Search for the decay KL → π0π0γ
Physics Letters B 328:3-4 (1994) 528-534
Abstract:
Data from the NA31 experiment at CERN have been used for a search for the decay mode KL → π0π0γ. After all cuts, three events remain in the signal region with an estimated background of 2.2 ± 0.9 events. The upper limit for the branching ratio of KL → π0π0γ is 5.6 × 10-6 at the 90% confidence level. © 1994.Performance of an electromagnetic liquid krypton calorimeter
Nuclear Inst. and Methods in Physics Research, A 344:3 (1994) 507-520
Abstract:
A prototype electromagnetic calorimeter containing 180 litres of liquid krypton has been tested in electron and muon beams at the CERN SPS. The main features of this detector are its active shower medium, a granularity of 2 cm with tower readout, and the use of the initial current readout technique with an effective shaping time of about 60 ns. An energy resolution for electrons of 4.1% √E[GeV] with a constant term of 0.4% and a noise contribution of 50 MeV has been achieved. The calorimeter has a spatial resolution of 4.5 mm √E[GeV] with a constant term of 0.3 mm and a time resolution of about 0.5 ns for energies larger than 10 GeV. © 1994.A NEW MEASUREMENT OF DIRECT CP VIOLATION IN THE NEUTRAL KAON SYSTEM
317 (1993) 233-242