Precise top quark cross-section results at LHC

5th International Workshop on Top Quark Physics

Andrea, J.^1

not available, 23 rue du Loess, 67037 Strasbourg cedex 2, France^1

关键词: CMS detectors;    Combined measurements;    Dilepton events;    Dileptons;    Measurements of;    Proton proton collisions;    Top quarks;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/452/1/012025/pdf
DOI  :  10.1088/1742-6596/452/1/012025

来源: IOP

【 摘 要 】

The measurements of the inclusive t cross section is presented for proton-proton collisions recorded at = 7 and 8 TeV by the ATLAS and the CMS experiments using the lepton+jets and the dilepton events. The most precise single measurement at 7 TeV is σt 161.9 ± 2.5(stat.)+5.1-5.0(syst.)±3.6(lumi.) pb, using a luminosity of 2.3 fb-1. The measurements from the two experiments are also combined to reach higher precision. With a luminosity of about 1 fb-1, the combined cross-section is σt 173.3±2.3(stat.)±9.8(syst.) pb. At = 8 TeV, σt is measured in the lepton+jets and dilepton channels with the CMS detector and the corresponding combined measurement is σt 227 ± 3(stat.)±11(syst.)±10(lumi.) pb.