论文标题
PP碰撞中Z Boson隐形宽度的精确测量在$ \ sqrt {s} $ = 13 TEV
Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
使用CMS实验记录的LHC的CMS实验记录的数据，对质子 - 质子碰撞中在质子质子碰撞中产生的Z玻色子的不可见宽度进行了精确测量，对应于36.3 fb $^{ - 1} $的综合亮度。结果是从Z Boson Plus Jets的两个数据样本的同时拟合与运动学分布中获得的：一种由Z玻色子衰变统治到隐形颗粒，另一个由Z玻色子衰变到Muon和Electron Pairs。看不见的宽度为523 $ \ pm $ 3（stat）$ \ pm $ 16（SYST）MEV。该结果是在强子对撞机上对Z玻色子的看不见宽度的首次精确测量，并且是迄今为止最精确的直接测量，与LEP实验直接测量的综合结果竞争。
A precise measurement of the invisible width of the Z boson produced in proton-proton collisions at a center-of-mass energy of 13 TeV is presented using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The result is obtained from a simultaneous fit to kinematic distributions for two data samples of Z boson plus jets: one dominated by Z boson decays to invisible particles and the other by Z boson decays to muon and electron pairs. The invisible width is measured to be 523 $\pm$ 3 (stat) $\pm$ 16 (syst) MeV. This result is the first precise measurement of the invisible width of the Z boson at a hadron collider, and is the single most precise direct measurement to date, competitive with the combined result of the direct measurements from the LEP experiments.
