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Search for CP Violation in the Decays D0→KS0P0D^0\rightarrow K^0_S P^0

Collaboration
Jan, 2011
6 pages
Published in:
  • Phys.Rev.Lett. 106 (2011) 211801
e-Print:
DOI:
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reference search24 citations

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Abstract: (arXiv)
We have searched for CP violation in the decays D0→KS0P0D^0\rightarrow K^0_S P^0 where P0P^0 denotes a neutral pseudo-scalar meson which is either a π0\pi^0, η\eta, or η′\eta' using KEKB asymmetric-energy e+e−e^+e^- collision data corresponding to an integrated luminosity of 791 fb−1^{-1} collected with the Belle detector. No evidence of significant CP violation is observed. We report the most precise CP asymmetry measurement in the decay D0→KS0π0D^0\rightarrow K^0_S\pi^0 to date: ACPD0→KS0π0=(−0.28±0.19±0.10)A_{CP}^{D^0\rightarrow K^0_S\pi^0}=(-0.28\pm0.19\pm0.10)%. We also report the first measurements of CP asymmetries in the decays D0→KS0ηD^0\rightarrow K^0_S\eta and D0→KS0η′D^0\rightarrow K^0_S\eta': ACPD0→KS0η=(+0.54±0.51±0.16)A_{CP}^{D^0\rightarrow K^0_S\eta}=(+0.54\pm0.51\pm0.16)% and ACPD0→KS0η′=(+0.98±0.67±0.14)A_{CP}^{D^0\rightarrow K^0_S\eta'}=(+0.98\pm0.67\pm0.14)%, respectively.
  • 11.30.Er
  • 13.25.Ft
  • 14.40.Lb
  • CP: violation
  • asymmetry: CP
  • D0: hadronic decay
  • eta(958)
  • BELLE
  • KEK-B
  • electron positron: annihilation