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

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.
2023
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https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.112009
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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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