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arXiv 2502.09403hep-ex
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利用ATLAS探测器在低堆积数据中测量质子-质子碰撞中$\sqrt{s} = 5.02$ TeV和$13$ TeV下$W^{\pm}$玻色子微分截面

Measurement of $W^{\pm}$-boson differential cross-sections in proton-proton collisions with low pile-up data at $\sqrt{s} = 5.02$ TeV and $13$ TeV with the ATLAS detector

ATLAS Collaboration

AI总结:

利用ATLAS探测器在5.02 TeV和13 TeV低堆积质子-质子碰撞数据中测量W玻色子单、双微分截面及电荷不对称性,结果与标准模型预言一致,并研究了其对部分子分布函数确定的影响。

摘要:

在质心能量$\sqrt{s}=5.02$ TeV和13 TeV的质子-质子碰撞中,测量了作为电子或缪子横动量$p_\mathrm{T}$或其赝快度$η$函数的高精度单微分$W^\pm$玻色子产生截面,以及作为这些变量函数的双微分截面。还测量了作为轻子$η$函数的$W$玻色子电荷不对称性。数据是在大型强子对撞机上利用ATLAS探测器在降低瞬时亮度的专用运行中收集的,对应于5.02 TeV下255 pb$^{-1}$和13 TeV下338 pb$^{-1}$的积分亮度。测量结果与标准模型预言一致,这些预言在强耦合常数$α_s$的次次领头阶下计算,并使用若干部分子分布函数在次次领头对数精度下包含横动量重求和。利用轮廓分析法研究了作为轻子$η$函数的测量微分截面对确定这些函数的影响。

英文摘要:

High precision single-differential $W^\pm$-boson production cross-sections as a function of electron or muon transverse momentum $p_\mathrm{T}$ or their pseudorapity $η$, as well as double-differential cross-sections as functions of these variables, are measured in proton-proton collisions at centre-of-mass energies $\sqrt{s}=5.02$ TeV and 13 TeV. The $W$-boson charge asymmetry as a function of lepton $η$ is also measured. The data, collected in dedicated runs at reduced instantaneous luminosity with the ATLAS detector at the Large Hadron Collider, correspond to integrated luminosities of 255 pb$^{-1}$ at 5.02 TeV and 338 pb$^{-1}$ at 13 TeV. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in the strong coupling constant $α_s$ including transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy using several parton distribution functions. The impact of the measured differential cross-sections as a function of lepton $η$ on the determination of these functions is studied using a profiling technique.

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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