Journal Article/Internal Report DESY-2014-02872

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Measurement of $\it{D^{0}}$-$\it{\overline{D}{}^{0}}$ Mixing and Search for Indirect $\it{CP}$ Violation Using $\it{{D^0\to K_S^0\pi^+\pi^-}}$ Decays

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2014
American Physical Society [S.l.]

Physical review / D 89(9), 091103 () [10.1103/PhysRevD.89.091103]
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Report No.: BELLE-PREPRINT-2014-6; arXiv:1404.2412

Abstract: We report a measurement of ${D}^{0}\text{-}{\overline{D}}^{0}$ mixing parameters and a search for indirect $CP$ violation through a time-dependent amplitude analysis of ${D}^{0}\to {K}_{S}^{0}{\pi }^{+}{\pi }^{-}$ decays. The results are based on $921\text{}\text{}{\mathrm{fb}}^{-1}$ of data accumulated with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{-}$ collider. Assuming $CP$ conservation, we measure the mixing parameters $x=\left(0.56±{0.19}_{-0.09-0.09}^{+0.03+0.06}\right)%$ and $y=\left(0.30±\phantom{\rule{0ex}{0ex}}{0.15}_{-0.05-0.06}^{+0.04+0.03}\right)%$, where the errors are statistical, experimental systematic, and systematic due to the amplitude model, respectively. With $CP$ violation allowed, the parameters $|q/p|={0.90}_{-0.15-0.04-0.05}^{+0.16+0.05+0.06}$ and $\mathrm{arg}\left(q/p\right)=\left(-6±11±{3}_{-4}^{+3}\right)°$ are found to be consistent with conservation of $CP$ symmetry in mixing and in the interference between mixing and decay, respectively.

Keyword(s): amplitude analysis: time dependence ; D0 anti-D0: mixing ; scattering amplitude: interference ; BELLE ; KEK-B ; electron positron: annihilation ; D0: hadronic decay ; CP: violation ; experimental results ; D0 --> K0(S) pi+ pi- ; approx. 10.57: 10.87 GeV-cms

Classification:

Contributing Institute(s):
  1. beauftragt von FH1 (Belle)
Research Program(s):
  1. Experiments at KEK (BELLE I/II) (POF2-515) (POF2-515)
Experiment(s):
  1. KEK: BELLE I/II

Appears in the scientific report 2014
Database coverage:
Medline ; American Physical Society Transfer of Copyright Agreement ; OpenAccess ; Current Contents - Social and Behavioral Sciences ; JCR ; NationallizenzNationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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 Record created 2014-06-17, last modified 2025-07-17


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