Measurement of the absolute branching ratios for semileptonic K+/- decays with the KLOE detector
- AMBROSINO, FABIO
- CHIEFARI, GIOVANNI
- MASSAROTTI, PAOLO
- NAPOLITANO, MARCO
- SARACINO, GIULIO
- A. Antonelli
- M. Antonelli
- F. Archilli
- C. Bacci
- P. Beltrame
- G. Bencivenni
- S. Bertolucci
- C. Bini
- C. Bloise
- S. Bocchetta
- F. Bossi
- P. Branchini
- R. Caloi
- P. Campana
- G. Capon
- T. Capussela
- F. Ceradini
- S. Chi
- P. Ciambrone
- E. D. Lucia
- A. D. Santis
- P. D. Simone
- G. D. Zorzi
- A. Denig
- A. D. Domenico
- C. D. Donato
- B. D. Micco
- A. Doria
- M. Dreucci
- G. Felici
- A. Ferrari
- M. L. Ferrer
- S. Fiore
- C. Forti
- P. Franzini
- C. Gatti
- P. Gauzzi
- S. Giovannella
- E. Gorini
- E. Graziani
- W. Kluge
- V. Kulikov
- F. Lacava
- G. Lanfranchi
- J. Lee Franzini
- D. Leone
- M. Martini
- W. Mei
- S. Meola
- S. Miscetti
- M. Moulson
- S. Muller
- F. Murtas
- F. Nguyen
- M. Palutan
- E. Pasqualucci
- A. Passeri
- V. Patera
- F. Perfetto
- M. Primavera
- P. Santangelo
- B. Sciascia
- A. Sciubba
- A. Sibidanov
- T. Spadaro
- M. Testa
- L. Tortora
- P. Valente
- G. Venanzoni
- R. Versaci
- G. Xu
Publication date
January 2008
DOIAbstract
Using a sample of over 600 million phi --> K+ K- decays collected at the DA Phi NE e(+)e(-) collider, we have measured with the KLOE detector the absolute branching ratios for the charged kaon semileptonic decays, K+/- --> pi(0)e(+/-)nu(gamma) and K+/- --> pi(0)mu(+/-)nu(gamma). The results, BR(K-e3) = 0.04965 +/- 0.00038(stat) +/- 0.00037(syst) and BR(K-mu 3) = 0.03233 +/- 0.00029(stat) +/- 0.00026(syst), are inclusive of radiation. Accounting for correlations, we derive the ratio Gamma(K-mu 3)/Gamma(K-e3) = 0.6511 +/- 0.0064. Using the semileptonic form factors measured in the same experiment, we obtain vertical bar V-us f(+)(0)vertical bar = 0.2141 +/- 0.0013
Add to ORKG