MEASUREMENT OF THE DECAY-RATE OF THE RADIATIVE K-E3(0) DECAY

Authors
LEBER F BEIER T BLUMER H COWARD D KLEINKNECHT K RENK B SANDER HG SCHEERER F SCHEIDT J STAECK J WAGNER A BARR GD BUCHHOLZ P DOBLE N GATIGNON L GRAFSTROM P HAGELBERG R WAHL H PEACH KJ AUGE E FOURNIER D ICONOMIDOUFAYARD L PERDEREAU O SCHAFFER AC SERIN L CALAFIURA P CAROSI R CASALI R MANNELLI I MARZULLI VM NAPPI A PIERAZZINI GM
Citation
F. Leber et al., MEASUREMENT OF THE DECAY-RATE OF THE RADIATIVE K-E3(0) DECAY, Physics letters. Section B, 369(1), 1996, pp. 69-76
Citations number
12
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
369
Issue
1
Year of publication
1996
Pages
69 - 76
Database
ISI
SICI code
0370-2693(1996)369:1<69:MOTDOT>2.0.ZU;2-A
Abstract
Data from the NA31 experiment at CERN have been used to measure the de cay K-L --> pi(+/-)e(-/+)v gamma (K-e3 gamma(0)). 1384 +/- 53 events o f this decay type have been observed, The decay rate relative to K-e3( 0) is found to be Gamma(K-e3 gamma(0), E(gamma) greater than or equal to 30 MeV, Theta(e-gamma) greater than or equal to 20 degrees)/Gamma (K-e3(0)) = (0.934 +/- 0.036(stat.)(-0.039)(+0.055)(syst.))% which cor responds to a branching ratio of BR(K-e3 gamma(0),E(gamma) greater th an or equal to 30 MeV, Theta(e-gamma) greater than or equal to 20 deg rees) = (0.361 +/- 0.014(stat.)(-0.015)(+0.021)(syst.))%. The result i s in good agreement with theoretical predictions, The decay K-L --> pi (+/-)e(-/+)v gamma is found to be dominated by internal bremsstrahlung .