Wuppertal 2015 – scientific programme
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T: Fachverband Teilchenphysik
T 22: CP: B-Mesonen, Kaon
T 22.7: Talk
Monday, March 9, 2015, 18:15–18:30, L.09.28 (HS 12)
Measurement of the Form Factors in the Decay Channel K+ → π0 e+ νe — •David Lomidze — Institute of physiks, Mainz
Within the Standard Model, semileptonic kaon decays can provide the experimentally most accurate and theoretically cleanest way for determination of the element |Vus| of the CKM matrix. To do this, a precise knowledge of the form factors in K+ → π0 e+ νe (Ke3) decays is crucial.
The NA62 experiment at CERN collected huge sample of Ke3 decays during a dedicated physics run in 2007 for the measurement of the ratio RK = Γ(K+ → e+ν) / Γ(K+ →µ+ν). With these statistics, a determination of the form factors with high precision is possible. This talk reports preliminary measurements of the form factors of the semileptonic decay K+ → π0 e+ νe, based on 50 million Ke3 events with negligible background.