We present a measurement of the K-pi vector current form-factor parameters for the decay K-L -> pi(+/-)e(-/+)nu. We use 328 pb(-1) of data collected in 2001 and 2002, corresponding to similar to 2 million K-e3 events. Measurements of semileptonic form factors provide information about the dynamics of the strong interaction and are necessary for evaluation of the phase-space integral I-K(e) needed to measure the CKM matrix element |V-us| for K-L -> pi(+/-)e(-/+)nu decays. Our result is lambda(+) = (28.6 +/- 0.5 +/- 0.4) x 10(-3) for a linear fit, and lambda'(+) = (25.5 +/- 1.5 +/- 1.0) x 10(-3), (1.4 +/- 0.7 +/- 0.4) x 10(-3) for a quadratic fit. (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 form-factor slopes for the decay K-L -> pi(+/-)e(+/-)nu with the KLOE detector. PHYSICS LETTERS. SECTION B, 636(3-4), 166-172 [10.1016/j.physletb.2006.03.036].

Measurement of the form-factor slopes for the decay K-L -> pi(+/-)e(+/-)nu with the KLOE detector

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

Abstract

We present a measurement of the K-pi vector current form-factor parameters for the decay K-L -> pi(+/-)e(-/+)nu. We use 328 pb(-1) of data collected in 2001 and 2002, corresponding to similar to 2 million K-e3 events. Measurements of semileptonic form factors provide information about the dynamics of the strong interaction and are necessary for evaluation of the phase-space integral I-K(e) needed to measure the CKM matrix element |V-us| for K-L -> pi(+/-)e(-/+)nu decays. Our result is lambda(+) = (28.6 +/- 0.5 +/- 0.4) x 10(-3) for a linear fit, and lambda'(+) = (25.5 +/- 1.5 +/- 1.0) x 10(-3), (1.4 +/- 0.7 +/- 0.4) x 10(-3) for a quadratic fit. (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 form-factor slopes for the decay K-L -> pi(+/-)e(+/-)nu with the KLOE detector. PHYSICS LETTERS. SECTION B, 636(3-4), 166-172 [10.1016/j.physletb.2006.03.036].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/120421
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