Precision test of the SM with Kl2 and Kl3 decays at KLOE

Antonelli, M. (2009) Precision test of the SM with Kl2 and Kl3 decays at KLOE. Il nuovo cimento C, 32 (5\6). pp. 205-213. ISSN 1826-9885

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Kaon decay studies seeking new-physics (NP) effects in leptonic (Kl2) or semileptonic (Kl3) decays are discussed. A unitarity test of the first row of the CKM mixing matrix is obtained from the KLOE precision measurements of Kl3 widths for K±, KL, and (unique to KLOE) KS, complemented with the absolute branching ratio for the Kμ2 decay. KLOE results lead to constraints for NP models and can probe possible charged Higgs exchange contribution in SM extensions with two Higgs doublets. The main focus in the present document is set on a new measurement of RK = Γ(Ke2)/Γ(Kμ2) with an accuracy at the % level, aiming at finding evidence of deviations from the SM prediction induced by lepton-flavor violation NP effects.

Item Type: Article
Uncontrolled Keywords: Decays of K mesons ; Precision measurements in e−e+ interactions
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 27 Mar 2020 16:47
Last Modified: 27 Mar 2020 16:47

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