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  B¯B 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 / 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., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, Sw., Bansal, S., Barrett, M., Baudot, J., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107/2023:11(2023), pp. 112009."-"-112009."-". [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

Gabrielli, A.;Ganiev, E.;Lanceri, L.;Manfredi, R.;Mantovano, M.;Raiz, S.;Vitale, L.;
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  B¯B 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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/3068418
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