Measurement of top quark pair production cross-section in the lepton+jets channel at root(s) = 7 TeV at the LHC with the ATLAS experiment

被引：0
作者：
Di Sipio, R. [1 ,2 ]
机构：
[1] Univ Bologna, Bologna, Italy
[2] INFN, Sez Bologna, Bologna, Italy
来源：
NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS | 2011年 / 34卷 / 06期
关键词：
D O I：
10.1393/ncc/i2011-11077-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Top quark pair production cross-section in pp collisions has been measured at a center-of-mass energy of 7TeV using 35.5 pb(-1) of data recorded in 2010 by the ATLAS experiment at the LHC. A cut-based analysis was applied to select events containing exactly one energetic charged lepton, large missing transverse energy (compatible with the presence of an undetected neutrino) and four jets of which at least one tagged as originated from a b quark. The main backgrounds, due to QCD and W+jets processes, have been evaluated directly by data, while other sources of background and the signal are described by a Monte Carlo simulation. The final result is obtained combining the electron and muon channels using a technique based on Bayes' theorem that takes into account both correlated and uncorrelated systematics.
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页码：219 / 223
页数：5
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