Measurements of charged kaon semileptonic decay branching fractions K-+/-->pi(0)mu(+/-)nu and K-+/-->pi(0)e(+/-)nu and their ratio
- J. R., Batley
- C., Lazzeroni
- D. J., Munday
- M. W., Slater
- S. A., Wotton
- R., Arcidiacono
- G., Bocquet
- N., Cabibbo
- A., Ceccucci
- D., Cundy
- V., Falaleev
- M., Fidecaro
- L., Gatignon
- A., Gonidec
- W., Kubischta
- A., Norton
- M., Patel
- A., Peters
- S., Balev
- P. L., Frabetti
- E., Goudzovski
- P., Hristov
- V., Kekelidze
- V., Kozhuharov
- L., Litov
- D., Madigozhin
- E., Marinova
- N., Molokanova
- I., Polenkevich
- Y., Potrebenikov
- S., Stoynev
- A., Zinchenko
- E., Monnier
- E., Swallow
- R., Winston
- P., Rubin
- A., Walker
- W., Baldini
- A. C., Ramusino
- P., Dalpiaz
- C., Damiani
- M., Fiorini
- A., Gianoli
- M., Martini
- F., Petrucci
- M., Savrie
- M., Scarpa
- H., Wahl
- A., Bizzeti
- M., Calvetti
- E., Celeghini
- E., Iacopini
- M., Lenti
- F., Martelli
- G., Ruggiero
- M., Veltri
- M., Behler
- K., Eppard
- K., Kleinknecht
- P., Marouelli
- L., Masetti
- U., Moosbrugger
- C. M., Morales
- B., Renk
- M., Wache
- R., Wanke
- A., Winhart
- D., Coward
- A., Dabrowski
- T. F., Martin
- M., Shieh
- M., Szleper
- M., Velasco
- M. D., Wood
- G., Anzivino
- P., Cenci
- E., Imbergamo
- M., Pepe
- M. C., Petrucci
- M., Piccini
- M., Raggi
- M., Valdata Nappi
- C., Cerri
- Collazuol, Gianmaria
- F., Costantini
- L., Dilella
- N., Doble
- R., Fantechi
- L., Fiorini
- S., Giudici
- G., Lamanna
- I., Mannelli
- A., Michetti
- G., Pierazzini
- M., Sozzi
- B., Bloch Devaux
- C., Cheshkov
- J. B., Cheze
- M. D., Beer
- J., Derre
- G., Marel
- E., Mazzucato
- B., Peyaud
- B., Vallage
- M., Holder
- A., Maier
- M., Ziolkowski
- S., Bifani
- C., Biino
- N., Cartiglia
- M., Clemencic
- S. G., Lopez
- F., Marchetto
- H., Dibon
- M., Jeitler
- M., Markytan
- I., Mikulec
- G., Neuhofer
- L., Widhalm
DOIAbstract
Measured ratios of decay rates for R-Ke3/K2 pi, RK mu 3/K2 pi and R-K mu 3/Ke3 are presented. These measurements are based on K-+/- decays collected in a dedicated run in 2003 by the NA48/2 experiment at CERN. The results obtained are R-Ke3/K2 pi = 0.2496 +/- 0.0009( stat) +/- 0.0004(syst) and R-K mu 3/K2 pi = 0.1637 +/- 0.0006( stat) +/- 0.0003(syst). Using the PDG average for the K-+/-->pi(+/-)pi(0) normalisation mode, both values are found to be larger than the current values given by the particle data book and lead to a larger magnitude of the vertical bar V-us vertical bar CKM element than previously accepted. When combined with the latest particle data book value of vertical bar V-ud vertical bar, the result is in agreement with unita...
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