论文标题
顶级夸克质量运行的首次实验研究
First experimental investigation of the running of the top quark mass
论文作者
论文摘要
提出了对顶级夸克质量运行的首次实验研究。从修改后的最小减法（$ \ MATHRM {\ MATHRM {\ MASS}} $）恢复归一化方案中定义的运行是从对差分顶Quark-Antiquark的测量中提取的系统使用近代领先顺序的理论预测。该测量是使用质子 - 质子碰撞在2016年CMS检测器记录的质子质量碰撞的$ 13〜 \ MATHRM {TEV} $进行的，2016年在CERN LHC上记录，对应于$ 35.9〜 \ MATHRM {fb^{ - 1}} $的集成亮度。候选$ \ mathrm {t \ bar {t}} $事件在最终状态下使用电子和相反的电荷选择，并且通过最大可能拟合的多差分布来确定差分横截面。发现提取的运行与相应的重量化组方程的解决方案兼容，最多可达$ 1〜 \ mathrm {tev} $的顺序。
The first experimental investigation of the running of the top quark mass is presented. The running, defined in the modified minimal subtraction ($\mathrm{\overline{MS}}$) renormalization scheme, is extracted from a measurement of the differential top quark-antiquark ($\mathrm{t\bar{t}}$) production cross section as a function of the invariant mass of the $\mathrm{t\bar{t}}$ system using theoretical predictions at next-to-leading order. The measurement is performed using proton-proton collisions at a centre-of-mass energy of $13~\mathrm{TeV}$ recorded by the CMS detector at the CERN LHC in 2016, corresponding to an integrated luminosity of $35.9~\mathrm{fb^{-1}}$. Candidate $\mathrm{t\bar{t}}$ events are selected in the final state with an electron and a muon of opposite charge, and the differential cross section is determined at the parton level by means of a maximum-likelihood fit to multidifferential distributions. The extracted running is found to be compatible with the solution of the corresponding renormalization group equation, up to a scale on the order of $1~\mathrm{TeV}$.
