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.
Measurement of 𝐶𝑃 Violation in 𝐵0 →𝐾0𝑆𝜋0 Decays at Belle II
Bianchi, F.;Das, S.;Destefanis, M.;Maggiora, M.;Marcello, S.;Spataro, S.;
2023-01-01
Abstract
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.File in questo prodotto:
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PhysRevLett.131.111803.pdf
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