Measurement of the K-L -> e(+)e(-)e(+)e(-) decay rate
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Measurement of the K-L -> e(+)e(-)e(+)e(-) decay rate
The decay rate of the long-lived neutral K meson into the e(+)e(-)e(+)e(-) final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(K-L -> e(+)e(-)e(+)e(-)) = (3.30 +/- 0.24(stat)+/- 0.23(syst)+/- 0-10(norm)) x 10(-8). (c) 2005 Elsevier B.V. All rights reserved.
Italy
- Sapienza University of Rome Italy
- University of Padua Italy
- University of Pisa Italy
- University of Modena and Reggio Emilia Italy
- University of Ferrara Italy
mesoni K; decadimenti, BRANCHING RATIO; CP VIOLATION; MESONS; KL->GAMMA-GAMMA; KS->GAMMA-GAMMA; PARITY; ORIGIN; RULE, Kaon mesons, kaon decay; NEUTRAL KAON; BRANCHING RATIO
mesoni K; decadimenti, BRANCHING RATIO; CP VIOLATION; MESONS; KL->GAMMA-GAMMA; KS->GAMMA-GAMMA; PARITY; ORIGIN; RULE, Kaon mesons, kaon decay; NEUTRAL KAON; BRANCHING RATIO
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