We present a measurement of RB, the ratio of the branching fraction for the rare decay D(0)-> K(+)pi(-) to that for the Cabibbo-favored decay D(0)-> K(-)pi(+). Charge-conjugate decays are implicitly included. A signal of 2005 +/- 104 events for the decay D(0)-> K(+)pi(-) is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb(-1) produced in (p) over barp collisions at root s>=1.96 TeV. Assuming no mixing, we find R(E)=[4.05 +/- 0.21(stat)+/- 0.11(syst)]x10(-3). This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments. RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012
Measurement of the ratio of branching fractions B(D(0)-> K(+)pi(-))/B(D(0)-> K(-)pi(+)) using the CDF II detector
MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;
2006-01-01
Abstract
We present a measurement of RB, the ratio of the branching fraction for the rare decay D(0)-> K(+)pi(-) to that for the Cabibbo-favored decay D(0)-> K(-)pi(+). Charge-conjugate decays are implicitly included. A signal of 2005 +/- 104 events for the decay D(0)-> K(+)pi(-) is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb(-1) produced in (p) over barp collisions at root s>=1.96 TeV. Assuming no mixing, we find R(E)=[4.05 +/- 0.21(stat)+/- 0.11(syst)]x10(-3). This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments. RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012
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