用LHC上的ATLAS探测器测量在sqrt{s}= 7 PDKEEPAAA时pp碰撞中的W γ和Z γ产生
Measurements of Wgamma and Zgamma production in pp collisions at sqrt{s}= 7 TeV with the ATLAS detector at the LHC
摘要：
在sqrt{s} = 7 TeV的pp碰撞中测量了与高能光子相关联的W或Z玻色子产生的积分和差分基准截面。分析使用的数据样本的积分亮度为4.6 fb^{-1}收集的ATLAS探测器在2011年大型强子对撞机数据采集期间。事件是使用W和Z玻色子的轻子衰变（W（e nu，mu nu）和Z（e+ e-，mu+ mu-，nu nubar））选择的，需要相关的孤立光子。这些数据被用来测试标准模型的电弱部分，并寻找新现象的证据。测量用于探测异常的WWgamma，ZZgamma和Zgamma三重规范玻色子耦合，并寻找产生衰减到Zgamma和Wgamma的矢量共振。没有偏离标准模型的预测观察和限制放置在异常的三规范玻色子耦合和新的矢量介子共振的生产。
英文摘要：
The integrated and differential fiducial cross sections for the production of a W or Z boson in association with a high-energy photon are measured using pp collisions at sqrt{s} = 7 TeV. The analyses use a data sample with an integrated luminosity of 4.6 fb^{-1} collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the W and Z bosons (W(e nu,mu nu) and Z(e+ e-, mu+ mu-, nu nubar)) with the requirement of an associated isolated photon. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The measurements are used to probe the anomalous WWgamma, ZZgamma and Zgammagamma triple-gauge-boson couplings and to search for the production of vector resonances decaying to Zgamma and Wgamma. No deviations from Standard Model predictions are observed and limits are placed on anomalous triple-gauge-boson couplings and on the production of new vector meson resonances.
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