We present a measurement of the branching ratio of the CP violating decay K-L -> pi(+)pi(-) performed by the KLOE experiment at the phi factory DA Phi NE. We use 328pb(-1) of data collected in 2001 and 2002, corresponding to similar to 150 million tagged K-L mesons. We find BR(K-L -> pi(+)pi(-)) = (1.963 +/- 0.012(stat). +/- 0.017(syst.)) x 10(-3). This branching ratio measurement is fully inclusive of final-state radiation. Using the above result, we determine the modulus of the amplitude ratio vertical bar eta(+-)| to be (2.219 +/- 0.013) x 10(-3) and vertical bar epsilon vertical bar to be (2.216 +/- 0.013) x 10(-3). (c) 2006 Elsevier B.V. All rights reserved.

Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., et al. (2006). Measurement of the branching ratio of the K-L ->pi(+) pi(-) decay with the KLOE detector. PHYSICS LETTERS. SECTION B, 638(2-3), 140-145 [10.1016/j.physletb.2006.05.039].

Measurement of the branching ratio of the K-L ->pi(+) pi(-) decay with the KLOE detector

CERADINI, Filippo;DI MICCO, Biagio;
2006-01-01

Abstract

We present a measurement of the branching ratio of the CP violating decay K-L -> pi(+)pi(-) performed by the KLOE experiment at the phi factory DA Phi NE. We use 328pb(-1) of data collected in 2001 and 2002, corresponding to similar to 150 million tagged K-L mesons. We find BR(K-L -> pi(+)pi(-)) = (1.963 +/- 0.012(stat). +/- 0.017(syst.)) x 10(-3). This branching ratio measurement is fully inclusive of final-state radiation. Using the above result, we determine the modulus of the amplitude ratio vertical bar eta(+-)| to be (2.219 +/- 0.013) x 10(-3) and vertical bar epsilon vertical bar to be (2.216 +/- 0.013) x 10(-3). (c) 2006 Elsevier B.V. All rights reserved.
2006
Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., et al. (2006). Measurement of the branching ratio of the K-L ->pi(+) pi(-) decay with the KLOE detector. PHYSICS LETTERS. SECTION B, 638(2-3), 140-145 [10.1016/j.physletb.2006.05.039].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/121152
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