First measurement of the rate K0L → πμνγ
- Bender, M
- Augustin, I
- Holder, M
- Schwarze, I
- Ziolkowski, M
- Fanti, V
- Lai, A
- Musa, L
- Nappi, A
- Setzu, MG
- Moore, R
- Munday, D
- Parker, M
- Takach, S
- White, T
- Barr, G
- Bocquet, G
- Bremer, J
- Ceccucci, A
- Cogan, J
- Cundy, D
- Doble, N
- Fischer, G
- Funk, W
- Gatignon, L
DOIAbstract
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
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