Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
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DOI：
10.1140/epjc/s10052-010-1512-2
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发表时间：
2011-02-01
影响因子：
4.4
通讯作者：
Zutshi, V.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abbott, B.;Zutshi, V.
喷流截面已被测量的第一次质子-质子碰撞在质心能量为7 TeV的使用ATLAS探测器。该测量使用大型强子对撞机记录的17 nb（-1）的积分光度。anti-k（t）算法用于识别射流，具有两个射流分辨率参数，R = 0.4和0.6。占主导地位的不确定性来自喷流的能量尺度，它被确定为在7%的中央喷流超过60 GeV的横向动量。包含单射流微分截面作为射流横向动量和速度的函数。双射流截面作为双射流质量和角度变量chi的函数。结果进行了比较，预期的基础上下一个领先阶QCD，同意的数据，提供了一个新的运动学制度的理论验证。
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb(-1) recorded at the Large Hadron Collider. The anti-k(t) algorithm is used to identify jets, with two jet resolution parameters, R = 0.4 and 0.6. The dominant uncertainty comes from the jet energy scale, which is determined to within 7% for central jets above 60 GeV transverse momentum. Inclusive single-jet differential cross sections are presented as functions of jet transverse momentum and rapidity. Dijet cross sections are presented as functions of dijet mass and the angular variable chi. The results are compared to expectations based on next-to-leading-order QCD, which agree with the data, providing a validation of the theory in a new kinematic regime.