Precision measurement of the Branching fractions of etaprime decays
Precision measurement of the Branching fractions of etaprime decays
复制标题
精确测量 etaprime 衰变的分支分数
DOI:
10.1103/physrevlett.122.142002
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
BESIII Collaboration M. Ablikim et al
中科院分区:
文献类型:
--
作者:
BESIII Collaboration M. Ablikim et al
Based on a sample ofevents collected with the BESIII detector, we present measurements ofandabsolute branching fractions using the process. By analyzing events where the radiative photon converts into anpair, the branching fraction foris measured to be. The absolute branching fractions of the five dominant decay channels of theare then measured for the first time and are determined to be B(η′→γπ+π-)=(29.90±0.03±0.55)%, B(η′→ηπ+π-)=(41.24±0.08±1.24)%, B(η′→ηπ0π0)=(21.36±0.10±0.92)%,, and, where the first uncertainties are statistical and the second systematic.