MEASUREMENT OF BRANCHING RATIO (D0 ---] K- PI+) USING PARTIAL RECONSTRUCTION OF ANTI-B ---] D*+ X LEPTON- ANTI-NEUTRINO. PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
We present a measurement of the absolute branching fraction for D° → K−? using the reconstruction of the decay chain {bar B} → D*+Xl−{bar {nu}}, D*+ → D°?+ where only the lepton and the low-momentum pion from the D*+ are detected. With data collected by the CLEO II detector at the Cornell Electron Storage Ring, we have determined Br(D° → K−?+) = [3.81 ± 0.15(stat.) ± 0.16(syst.)]%.
Author: Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
We present a measurement of the absolute branching fraction for D° → K−? using the reconstruction of the decay chain {bar B} → D*+Xl−{bar {nu}}, D*+ → D°?+ where only the lepton and the low-momentum pion from the D*+ are detected. With data collected by the CLEO II detector at the Cornell Electron Storage Ring, we have determined Br(D° → K−?+) = [3.81 ± 0.15(stat.) ± 0.16(syst.)]%.
Author: Hung-Chung Fang Publisher: ISBN: Category : Languages : en Pages : 324
Book Description
Using 1.3 fb-̂1 of data from p-pbar collisions at sqrt{s}=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, we have measured the relative branching ratio BR(B-̂ -> D0̂ K-̂)/BR(B-̂ -> D0̂ pi-̂) and its charge conjugate in the D0̂ flavor decay mode D0̂_f -> K-̂pi+̂ and the CP-even decay modes D0̂ -> K-̂K+̂ and D0̂ -> pi-̂pi+̂. From these measurements, we derive: R = (7.99 +- 0.33(stat.) +- 0.38(sys.)) %, R_{CP+} = 1.15 +- 0.17(stat.) +- 0.02(sys.), A_{CP+} = 0.10 +- 0.15(stat.) +- 0.02(sys.). These values are consistent with Standard Model expectations.
Author: Publisher: ISBN: Category : Languages : en Pages : 7
Book Description
The authors present a measurement of R{sub B}, the ratio of the branching fraction for the rare decay D° → K?− to that for the Cabibbo-favored decay D° → K−?+. Charge conjugate decays are implicitly included. A signal of 2005 ± 104 events for the decay D° → K+?− 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 {bar p}p collisions at √s = 1.96 TeV. Assuming no mixing, they find R{sub B} = [4.05 ± 0.21(stat) ± 0.11(syst)] x 10−3. This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments.
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