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arXiv 1207.4583hep-ex
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用ATLAS测量包含射流产生量及对PDF的约束

Inclusive Jet Production Measured with ATLAS and Constraints on PDFs

Bogdan Malaescu

摘要:

在LHC上用ATLAS探测器测量了质心能量为7 TeV的质子-质子碰撞中包含喷流和双喷流的双微分截面。截面的测量使用射流与反kt算法聚类。在喷流快度范围|y| < 4.4内进行了测量,喷流横动量从20 GeV到1.5 TeV,双喷流不变质量从70 GeV到5 TeV。的数据进行比较,预期的基础上下一个领先的顺序QCD计算校正非微扰效应,以及下一个领先的顺序蒙特卡罗预测。数据测试的理论在一个新的运动学制度,并提供灵敏度部分子分布函数在一个地区,他们目前没有得到很好的约束。

英文摘要:

Inclusive jet and dijet double-differential cross sections have been measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The cross sections were measured using jets clustered with the anti-kt algorithm. The measurements are performed in the jet rapidity range |y| < 4.4, covering jet transverse momenta from 20 GeV to 1.5 TeV and dijet invariant masses from 70 GeV to 5 TeV. The data are compared to expectations based on next-to-leading order QCD calculations corrected for non-perturbative effects, as well as to next-to-leading order Monte Carlo predictions. The data test the theory in a new kinematic regime, and provide sensitivity to parton distribution functions in a region where they are currently not well constrained.

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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