Studies of Z? production in association with a high-mass dijet system in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
Studies of Z? production in association with a high-mass dijet system in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
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Z的研究？
DOI：
10.1007/jhep07(2017)107
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发表时间：
2017
影响因子：
5.4
通讯作者：
Aaboud M
中科院分区：
文献类型：
--
作者：
Aaboud M
使用2012年在大型强子对撞机上使用ATLAS探测器记录的20.2 fb − 1的质子-质子碰撞数据，研究了与高质量双喷系统相关的Z玻色子和光子的产生。最终状态与光子和Z玻色子衰变成一对电子，μ子，或中微子进行了分析。在对电弱产生过程敏感性不同的两个基准区域中提取了电弱和总pp → Z γ jj截面。研究了纯电弱产生对矢量玻色子散射过程VV → Z γ敏感的相空间区域中矢量玻色子的四次耦合。没有观察到与标准模型预测的偏差，并且使用有效场论对由高维算子参数化的异常耦合进行了约束。
The production of a Z boson and a photon in association with a high-mass dijet system is studied using 20.2 fb− 1 of proton-proton collision data at a centre-of-mass energy ofTeV recorded with the ATLAS detector in 2012 at the Large Hadron Collider. Final states with a photon and a Z boson decaying into a pair of either electrons, muons, or neutrinos are analysed. Electroweak and total pp→ Zγjj cross-sections are extracted in two fiducial regions with different sensitivities to electroweak production processes. Quartic couplings of vector bosons are studied in regions of phase space with an enhanced contribution from pure electroweak production, sensitive to vector-boson scattering processes VV→ Zγ. No deviations from Standard Model predictions are observed and constraints are placed on anomalous couplings parameterized by higher-dimensional operators using effective field theory.