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Enhanced charm CP asymmetries from final state interactions

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arxiv 2203.04056 v3 pith:X3AJR3JD submitted 2022-03-08 hep-ph hep-ex

Ignacio Bediaga , Tobias Frederico , Patricia C Magalhães This is my paper · ORCID
classification hep-phhep-ex
keywords differenceexperimentalfinalinteractionsstatevalueasymmetriesbranching
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We show that final state interactions (FSI) within a CPT invariant two-channel framework can enhance the charge-parity (CP) violation difference between $D^0\to\pi^-\pi^+$ and $D^0\to K^-K^+$ decays up to the current experimental value. This result relies upon: (i) the dominant tree level diagram, (ii) the well-known experimental values for the $D^ 0\to\pi^-\pi^+$ and $D^ 0\to K^-K^+$ branching ratios, and (iii) the $\pi\pi \to \pi\pi$ and $\pi\pi \to K K $ scattering data to extract the strong phase difference and inelasticity. Based on well-grounded theoretical properties, we find the sign and bulk value of the $\Delta A_{CP}$ and $A_{CP}(D^0 \to \pi^-\pi^+)$ recently observed by the LHCb Collaboration.

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Cited by 4 Pith papers

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

  1. Measurement of the CP asymmetry in $D^+ \to \pi^+ \pi^0$ decays at Belle II

    hep-ex 2025-06 accept novelty 5.0 of 10

    The new world-best measurement of the CP asymmetry in D+ -> pi+ pi0 decays is (-1.8 +/- 0.9 +/- 0.1)%, consistent with zero and with the Standard Model.

  2. Implications on CP violation of charmless three body decays of bottom baryon from the U-spin analysis

    hep-ph 2024-11 conditional novelty 5.0 of 10

    U-spin symmetry converts recent LHCb CP-violation measurements in Lambda_b charmless three-body decays into CP-asymmetry predictions for Xi_b^0 and Sigma^0 channels, plus a null test for the Standard Model.

  3. CP violation observables in baryon decays

    hep-ph 2024-11 accept novelty 5.0 of 10

    Time-reversal-odd CP observables in baryon decays are proportional to the cosine of strong-phase differences, so they complement sine-suppressed direct CP asymmetries.

  4. Unquenched Charmonium and Beyond

    hep-ph 2026-02 conditional novelty 2.0 of 10

    This Lanzhou-group review argues that coupled-channel (unquenched) effects, not exotic constituents, are the common thread explaining charmonium anomalies from the rho-pi puzzle to the Y-problem states.

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