Measurement of the decay KL → e+e-γγ
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 420:1-2 (1998) 205-210
Abstract:
The full data set of the NA31 experiment at CERN has been used to analyse the decay mode KOL → e+ e-γγ. A signal of 47 events has been observed with an estimated background of 6.9 events. The total number of kaon decays in the decay volume was determined to be (2.1 ± 0.1stat) · 109. This corresponds to a branching ratio of (8.0 ± 1.5+1.4-1.2)· 10-7. © 1998 Published by Elsevier Science B.V.First measurement of the rate K0L → πμνγ
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 418:3-4 (1998) 411-418
Abstract:
In a preliminary version of the NA48 experiment at the CERN SPS, in which an iron-scintillator sandwich calorimeter was used as a photon detector, the ratio of KL → πμνγ and KL → πμν decays was measured. The branching ratio BR(KL → πμνγ,E*γ ≥30 MeV)/(KL → πμν) is found to be (2.08 ± 0.17+0.16-0.21) × 10-3, where the first error is statistical and the second systematic. The result is in agreement with theoretical predictions. © 1998 Elsevier Science B.V.First measurement of the rate K-L(0)->pi mu nu gamma
418 (1998) 411-418
Measurement of the decay K-L -> e(+)e(-)gamma gamma
420 (1998) 205-210
Measurement of the decay rate and the parameter αK* of the decay KL → μμγ
Zeitschrift fur Physik C-Particles and Fields 76:4 (1997) 653-657