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Measurement of the inclusive Formula Presented production cross section in the lepton+jets channel in pp collisions at Formula Presented with the ATLAS detector using support vector machines
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Measurement of the inclusive Formula Presented production cross section in the lepton+jets channel in pp collisions at Formula Presented with the ATLAS detector using support vector machines

P. Jackson, J.L. Oliver, A. Petridis, A. Qureshi, A.S. Sharma, M.J. White, V.M.M. Cairo, V. Jain, S.P. Swift, D.M. Gingrich, …
Physical Review D, 卷.108(3), 032014
08/2023

摘要

Nuclear and High Energy Physics
A measurement of the top quark pair-production cross section in the lepton + jets decay channel is presented. It is based on 4.6 fb - 1 of s = 7 TeV p p collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. A three-class, multidimensional event classifier based on support vector machines is used to differentiate t t ¯ events from backgrounds. The t t ¯ production cross section is found to be σ t t ¯ = 168.5 ± 0.7 ( stat ) - 5.9 + 6.2 ( syst ) - 3.2 + 3.4 ( lumi ) pb . The result is consistent with the Standard Model prediction based on QCD calculations at next-to-next-to-leading order.

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https://doi.org/10.1103/PhysRevD.108.032014檢視
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