Measurement of the B+/B0 production ratio in e+e− collisions at the ϒ(4S) resonance using B→J/ψ(ℓℓ)K decays at Belle

Measurement of the B+/B0 production ratio in e+e− collisions at the ϒ(4S) resonance using B→J/ψ(ℓℓ)K decays at Belle
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使用 B-J/Ï(--)K 在 Belle 处衰减测量 Ï(4S) 共振下 e e- 碰撞中的 B /B0 生成比

DOI:
10.1103/physrevd.107.l031102
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发表时间:
2023
期刊:
影响因子:
5
通讯作者:
Ayad, R.
Ayad, R.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Choudhury, S.;Sandilya, S.;Trabelsi, K.;Giri, A.;Adachi, I.;Aihara, H.;Asner, D. M.;Atmacan, H.;Aushev, T.;Ayad, R.

文献摘要

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我们用贝儿探测器在π(4S)共振处收集的数据测量了π(4S)衰变的分支分数与和的比值,其中和代表(或)。我们发现,γ(4S)→B+B-与γ(4S)→ B 0 B 0的衰变率比为,这是迄今为止最精确的测量。第一和第二个不确定度分别是统计的和系统的,第三个不确定度是由于假设的同位旋对称性。
We measure the ratio of branching fractions for the ϒ(4S) decays toandusingandsamples, wherestands for(or), withof data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in.