6533b7ddfe1ef96bd127544b

RESEARCH PRODUCT

Observation of the decay KL→π0γγ

Arthur SchafferM. CalvettiA. NappiM. RostKen PeachDaniel FournierH. RohrerR. CarosiN. DobleH.n. NelsonI. HarrusP. MayerJ. Van Der LansR. FantechiC. CerriD.c. CundyP. CalafiuraG. ZechG. QuastR. HeinzL. BertanzaH.g. SanderR. CasaliB. PanzerG. KesselerH. BlümerKonrad KleinknechtM. HolderPh. HeusseA. KreutzW. WeihsA. BigiA. M. LutzLaurent SerinG.m. PierazziniV. GibsonB. RenkLydia Iconomidou-fayardR. WerthenbachL. GatignonP. GrafströmD. CowardR. BlackH. BurkhardtO. PerdereauI. MannelliJ. MuirD. J. CandlinE. AugéG.d. BarrR. HagelbergH. D. Wahl

subject

Nuclear physicsPhysicsNuclear and High Energy PhysicsAngular distributionBranching fractionTheoretical modelsAtomic physics

description

Abstract The decay mode K L → π 0 γγ has been observed with a signal of 21 events and an expected background of 1.5±0.9 events. A branching ratio for decays with invariant γγ masses above 280 MeV of (2.1±0.6)×10 −6 is calculated. This result is compared with the values estimated from theoretical models and has implications for the CP conserving contribution to K L → π 0 e + e − decay.

yearjournalcountryeditionlanguage
1990-06-01
10.1016/0370-2693(90)91806-mhttps://doi.org/10.1016/0370-2693(90)91806-m