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质心能量$\boldsymbol{\frac{}{s}}$=13 TeV质子-质子碰撞中Drell-Yan产生过程里轻子对横动量的质量依赖性测量

Measurement of the mass dependence of the transverse momentum of lepton pairs in Drell-Yan production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

CMS Collaboration

备注：
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-20-003 (CMS Public Pages)
发表信息：
Eur. Phys. J. C 83 (2023) 628
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AI总结：

本研究利用LHC的CMS探测器在13 TeV质心能量下采集的36.3 fb⁻¹质子-质子碰撞数据，测量Drell-Yan轻子对产生的双微分截面，探究其横动量的质量依赖性，并与微扰QCD理论预言对比。

摘要：

测量了Drell-Yan轻子对（$\boldsymbol{\frac{}{ℓ^+ℓ^-}}$，即双电子或双μ子）产生过程的双微分截面，将其作为不变质量$\boldsymbol{m_{ℓℓ}}$、横动量$\boldsymbol{p_\frac{}{T}(ℓℓ)}$以及$\boldsymbol{ϕ^*_η}$的函数。$\boldsymbol{ϕ^*_η}$观测量由轻子的角测量推导得到，与$\boldsymbol{p_\frac{}{T}(ℓℓ)}$高度相关，被用于以互补方式探测低$\boldsymbol{p_\frac{}{T}(ℓℓ)}$区域。研究覆盖的双轻子质量最高达1 TeV。此外，还开展了要求末态至少包含一个喷注的测量。为利用系统不确定性的部分抵消效应，给出了不同$\boldsymbol{m_{ℓℓ}}$区间的微分截面与Z质量峰区间微分截面的比值。本次分析所用数据对应LHC上CMS探测器记录的质心能量13 TeV质子-质子碰撞数据，积分亮度为36.3 fb$\boldsymbol{^{-1}}$。测量结果与基于微扰量子色动力学（包含软胶子重求和）的理论预言进行了对比。

英文摘要：

The double differential cross sections of the Drell-Yan lepton pair ($\ell^+\ell^-$, dielectron or dimuon) production are measured as functions of the invariant mass $m_{\ell\ell}$, transverse momentum $p_\mathrm{T}(\ell\ell)$, and $ϕ^*_η$. The $ϕ^*_η$ observable, derived from angular measurements of the leptons and highly correlated with $p_\mathrm{T}(\ell\ell)$, is used to probe the low-$p_\mathrm{T}(\ell\ell)$ region in a complementary way. Dilepton masses up to 1 TeV are investigated. Additionally, a measurement is performed requiring at least one jet in the final state. To benefit from partial cancellation of the systematic uncertainty, the ratios of the differential cross sections for various $m_{\ell\ell}$ ranges to those in the Z mass peak interval are presented. The collected data correspond to an integrated luminosity of 36.3 fb$^{-1}$ of proton-proton collisions recorded with the CMS detector at the LHC at a centre-of-mass energy of 13 TeV. Measurements are compared with predictions based on perturbative quantum chromodynamics, including soft-gluon resummation.

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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