We report measurements of the branching fraction and CP asymmetry in B0 → π0 π0 decays reconstructed at Belle II in an electron-positron collision sample containing 198×106 BB̄ pairs. We measure a branching fraction B(B0 → π0 π0) = (1.38 ± 0.27 ± 0.22) × 10−6 and a CP asymmetry ACP (B0 → π0 π0) = 0.14 ± 0.46 ± 0.07, where the first uncertainty is statistical and the second is systematic.
Abudinén, F., Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., et al. (2023). Measurement of the branching fraction and CP asymmetry of B0→π0π0 decays using 198×106 BB¯ pairs in Belle II data. PHYSICAL REVIEW D, 107(11), 112009-1-112009-10 [10.1103/PhysRevD.107.112009].
Measurement of the branching fraction and CP asymmetry of B0→π0π0 decays using 198×106 BB¯ pairs in Belle II data
Bernieri, E.Membro del Collaboration Group
;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
;
2023-01-01
Abstract
We report measurements of the branching fraction and CP asymmetry in B0 → π0 π0 decays reconstructed at Belle II in an electron-positron collision sample containing 198×106 BB̄ pairs. We measure a branching fraction B(B0 → π0 π0) = (1.38 ± 0.27 ± 0.22) × 10−6 and a CP asymmetry ACP (B0 → π0 π0) = 0.14 ± 0.46 ± 0.07, where the first uncertainty is statistical and the second is systematic.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
