International Conference on Kaon Physics 2019

Session

Semileptonic and 4 bodies kaon decays and CKM matrix

Sep 10, 2019, 2:00 PM

Aula Magna (University of Perugia (Italy))

Conveners

Semileptonic and 4 bodies kaon decays and CKM matrix

• Rainer Wanke (Universität Mainz)

51. Charged Kaon semi-leptonic form factors from NA48/2

Gianluca Lamanna (INFN e Laboratori Nazionali di Frascati (IT))

9/10/19, 2:00 PM

Talk

The most precise measurement of the charged kaon semi-leptonic form factors obtained by NA48/2 with 4.4 million Ke3 and 2.3 million Kmu3 events collected in 2004 will be presented.

59. Extraction of Vus from experimental measurements

Emilie Passemar

9/10/19, 2:25 PM

Talk

44. Recent progress in kaon 4-body semileptonic decays

Dr Oscar Cata

9/10/19, 2:50 PM

Talk

I will report on recent studies of the decays K^+->pi^+pi^0e^+e^- and K_S->pi^+pi^-e^+e^-, focusing on their role as chiral tests. I will discuss how a precise enough measurement of any of these decay modes at CERN would help to complete the experimental determination of the NLO chiral counterterms involved in radiative kaon decays. I will also comment on the existing theoretical estimates for...

50. First observation and study of the K± → π±π0e+e− decay with the NA48/2 experiment at CERN

Brigitte Bloch-Devaux (Universita e INFN Torino (IT))

9/10/19, 3:15 PM

Talk

The NA48/2 experiment at CERN reports the first observation of the K± → π±π0e e− decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003−2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in...