Measurement of the Drell-Yan forward-backward asymmetry at high dilepton masses in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
Measurement of the Drell-Yan forward-backward asymmetry at high dilepton masses in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
复制标题
$$ sqrt{s} $$ = 13 TeV 质子-质子碰撞中高双轻子质量下 Drell-Yan 前后不对称性的测量
DOI：
10.1007/jhep08(2022)063
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发表时间：
2022
影响因子：
5.4
通讯作者：
Jeitler, M.
中科院分区：
文献类型：
--
作者：
Tumasyan, A.;Adam, W.;Andrejkovic, J. W.;Bergauer, T.;Chatterjee, S.;Damanakis, K.;Dragicevic, M.;Escalante Del Valle, A.;Frühwirth, R.;Jeitler, M.
本文测量了质子-质子碰撞中由Drell-Yan过程产生的带相反电荷的轻子对（双μ子和双电子）的前后不对称性。该数据样本对应于在LHC的CMS探测器在13 TeV的质心能量下收集的138 fb− 1的积分光度。的不对称性测量作为一个函数的轻子对质量大于170 GeV的质量，并与标准模型的预测。跨两个通道和整个质量范围的包容性测量产生0的不对称性。612±0。005（静态）±0. 007（系统）。作为轻子味普适性的测试，测量了双μ子和双电子不对称性之间的差异。未观察到与标准模型预测的统计学显著偏差。这些测量被用来限制额外规范玻色子的存在。对于序贯标准模型中的Z′玻色子，观测到的（预期的）Z′质量的95%置信下限是4.4 TeV（3.7 TeV）。
A measurement of the forward-backward asymmetry of pairs of oppositely charged leptons (dimuons and dielectrons) produced by the Drell-Yan process in proton-proton collisions is presented. The data sample corresponds to an integrated luminosity of 138 fb− 1 collected with the CMS detector at the LHC at a center-of-mass energy of 13 TeV. The asymmetry is measured as a function of lepton pair mass for masses larger than 170 GeV and compared with standard model predictions. An inclusive measurement across both channels and the full mass range yields an asymmetry of 0. 612±0. 005 (stat)±0. 007 (syst). As a test of lepton flavor universality, the difference between the dimuon and dielectron asymmetries is measured as well. No statistically significant deviations from standard model predictions are observed. The measurements are used to set limits on the presence of additional gauge bosons. For a Z′ boson in the sequential standard model the observed (expected) 95% confidence level lower limit on the Z′ mass is 4.4 TeV (3.7 TeV).
勘误： U(1)B3-L2documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage
DOI：
--
发表时间：
2021
期刊：
The European Physical Journal C
影响因子：
--
作者：
B. Allanach
通讯作者：
B. Allanach
光子吸收与非弹性电子散射的时空现象☆
DOI：
--
发表时间：
1972
期刊：
影响因子：
--
作者：
A. Suri;D. Yennie
通讯作者：
D. Yennie