A search for the decay KS→π0μ+μ- 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 0.22-0.11+0.18 events. Using a vector matrix element and unit form factor, the measured branching ratio is B(KS→π0μ+μ-)=[2.9-1. 2+1.5(stat)±0.2(syst)]×10-9.
Observation of the rare decay K(S) ---> pi0 mu+ mu-
ANZIVINO, Giuseppina;NAPPI, Aniello;VALDATA, Marisa
2004
Abstract
A search for the decay KS→π0μ+μ- 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 0.22-0.11+0.18 events. Using a vector matrix element and unit form factor, the measured branching ratio is B(KS→π0μ+μ-)=[2.9-1. 2+1.5(stat)±0.2(syst)]×10-9.File in questo prodotto:
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