep-ph
keywords contributionsdecaysw-exchangeestimatesmodelpoleapproachbaryon
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abstract

Encouraged by recent discovery of $\Xi_{cc}^{++}$ baryon, we investigate two body non-leptonic weak decays of doubly charmed, $\Xi_{cc}$, baryons. We calculate the branching ratios for CKM-favored and suppressed modes in factorization and pole model approach. We give the first estimates of nonfactorizable W-exchange contributions using pole model. We find that W-exchange contributions to $\Xi_{cc}$ decays being sizable can not be ignored.

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  1. The effects of polarization on the observables in the decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \bar{\ell}\nu_{\ell}$

    hep-ph 2026-03 accept novelty 5.5 of 10

    Polarization of the parent baryon, daughter baryon, and muon strongly reshapes branching ratios, forward-backward asymmetries, and newly defined polarization ratios in Ξ_cc++ → Ξ_c+ ℓ ν, while the μ/e LFU ratio stays ...

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