Belle II全事件解释的早期结果

Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-26 DOI:10.22323/1.390.0787

William Sutcliffe

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摘要

标签侧多元分类器选择松散，标签侧+介子和0介子的校正因子分别为0.65±0.02和0.83±0.03。标定的强子标签侧衰变模式用于测量Belle II数据34.6 fb−1中的分支分数B(0→∗+l−āl) =(4.45±0.41(stat)±0.27(sys)±0.45(cs)) × 10−2和B(0→c+l−āl) =(1.62±0.42(stat)±0.07(sys)) × 10−4。

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Early results from Full Event Interpretation at Belle II

loose selection on the tag-side multivariate classifier, the calibration factors are 0.65± 0.02 and 0.83 ± 0.03 for tag-side + and 0 mesons, respectively. The calibrated hadronic tag-side decay modes are used to measure the branching fractions B( 0 → ∗+l− āl) = (4.45 ± 0.41(stat) ± 0.27(sys) ± 0.45(cs)) × 10−2 and B( 0 → c+l− āl) = (1.62 ± 0.42(stat) ± 0.07(sys)) × 10−4 in 34.6 fb−1 of Belle II data.

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Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)

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