We present a measurement of the K-π vector current form-factor parameters for the decay KL → π± e∓ ν. We use 328 pb-1 of data collected in 2001 and 2002, corresponding to ∼2 million Ke 3 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 IKe needed to measure the CKM matrix element | Vu s | for KL → π± e∓ ν decays. Our result is λ+ = ( 28.6 ± 0.5 ± 0.4 ) × 10-3 for a linear fit, and λ+′ = ( 25.5 ± 1.5 ± 1.0 ) × 10-3, λ+″ = ( 1.4 ± 0.7 ± 0.4 ) × 10-3 for a quadratic fit. © 2006 Elsevier B.V. All rights reserved.

Ambrosino, F., Antonelli, A., Antonelli, M., B. a. c. c. i., C., Beltrame, P., Santovetti, E. (2006). Measurement of the form-factor slopes for the decay KL -> pi(+-) e(-+) nu with the KLOE detector. PHYSICS LETTERS. SECTION B, 636, 166-172 [10.1016/j.physletb.2006.03.036].

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

SANTOVETTI, EMANUELE
2006-01-01

Abstract

We present a measurement of the K-π vector current form-factor parameters for the decay KL → π± e∓ ν. We use 328 pb-1 of data collected in 2001 and 2002, corresponding to ∼2 million Ke 3 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 IKe needed to measure the CKM matrix element | Vu s | for KL → π± e∓ ν decays. Our result is λ+ = ( 28.6 ± 0.5 ± 0.4 ) × 10-3 for a linear fit, and λ+′ = ( 25.5 ± 1.5 ± 1.0 ) × 10-3, λ+″ = ( 1.4 ± 0.7 ± 0.4 ) × 10-3 for a quadratic fit. © 2006 Elsevier B.V. All rights reserved.
2006
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
Ke 3 form factor
Ambrosino, F., Antonelli, A., Antonelli, M., B. a. c. c. i., C., Beltrame, P., Santovetti, E. (2006). Measurement of the form-factor slopes for the decay KL -> pi(+-) e(-+) nu with the KLOE detector. PHYSICS LETTERS. SECTION B, 636, 166-172 [10.1016/j.physletb.2006.03.036].
Ambrosino, F; Antonelli, A; Antonelli, M; B. a. c. c. i., C; Beltrame, P; Santovetti, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/39453
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