Observation of the Production of a W Boson in Association with a Single Charm Quark
Observation of the Production of a W Boson in Association with a Single Charm Quark
复制标题
观察与单个粲夸克相关的 W 玻色子的产生
DOI：
10.1103/physrevlett.110.071801
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发表时间：
2013
影响因子：
8.6
通讯作者：
468番目
中科院分区：
文献类型：
--
作者：
T. Aaltonen;S.H. Kim;I. Nakano;T. Okusawa;L. Ristori;Y. Seiya;F. Ukegawa;C. Vellidis;T. Yoshida;他465名;468番目
本文首次观测到碰撞过程中单个粲夸克喷注产生玻色子。分析使用的数据对应于，记录与CDF II探测器在费米实验室Tevatron。通过从强子喷注中的粲强子半轻子衰变中识别电子或μ子来选择粲夸克候选者，观察到一个信号，其显著性为5.7个标准差。计算了产生截面σWc（pTc>20 GeV/c，|ηc| <1.5）×B（W→ λ ν），与理论预期值相符。从这个结果导出了夸克混合矩阵元的大小，沿着，在95%的置信水平下，假设夸克耦合的产生占主导地位。
The first observation of the production of aboson with a single charm quark () jet incollisions atis reported. The analysis uses data corresponding to, recorded with the CDF II detector at the Fermilab Tevatron. Charm quark candidates are selected through the identification of an electron or muon from charm-hadron semileptonic decay within a hadronic jet, and asignal is observed with a significance of 5.7 standard deviations. The production cross section σWc(pTc>20 GeV/c,|ηc|<1.5)×B(W→ℓν) is measured to beand is in agreement with theoretical expectations. From this result the magnitude of the quark-mixing matrix elementis derived,along with a lower limit ofat the 95% confidence level, assuming that theproduction throughtoquark coupling is dominant.