Abstract
The NA48/2 experiment collected unprecedent statistics of charged kaon decays in 2003 and 2004. The main purpose of the experiment was to measure direct CP violation in kaon decays to three pions while an extensive physics program was carried out together with the main goal. The huge statistics collected allowed to test with a high accuracy the predictions of low energy QCD theories in several charged kaon decay processes. The precise measurement of the charged kaon semileptonic form factors are reported here, based on data collected in 2004 with a dedicated minimum bias trigger.
Highlights
Kaon decays played an important role in the understanding of the flavor structure of the Standard Model (SM)
The NA48/2 experiment The beamline of the NA48/2 experiment has been designed to allow the measurement of the CP-violating charged asymmetry through the study of the Dalitz Plot in the K → 3π decay [1]
A dedicated data taking period (52 hours in 2004) with a minimum bias trigger collected 4.8 × 108 events used in the analysis presented here
Summary
Kaon decays played an important role in the understanding of the flavor structure of the Standard Model (SM). A dedicated data taking period (52 hours in 2004) with a minimum bias trigger (one track in the CHOD and at least 10 GeV in the LKr) collected 4.8 × 108 events used in the analysis presented here. The decay width of Kl3 decays are described in the Dalitz plot as a function of the lepton and pion energies in kaon rest frame, El∗ and Eπ∗.
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