Measurement of CP Violation in B0 → KS0 π0 Decays at Belle II

TR Number
2023-09-15, 2023-09-14
Journal Title
Journal ISSN
Volume Title
American Physical Society (APS)

We report a measurement of the CP-violating parameters C and S in B0→KS0π0 decays at Belle II using a sample of 387×106 BB¯ events recorded in e+e- collisions at a center-of-mass energy corresponding to the ϒ(4S) resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain C=-0.04-0.15+0.14±0.05 and S=0.75-0.23+0.20±0.04, where the first uncertainties are statistical and the second are systematic.

Belle II Collaboration, 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences, 40 Engineering