MEASUREMENT OF THE PI(-]E(+)NU BRANCHING RATIO())

Authors
BRITTON DI AHMAD S BRYMAN DA BURNHAM RA CLIFFORD ETH KITCHING P KUNO Y MACDONALD JA NUMAO T OLIN A POUTISSOU JM DIXIT MS
Citation
Di. Britton et al., MEASUREMENT OF THE PI(-]E(+)NU BRANCHING RATIO()), Physical review. D. Particles and fields, 49(1), 1994, pp. 28-39
Citations number
47
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
49
Issue
1
Year of publication
1994
Pages
28 - 39
Database
ISI
SICI code
0556-2821(1994)49:1<28:MOTPBR>2.0.ZU;2-W
Abstract
A measurement of the pi+ --> e+nu branching ratio gives R(pienu) = GAM MA(pi --> enu + pi --> enugamma)/GAMMA(pi --> munu + pi --> munugamma) = 1.2265 +/- 0.0034(stat) +/- (0.0044(sys) x 10(-4). This result is i n agreement with standard model calculations and confirms the hypothes is of electron-muon universality at the 0.2% level.