arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1108.0253hep-ex
收藏

用35 pb-1的ATLAS数据测量sqrt(s)= 7 TeV时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 using 35 pb-1 of ATLAS data

ATLAS Collaboration

摘要:

本文测量了质心能量sqrt(s)= 7 TeV的pp碰撞中孤立瞬发光子的微分截面。在45<=E_T<400 GeV的横向能量范围内,测量覆盖了赝快度范围|eta| <1.37和1.52<= |eta| <2.37。结果是基于一个积分亮度为35 pb-1,收集与ATLAS探测器在大型强子对撞机。信号光子的产率测量使用数据驱动的技术,根据观察到的强子能量分布在一个狭窄的圆锥周围的光子候选人和光子选择标准。结果与次领先阶微扰QCD计算结果进行了比较,发现在截面上的四个数量级上都很好地吻合。

英文摘要:

A measurement of the differential cross-section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy sqrt(s) = 7 TeV is presented. The measurement covers the pseudorapidity ranges |eta|<1.37 and 1.52<=|eta|<2.37 in the transverse energy range 45<=E_T<400GeV. The results are based on an integrated luminosity of 35 pb-1, collected with the ATLAS detector at the LHC. The yields of the signal photons are measured using a data-driven technique, based on the observed distribution of the hadronic energy in a narrow cone around the photon candidate and the photon selection criteria. The results are compared with next-to-leading order perturbative QCD calculations and found to be in good agreement over four orders of magnitude in cross-section.

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。

↑