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arXiv 1012.0799hep-ex
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sqrt(s)= 7 TeV pp碰撞孤立瞬发光子产生截面的测量

Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at sqrt(s) = 7 TeV

CMS Collaboration

摘要:

利用LHC上CMS探测器记录的数据,测量了在sqrt(s)=7 TeV的pp碰撞中孤立瞬发光子的微分截面与光子横能E_T-γ的函数关系.该数据样本对应于2.9个倒数皮巴的积分亮度。光子的赝快度必须为|eta_gamma| <1.45 and E_T-gamma >21 GeV,覆盖运动学区域0.006 &lt; x_T &lt; 0.086。测量的截面与次-首阶微扰QCD计算结果一致。

英文摘要:

The differential cross section for the inclusive production of isolated prompt photons has been measured as a function of the photon transverse energy E_T-gamma in pp collisions at sqrt(s)=7 TeV using data recorded by the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.9 inverse picobarns. Photons are required to have a pseudorapidity |eta_gamma|<1.45 and E_T-gamma > 21 GeV, covering the kinematic region 0.006 < x_T < 0.086. The measured cross section is found to be in agreement with next-to-leading-order perturbative QCD calculations.

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