Analysis of D0 -> K+ pi- pi0 Decays: Search for D0-D0bar Mixing, and Measurements of the Doubly Cabibbo-Suppressed Decay Rate and Resonance Contributions Page: 66 of 187
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the right-sign combination is selected, as its prior probability is two orders of
magnitude higher. Approximately 7% of wrong-sign events exhibit this.
This selection, though not used, was studied to determine its potential bias on the
doubly Cabibbo-suppressed (DCS) D0 -> K+rr0 branching ratio measurement. It
was found that 0.5% of DCS signal events are eliminated, but 10% of background
events due to Cabibbo-favored D0 -> K-r+7 decays with an uncorrelated 7rs are
also removed. If the mixing portion of this analysis is repeated in the future, it is
recommended that this selection be included. Since this work includes explicitly a
branching ratio measurement, this technique was omitted for clarity.
As with the skim, the reskim efficiency is estimated using cc-continuum Monte
Carlo and is listed in Table 4.4. Combining the efficiencies for the skim and the
reskim, the estimated overall signal efficiency for the event selection is
EskimEreskim = 6.26% 0.03%. (4.1)49
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Wilson, Michael Galante. Analysis of D0 -> K+ pi- pi0 Decays: Search for D0-D0bar Mixing, and Measurements of the Doubly Cabibbo-Suppressed Decay Rate and Resonance Contributions, report, December 13, 2005; [Menlo Park, California]. (https://digital.library.unt.edu/ark:/67531/metadc878913/m1/66/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.