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arXiv 2403.12902hep-ex
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利用ATLAS探测器在$\sqrt{s}=13.6$ TeV的$pp$碰撞中测量矢量玻色子产生截面及其比值

Measurement of vector boson production cross sections and their ratios using $pp$ collisions at $\sqrt{s}=13.6$ TeV with the ATLAS detector

ATLAS Collaboration

AI总结:

利用ATLAS探测器在13.6 TeV质子碰撞中测量W和Z玻色子产生截面及比值,结果与标准模型高阶预言一致。

摘要:

在大型强子对撞机上ATLAS实验于2022年收集的积分亮度为29 fb$^{-1}$的质子-质子碰撞数据中,以质心系能量$\sqrt{s}=13.6$ TeV测量了$W^\pm$和$Z$玻色子的符合 fiducial 截面和总截面、它们的比值以及顶夸克-反顶夸克对与$W$玻色子 fiducial 截面的比值。对于$W^+\to \ell^+ν$、$W^-\to \ell^-\barν$和$Z\to \ell^+\ell^-$($\ell=e$或$μ$)玻色子产生过程,测得的 fiducial 截面值分别为$4250\pm 150$ pb、$3310\pm 120$ pb和$744\pm 20$ pb,其中不确定性为总不确定性,包括约2.2%的亮度引起的不确定性。测量结果与在$α_s$中次次领头阶、次次领头对数精度和次领头电弱精度下计算的标准模型预言一致。

英文摘要:

Fiducial and total $W^\pm$ and $Z$ boson cross sections, their ratios and the ratio of top-antitop-quark pair and $W$-boson fiducial cross sections are measured in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13.6$ TeV, corresponding to an integrated luminosity of 29 fb$^{-1}$ of data collected in 2022 by the ATLAS experiment at the Large Hadron Collider. The measured fiducial cross-section values for $W^+\to \ell^+ν$, $W^-\to \ell^-\barν$, and $Z\to \ell^+\ell^-$ ($\ell=e$ or $μ$) boson productions are $4250\pm 150$ pb, $3310\pm 120$ pb, and $744\pm 20$ pb, respectively, where the uncertainty is the total uncertainty, including that arising from the luminosity of about 2.2%. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in $α_s$, next-to-next-to-leading logarithmic accuracy and next-to-leading-order electroweak accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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