The rate of the decay of K_L(0) --> mu mu gamma has been measured with the NA48 detector at the CERN SPS. A total of 59 events has been observed with an estimated background of 14 events. The overall Kaon flux was determined to be 1.2 x 10^(9). This observation corresponds to a branching ratio of (3.4 +/- 0.6(stat) +/- 0.4(sys)) x 10^(-7). Using this branching ratio the parameter alpha(K*) describing the relative strength of the two contributing amplitudes to this decay, through intermediate pseudoscalar or vectorlike mesons, was measured to be alpha_(K*) = -0.04(-0.21)(+0.24).
Measurement of the decay rate and the parameter $alpha_{K}^{ast}$ of the decay K $_{L} ightarrow mu mu gamma$
ANZIVINO, Giuseppina
1997
Abstract
The rate of the decay of K_L(0) --> mu mu gamma has been measured with the NA48 detector at the CERN SPS. A total of 59 events has been observed with an estimated background of 14 events. The overall Kaon flux was determined to be 1.2 x 10^(9). This observation corresponds to a branching ratio of (3.4 +/- 0.6(stat) +/- 0.4(sys)) x 10^(-7). Using this branching ratio the parameter alpha(K*) describing the relative strength of the two contributing amplitudes to this decay, through intermediate pseudoscalar or vectorlike mesons, was measured to be alpha_(K*) = -0.04(-0.21)(+0.24).File in questo prodotto:
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