Adachi, I.Adamczyk, K.Aggarwal, L.Ahmed, H.Aihara, H.Akopov, N.Aloisio, A.Anh Ky, N.Asner, D. M.Atmacan, H.Aushev, T.Aushev, V.Aversano, M.Babu, V.Bae, H.Bahinipati, S.Bambade, P.Banerjee, S.Barrett, M.Baudot, J.Bauer, M.Baur, A.Beaubien, A.Becker, J.Behera, P. K.Bennett, J. V.Bertacchi, V.Bertemes, M.Bertholet, E.Bessner, M.Bettarini, S.Bhuyan, B.Bianchi, F.Bilka, T.Biswas, D.Bodrov, D.Bondar, A.Borah, J.Bozek, A.Bračko, M.Branchini, P.Briere, R. A.Browder, T. E.Budano, A.Bussino, S.Campajola, M.Cao, L.Casarosa, G.Cecchi, C.Cerasoli, J.Chang, P.Cheaib, R.Cheema, P.Chekelian, V.Chen, C.Cheon, B. G.Chilikin, K.Chirapatpimol, K.Cho, H. E.Cho, K.Cho, S. J.Choi, S. K.Choudhury, S.Cochran, J.Corona, L.Cremaldi, L. M.Das, S.Dattola, F.De La Cruz-Burelo, E.De La Motte, S. A.De Marino, G.De Nuccio, M.De Pietro, G.De Sangro, R.Destefanis, M.De Yta-Hernandez, A.Dhamija, R.Di Canto, A.Di Capua, F.Dingfelder, J.DoleŽal, Z.Domínguez Jiménez, I.Dong, T. V.Dorigo, M.Dort, K.Dreyer, S.Dubey, S.Dujany, G.Ecker, P.Eliachevitch, M.Feichtinger, P.Ferber, T.Ferlewicz, D.Fillinger, T.Finck, C.Finocchiaro, G.Fodor, A.Forti, F.Fulsom, B. G.Gabrielli, A.2023-12-082023-12-082023-09-152023-09-140031-9007https://hdl.handle.net/10919/117147We 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.Pages 111803PrintIn CopyrightBelle II Collaboration5106 Nuclear and Plasma Physics5107 Particle and High Energy Physics4902 Mathematical Physics49 Mathematical Sciences51 Physical Sciences40 EngineeringArticle - Refereedhttps://doi.org/10.1103/PhysRevLett.131.11180313111Piilonen, Leo [0000-0001-6836-0748]377742611079-7114