New measurement of the radiative Ke3 branching ratio and photon spectrum -art. no. 112004

Citation
A. Alavi-harati et al., New measurement of the radiative Ke3 branching ratio and photon spectrum -art. no. 112004, PHYS REV D, 6411(11), 2001, pp. 2004
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6411
Issue
11
Year of publication
2001
Database
ISI
SICI code
0556-2821(200112)6411:11<2004:NMOTRK>2.0.ZU;2-Z
Abstract
We present a new measurement of the branching ratio of the decay K-L-->pi ( +/-) e(-/+) nu (e)gamma (K-e3 gamma) with respect to K-L-->pi (-/+) e(-/+) nu (e) (K(e)3), and the first study of the photon energy spectrum in this d ecay. We find BR (K-e3 gamma,E-gamma* > 30 MeV, theta (e gamma)* > 20 degre es)/BR (K-e3) = 0.908+/-0.008(stat)(-0.012)(+0.013)(syst)%. Our measurement of the spectrum is consistent with inner bremsstrahlung as the only source of photons in K-e3 gamma.