Observation of the Semileptonic D+ Decay into the K1(1270)0-bar Axial-vector Meson
Observation of the Semileptonic D+ Decay into the K1(1270)0-bar Axial-vector Meson
复制标题
K1(1270)0-bar轴矢量介子半轻D衰变的观测
DOI：
10.1103/physrevlett.123.231801
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发表时间：
2019
影响因子：
8.6
通讯作者：
BESIII Collaboration
中科院分区：
文献类型：
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作者：
BESIII Collaboration
通过分析BEPCII对撞机上BESIII探测器在质心能量为3.773GeV时所记录到的10个碰撞样品，我们首次观测到了半轻子向轴矢量介子的跃迁，其统计显著性大于。其衰变分支率为B[D+→K <$1（1270）0 e +νe]=（2.30±0.26-0.21+0.18±0.25）×10-3，其中第一和第二不确定度分别是统计的和系统的，第三不确定度来自输入分支率。
By analyzing adata sample ofcollisions, recorded at a center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report the first observation of the semileptonictransition into the axial-vector mesonwith a statistical significance greater than. Its decay branching fraction is determined to be B[D+→K¯1(1270)0e+νe]=(2.30±0.26-0.21+0.18±0.25)×10-3, where the first and second uncertainties are statistical and systematic, respectively, and the third originates from the input branching fraction of.