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Limits on D0Dˉ0D^0 \bar{D}^0 mixing and CP violation from the ratio of lifetimes for decay to K−π+K^- \pi^+, K−K+K^- K^+ and π−π+\pi^- \pi^+

Collaboration
Jun, 2003
7 pages
Published in:
  • Phys.Rev.Lett. 91 (2003) 121801
e-Print:
DOI:
PDG: AΓ_{\Gamma }
Report number:
  • SLAC-PUB-9888,
  • BABAR-PUB-03-014
Experiments:
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Abstract:
We present a measurement of D0D^0-\D0bar mixing parameters using the ratios of lifetimes extracted from samples of D0D^0 mesons decaying to K−π+K^-\pi^+, K−K+K^-K^+, and π−π+\pi^-\pi^+. Using 91 fb−1{\rm fb}^{-1} of data collected by the BaBar detector at the PEP-II asymmetric-energy BB Factory, we obtain a value Y=(0.8±0.4(stat.)−0.4+0.5(syst.))Y = (0.8 \pm 0.4 ({\rm stat.}) {}^{+0.5}_{-0.4} ({\rm syst.}))%, which, in the limit of CP conservation, corresponds to the mixing parameter y=ΔΓ/2Γy = \Delta\Gamma/2\Gamma. Using the difference in lifetimes of D0D^0 and \D0bar mesons, we obtain the CP-violation parameter ΔY=(−0.8±0.6(stat.)±0.2(syst.))\Delta Y = (-0.8 \pm 0.6 ({\rm stat.}) \pm 0.2 ({\rm syst.}))%.
  • electron positron: colliding beams
  • electron positron: annihilation
  • quark: charm
  • quark: pair production
  • D*(2010): hadronic decay
  • D0: hadronic decay
  • final state: two-particle
  • D0 anti-D0: mixing
  • parametrization
  • lifetime: ratio