A search for the decay K_S --> pi0 mu+ mu- has been made by the NA48/1 Collaboration at the CERN SPS accelerator. The data were collected during 2002 with a high-intensity KS beam. Six events were found with a background expectation of 0.22 +0.18 -0.11 events. Using a vector matrix element and unit form factor, the measured branching ratio is B(K_S --> pi0 mu+ mu-) = [2.9 +1.5-1.2(stat) +-0.2(syst)]*10^-9.
Observation of the rare decay K_S --> pi0 mu+ mu-
BALDINI, Wander;DALPIAZ, Pietro;GIANOLI, Alberto;MARTINI, Mara;PETRUCCI, Ferruccio Carlo;SCARPA, MARCELLA;SAVRIE', Mauro;
2004
Abstract
A search for the decay K_S --> pi0 mu+ mu- has been made by the NA48/1 Collaboration at the CERN SPS accelerator. The data were collected during 2002 with a high-intensity KS beam. Six events were found with a background expectation of 0.22 +0.18 -0.11 events. Using a vector matrix element and unit form factor, the measured branching ratio is B(K_S --> pi0 mu+ mu-) = [2.9 +1.5-1.2(stat) +-0.2(syst)]*10^-9.File in questo prodotto:
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