The decay rate of K-S -> pi ev relative to the rate of K-L -> pi rev has been measured by the NA48 Collaboration in a neutral kaon beam originating from 400 GeV proton-Be interactions at the CERN SPS. The result is 0.993 +/- 0.026(stat) +/- 0.022(syst), compatible with I in agreement with the Standard Model prediction at tree level. It implies B R (K-S -> pi ev) = (7.05 +/- 0.18(stat) +/- 0.16(syst)) X 10(-4). (c) 2007 Elsevier B.V. All rights reserved.
Determination of the relative decay rate K-S ->pi e nu/K-L ->pi e nu
COLLAZUOL, GIANMARIA;
2007
Abstract
The decay rate of K-S -> pi ev relative to the rate of K-L -> pi rev has been measured by the NA48 Collaboration in a neutral kaon beam originating from 400 GeV proton-Be interactions at the CERN SPS. The result is 0.993 +/- 0.026(stat) +/- 0.022(syst), compatible with I in agreement with the Standard Model prediction at tree level. It implies B R (K-S -> pi ev) = (7.05 +/- 0.18(stat) +/- 0.16(syst)) X 10(-4). (c) 2007 Elsevier B.V. All rights reserved.File in questo prodotto:
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NA48-Ks_to_Kl_semileptonic_ratio.pdf
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