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Search for D0−Dˉ0D^0 - \bar{D}^0 mixing and a measurement of the doubly Cabibbo-suppressed decay rate in D0→KπD^0 \to K \pi decays

Collaboration
Apr, 2003
7 pages
Published in:
  • Phys.Rev.Lett. 91 (2003) 171801
e-Print:
DOI:
Report number:
  • SLAC-PUB-9685,
  • BABAR-PUB-03-009
Experiments:
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reference search85 citations

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Abstract:
We present results of a search for D0D^0-Dˉ0\kern 0.2em\bar{\kern -0.2em D}{}^0~mixing and a measurement of RDR_{\rm D}, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, based on an analysis of D0→K+π−D^0 \to K^{+}\pi^{-} decays in 57.1~fb−1{fb}^{-1} of data collected at or just below the Υ(4S)\Upsilon{(4S)} resonance with the {\slshape BABAR} detector at the PEP-II collider. Our results are compatible with no mixing and no CPCP violation. At the 95% C.L., allowing for CP violation, we find the mixing parameters x′2<0.0022{x^{\prime}}^2<0.0022 and −0.056<y′<0.039-0.056<y^{\prime}<0.039, and the mixing rate RM<0.16R_{\rm M} < 0.16%. In the limit of no mixing, RD=(0.357±0.022(stat.)±0.027(syst.))R_{\rm D} = (0.357 \pm 0.022 \hbox{(stat.)} \pm 0.027 \hbox{(syst.)})% and the CPCP~violating asymmetry \mbox{AD=0.095±0.061(stat.)±0.083(syst.)A_{\rm D} = 0.095 \pm 0.061 \hbox{(stat.)} \pm 0.083 \hbox{(syst.)}.}
  • electron positron: colliding beams
  • electron positron: annihilation
  • D*(2010): electroproduction
  • D*(2010): hadronic decay
  • D0: hadronic decay
  • D0 anti-D0: mixing
  • CP: violation
  • upper limit
  • electroweak interaction: validity test
  • BaBar