Search for D0D0bar Mixing and a Measurement of the Doubly Cabibbo-suppressed Decay Rate in D0 -> K pi Decays

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dc.creatorThe BABAR Collaboration
dc.creatorAubert, B.
dc.date2003-04-04
dc.date.accessioned2026-07-07T12:01:57Z
dc.date.available2026-07-07T12:01:57Z
dc.descriptionWe present results of a search for $D^0$-$\kern 0.2em\bar{\kern -0.2em D}{}^0$~mixing and a measurement of $R_{\rm D}$, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, based on an analysis of $D^0 \to K^{+}π^{-}$ decays in 57.1~${fb}^{-1}$ of data collected at or just below the $Υ{(4S)}$ resonance with the {\slshape BABAR} detector at the PEP-II collider. Our results are compatible with no mixing and no $CP$ violation. At the 95% C.L., allowing for CP violation, we find the mixing parameters ${x^{\prime}}^2<0.0022$ and $-0.056<y^{\prime}<0.039$, and the mixing rate $R_{\rm M} < 0.16%$. In the limit of no mixing, $R_{\rm D} = (0.357 \pm 0.022 \hbox{(stat.)} \pm 0.027 \hbox{(syst.)})%$ and the $CP$~violating asymmetry \mbox{$A_{\rm D} = 0.095 \pm 0.061 \hbox{(stat.)} \pm 0.083 \hbox{(syst.)}$.}
dc.description7 pages, 3 postscript figures, submitted to Physical Review Letters
dc.identifierhttps://arxiv.org/abs/hep-ex/0304007
dc.identifierhttp://arxiv.org/abs/hep-ex/0304007
dc.identifierPhys.Rev.Lett.91:171801,2003
dc.identifierdoi:10.1103/PhysRevLett.91.171801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207272
dc.subjectHigh Energy Physics - Experiment
dc.titleSearch for D0D0bar Mixing and a Measurement of the Doubly Cabibbo-suppressed Decay Rate in D0 -> K pi Decays
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