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 198×10^6 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 198×10^6 BB pairs in Belle II data
Tenchini, F.;
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 198×10^6 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.File in questo prodotto:
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PhysRevD.107.112009.pdf
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