Measurement of D0Dˉ0D^0-\bar{D}^0 mixing and search for indirect CP violation using D0KS0π+πD^0\to K_S^0\pi^+\pi^- decays

Collaboration
Apr 9, 2014

Citations per year

20142017202020232024024681012
Abstract: (APS)

We report a measurement of D0-D¯0 mixing parameters and a search for indirect CP violation through a time-dependent amplitude analysis of D0KS0π+π- decays. The results are based on 921fb1 of data accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. Assuming CP conservation, we measure the mixing parameters x=(0.56±0.19-0.09-0.09+0.03+0.06)% and y=(0.30±0.15-0.05-0.06+0.04+0.03)%, 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 arg(q/p)=(-6±11±3-4+3)° are found to be consistent with conservation of CP symmetry in mixing and in the interference between mixing and decay, respectively.

Note:
  • submitted to PRD(RC)
  • 13.25.Ft
  • 11.30.Er
  • 12.15.Ff
  • amplitude analysis: time dependence
  • D0 anti-D0: mixing
  • scattering amplitude: interference
  • BELLE
  • KEK-B
  • electron positron: annihilation
  • D0: hadronic decay