The 6th international conference on particle physics and astrophysics

First measurement of the K± → π 0π 0µ ±ν decay

30 Nov 2022, 19:35

15m

Moskvorechye 1 (Hotel Intourist Kolomenskoye 4*)

Oral talk High energy physics: experiment High Energy Physics: Experiment

Description

The first observation of the decay K± → π
0π
0µ
±ν (K00
µ4) by the NA48/2
experiment at the CERN-SPS is reported. From 2437 selected signal candidates with 15%
background contamination, the branching ratio of the decay is measured in the restricted
kinematical space of the squared dilepton mass above 0.03 GeV2
/c4
and extrapolated to the full
kinematical space. The result is found to be in agreement with the R form factor from 1-loop
Chiral Perturbation Theory.

Presentation Materials

ICPPA KMU4N 2022.pdf