Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at s=13 TeV
Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at s=13 TeV
复制标题
与 s=13 TeV 质子-质子碰撞中的两个射流相关的偏振同号 W 玻色子对的产生截面测量
DOI：
10.1016/j.physletb.2020.136018
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发表时间：
2021
影响因子：
4.4
通讯作者：
Krammer, N.
中科院分区：
文献类型：
--
作者：
Sirunyan, A.M.;Tumasyan, A.;Adam, W.;Bergauer, T.;Dragicevic, M.;Erö, J.;Escalante Del Valle, A.;Frühwirth, R.;Jeitler, M.;Krammer, N.
报道了质子-质子碰撞中极化同号W±W±玻色子对产生截面的首次测量结果。这些测量是基于在LHC的CMS探测器收集的数据样本，质心能量为13 TeV，对应于137 fb− 1的积分光度。事件的选择需要两个相同符号的轻子，电子或μ子，适度的横向动量丢失，以及两个具有大快度分离和大双喷流质量的喷流，以增强相同符号的W±W±散射事件的贡献。对于纵向极化的同号W±W±玻色子对，在产生截面上设定的观测（预期）95%置信水平上限为1.17（0.88）fbis。测量了同号W±W±玻色子对的电弱产生，其中至少有一个W玻色子是纵向极化的，观察到的（预期）显著性为2.3（3.1）个标准差。
The first measurements of production cross sections of polarized same-sign W±W±boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb− 1. Events are selected by requiring exactly two same-sign leptons, electrons or muons, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass to enhance the contribution of same-sign W±W±scattering events. An observed (expected) 95% confidence level upper limit of 1.17 (0.88) fbis set on the production cross section for longitudinally polarized same-sign W±W±boson pairs. The electroweak production of same-sign W±W±boson pairs with at least one of the W bosons longitudinally polarized is measured with an observed (expected) significance of 2.3 (3.1) standard deviations.