论文标题
$ \ sqrt {s} $ = 13 tev的质子 - 普罗顿碰撞中的两种喷气式电源的w $γ$的测量
Measurement of the electroweak production of W$γ$ in association with two jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
提出了用于质子 - 蛋白质碰撞中的W玻色子，光子（$γ$）和两个喷气机（j）的电动产生的测量。 W玻色子的松弛衰减是通过需要一个鉴定出的电子或MUON和大的缺失横向动量来选择的。这两个喷气机必须具有较大的不变dijet质量和伪造性的较大分离。测量是用CMS检测器在13 TEV的质量中心能量收集的数据进行的，对应于138 fb $^{ - 1} $的集成光度。 Electroweak W $γ$ JJ的生产的横截面为23.5 $^{+4.9} _ { - 4.7} $ fb，而W $γ$ JJ生产的总横截面为113 $ \ pm $ 13 fb。还可以通过分布展开到粒子水平来测量差分横截面。所有结果都与标准模型期望一致。根据维度8的有效现场理论运算符，对异常的四分之一量规耦合（AQGC）放置了约束。这些是迄今为止在AQGCS参数上最严格的限制，$ f_ \ mathrm {m，2-5} $ $/$ $/$ $/$ $/$ $λ^4 $和$ f_ \ mathrm {t，6-7} $/$ $/$ $ $ $ $ $ucλ^4 $。
A measurement is presented for the electroweak production of a W boson, a photon ($γ$), and two jets (j) in proton-proton collisions. The leptonic decay of the W boson is selected by requiring one identified electron or muon and large missing transverse momentum. The two jets are required to have large invariant dijet mass and large separation in pseudorapidity. The measurement is performed with the data collected by the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The cross section for the electroweak W$γ$jj production is 23.5 $^{+4.9}_{-4.7}$ fb, whereas the total cross section for W$γ$jj production is 113 $\pm$ 13 fb. Differential cross sections are also measured with the distributions unfolded to the particle level. All results are in agreement with the standard model expectations. Constraints are placed on anomalous quartic gauge couplings (aQGCs) in terms of dimension-8 effective field theory operators. These are the most stringent limits to date on the aQGCs parameters $f_\mathrm{M,2-5}$ $/$ $Λ^4$ and $f_\mathrm{T,6-7}$ $/$ $Λ^4$.
