We report a measurement of decay-time-dependent charge-parity (CP) asymmetries in B0 → decays. We use 387 × 10^6 BB̄ pairs collected at the ϒ(4S) resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the CP-violating parameters S and C from a fit to the distribution of the decay-time difference between the two B mesons. The resulting confidence region is consistent with previous measurements in B0 → K0S K0S K0S and B0 → (cc̄)K0 decays and with predictions based on the standard model.
Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2024). Measurement of CP asymmetries in B0 → KS0 KS0 KS0 decays at Belle II. PHYSICAL REVIEW D, 109(11), 112020-1-112020-11 [10.1103/physrevd.109.112020].
Measurement of CP asymmetries in B0 → KS0 KS0 KS0 decays at Belle II
Branchini, P.Membro del Collaboration Group
;Budano, A.Membro del Collaboration Group
;Bussino, S.Membro del Collaboration Group
;De Pietro, G.Membro del Collaboration Group
;Laurenza, M.Membro del Collaboration Group
;Martellini, C.Membro del Collaboration Group
;Martini, A.Membro del Collaboration Group
;
2024-01-01
Abstract
We report a measurement of decay-time-dependent charge-parity (CP) asymmetries in B0 → decays. We use 387 × 10^6 BB̄ pairs collected at the ϒ(4S) resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the CP-violating parameters S and C from a fit to the distribution of the decay-time difference between the two B mesons. The resulting confidence region is consistent with previous measurements in B0 → K0S K0S K0S and B0 → (cc̄)K0 decays and with predictions based on the standard model.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
