We report measurements of the branching fraction and CP asymmetry in B0→π0π0 decays reconstructed at Belle II in an electron-positron collision sample containing 198×106 BB¯ pairs. We measure a branching fraction B(B0→π0π0)=(1.38±0.27±0.22)×10-6 and a CP asymmetry ACP(B0→π0π0)=0.14±0.46±0.07, where the first uncertainty is statistical and the second is systematic.

Measurement of the branching fraction and CP asymmetry of B0 → π0π0 decays using 198 × 106 BB ̄ pairs in Belle II data

Bianchi, F.;Das, S.;Destefanis, M.;Maggiora, M.;Marcello, S.;Spataro, S.;
2023-01-01

Abstract

We report measurements of the branching fraction and CP asymmetry in B0→π0π0 decays reconstructed at Belle II in an electron-positron collision sample containing 198×106 BB¯ pairs. We measure a branching fraction B(B0→π0π0)=(1.38±0.27±0.22)×10-6 and a CP asymmetry ACP(B0→π0π0)=0.14±0.46±0.07, where the first uncertainty is statistical and the second is systematic.
2023
107
11
112009-1
112009-10
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.112009
Cabibbo–Kobayashi–Maskawa matrix, Electroweak interaction, Particle decays, Particle phenomena
Abudinén, F.; Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2069039
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