Measurements of Higgs boson production cross-sections in the H ? ?+?? decay channel in pp collisions at s?s = 13 TeV with the ATLAS detector

Abstract

Measurements of the production cross-sections of the Standard Model (SM) Higgs boson (H) decaying into a pair of ?-leptons are presented. The measurements use data collected with the ATLAS detector from pp collisions produced at the Large Hadron Collider at a centre-of-mass energy of s? = 13 TeV, corresponding to an integrated luminosity of 139 fb?1. Leptonic (? ? ?????) and hadronic (? ? hadrons ??) decays of the ?-lepton are considered. All measurements account for the branching ratio of H ? ?? and are performed with a requirement |yH| < 2.5, where yH is the true Higgs boson rapidity. The cross-section of the pp ? H ? ?? process is measured to be 2.94 ± 0.21(stat)+0.37?0.32(syst) pb, in agreement with the SM prediction of 3.17 ± 0.09 pb. Inclusive cross-sections are determined separately for the four dominant production modes: 2.65 ± 0.41(stat)+0.91?0.67(syst) pb for gluon-gluon fusion, 0.197 ± 0.028(stat)+0.032?0.026(syst) pb for vector-boson fusion, 0.115 ± 0.058(stat)+0.042?0.040(syst) pb for vector-boson associated production, and 0.033 ± 0.031(stat)+0.022?0.017(syst) pb for top-quark pair associated production. Measurements in exclusive regions of the phase space, using the simplified template cross-section framework, are also performed. All results are in agreement with the SM predictions.