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11 April 2006 - KPM meeting

11 April 2006 - KPM meeting. Election night…. 11 April 2006 - KPM meeting. Status of K  semileptonic BR measurement f NI : kaon nuclear interaction measured directly on data Tracking efficiency correction: dependency on lepton momentum. Signal selection: fit, selection cuts. f NI.

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11 April 2006 - KPM meeting

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  1. 11 April 2006 - KPM meeting Election night…

  2. 11 April 2006 - KPM meeting • Status of K semileptonic BR measurement • fNI: kaon nuclear interaction measured directly on data • Tracking efficiency correction: dependency on lepton momentum. • Signal selection: fit, selection cuts

  3. fNI

  4. fNI

  5. fNI

  6. + + fNI

  7. fNI Correction due to kaon nuclear interaction measured directly on data

  8. Tracking efficiency correction Dependency on lepton momentum: high values (>140 MeV) From Kp2 events. Binning: rVTX, qK and pLEPT.

  9. Tracking efficiency correction Dependency on lepton momentum: low values (<140 MeV) From Kt’ events. Binning: rVTX, qK and pLEPT. Tag(Km2)

  10. Conclusions Signal selection: Fit stability  Done Kinematical selection cuts Ready fNI: kaon nuclear interaction measured directly on data Ready Tracking efficiency correction: dependency on lepton momentum.  “Running” BR, hopefully, in few days…

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