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 about 2 million Ke3 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 IeK needed to measure the CKM matrix element |Vus | for K(L) →pi+-e-+nu decays. Our result is (lambda)+ = (28.6±0.5±0.4)×10-3 for a linear fit, and (lambda)'+ = (25.5±1.5±1.0)×10^-3, (lambda)''+ = (1.4±0.7±0.4)×10^-3 for a quadratic fit.
Measurement of the form-factor slopes for the decay K(L)-->pi+-e-+nuwith the KLOE detector / Ambrosino, F., A., A., M., A., C., B., P., B., G., B., S., B., C., B., C., B., V., B., F., B., D., B., P., B., R., C., P., C., G., C., T., C., F., C., S., C., G., C., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 636:3-4(2006), pp. 166-172. [10.1016/j.physletb.2006.03.036]
Measurement of the form-factor slopes for the decay K(L)-->pi+-e-+nuwith the KLOE detector
AMBROSINO, FABIO;MASSAROTTI, PAOLO;SARACINO, GIULIO;
2006
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 about 2 million Ke3 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 IeK needed to measure the CKM matrix element |Vus | for K(L) →pi+-e-+nu decays. Our result is (lambda)+ = (28.6±0.5±0.4)×10-3 for a linear fit, and (lambda)'+ = (25.5±1.5±1.0)×10^-3, (lambda)''+ = (1.4±0.7±0.4)×10^-3 for a quadratic fit.| File | Dimensione | Formato | |
|---|---|---|---|
|
Measurement of the form factor ....pdf
non disponibili
Tipologia:
Documento in Post-print
Licenza:
Accesso privato/ristretto
Dimensione
279.58 kB
Formato
Adobe PDF
|
279.58 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
