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首页> 外文期刊>The European physical journal, C. Particles and fields >Measurement of the inclusive jet cross-section in pp collisions at √s = 2.76 TeV and comparison to the inclusive jet cross-section at √s = 7 TeV using the ATLAS detector
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Measurement of the inclusive jet cross-section in pp collisions at √s = 2.76 TeV and comparison to the inclusive jet cross-section at √s = 7 TeV using the ATLAS detector

机译：在pps碰撞下在√s= 2.76 TeV时测量包含射流的横截面，并使用ATLAS检测器与在√s= 7 TeV时包含在内的射流横截面进行比较

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The inclusive jet cross-section has been measured in proton-proton collisions at √s = 2.76 TeV in a dataset corresponding to an integrated luminosity of 0.20 pb~(-1) collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-k_t algorithm with two radius parameters of 0.4 and 0.6. The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum pT and jet rapidity y, covering a range of 20≤p_T<430 GeV and {pipe}y{pipe}<4.4. The ratio of the cross-section to the inclusive jet cross-section measurement at √s = 7 TeV, published by the ATLAS Collaboration, is calculated as a function of both transverse momentum and the dimensionless quantity x_T = 2 p_T/√s, in bins of jet rapidity. The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements. Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation. Furthermore, the ATLAS jet cross-section measurements at √s = 2.76 TeV and √s = 7 TeV are analysed within a framework of next-to-leading order perturbative QCD calculations to determine parton distribution functions of the proton, taking into account the correlations between the measurements.
机译：包含在内的射流横截面是在√s= 2.76 TeV的质子-质子碰撞中测量的，该数据集中的数据对应于2011年在大型强子对撞机上由ATLAS探测器收集的0.20 pb〜（-1）的综合光度。使用具有两个半径参数0.4和0.6的anti-k_t算法来识别。包含性射流双微分截面表示为射流横向动量pT和射流速度y的函数，涵盖范围20≤p_T<430 GeV和{pipe} y {pipe} <4.4。由ATLAS协作组织发布的√s= 7 TeV处的横截面与包含射流横截面的比值是横向动量和无量纲量x_T = 2 p_T /√s的函数，在喷气速度的垃圾箱。由于消除了两次测量中的相关不确定性，因此比率的系统不确定性显着降低。将结果与由针对非扰动效应校正的下一阶扰动QCD计算和下一阶蒙特卡洛模拟的预测进行比较。此外，在次要阶次扰动QCD计算的框架内分析了√s= 2.76 TeV和√s= 7 TeV的ATLAS射流截面测量结果，并考虑了相关性，从而确定了质子的Parton分布函数在测量之间。

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