Measurement of the fraction of top quark pair events produced via gluon-gluon fusion at the Tevatron in lepton+jets final states

الأصل · EN

We report a measurement of the fraction of top quark pair events produced via gluon-gluon fusion in pp collisions at √s = 1.96 TeV in lepton+jets final states using the full RunII data set corresponding to 9.7 fb⁻¹ of integrated luminosity collected by the DØ experiment. We utilize a boosted decision tree to distinguish top quark pair events produced by qq annihilation and gg fusion. We perform a template fit to extract the tt production fraction via gg fusion and find fgg = 0.096 ± 0.039 (stat.) ⁺⁰.⁰⁷⁷₋₀.₀₆₂ (syst.).