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arXiv 1012.4389hep-ex
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用ATLAS探测器测量sqrt(s)= 7PDKEEPAAAA pp碰撞中的孤立瞬发光子截面

Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

The ATLAS Collaboration

摘要:

本文测量了质心能量sqrt(s)= 7TeV的pp碰撞中孤立瞬发光子的包容性产生的截面。在15 <E_T <100 GeV的横向能量范围内,测量的赝快度范围为|eta| <1.37和1.52 <|eta| <1.81。这些结果是基于大型强子对撞机上ATLAS探测器收集的880 nb-1的积分亮度。光子候选者的识别结合信息从量热计和内部跟踪器。在选定的样品中的残余背景估计从数据的基础上观察到的分布的横向隔离能量在一个狭窄的圆锥周围的光子候选人。结果进行了比较,从下到领先的阶微扰QCD计算的预测。

英文摘要:

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a centre-of-mass energy sqrt(s) = 7TeV is presented. The measurement covers the pseudorapidity ranges |eta|<1.37 and 1.52<|eta|<1.81 in the transverse energy range 15 < E_T <100 GeV. The results are based on an integrated luminosity of 880 nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading order perturbative QCD calculations.

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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