Measurement of differential and integrated fiducial cross sections for Higgs boson production in the four-lepton decay channel in pp collisions at √s = 7 and 8 TeV

Abstract

: Integrated fiducial cross sections for the production of four leptons via the H → 4` decays (` = e, µ) are measured in pp collisions at √ s = 7 and 8 TeV. Measurements are performed with data corresponding to integrated luminosities of 5.1 fb−1 at 7 TeV, and 19.7 fb−1 at 8 TeV, collected with the CMS experiment at the LHC. Differential cross sections are measured using the 8 TeV data, and are determined as functions of the transverse momentum and rapidity of the four-lepton system, accompanying jet multiplicity, transverse momentum of the leading jet, and difference in rapidity between the Higgs boson candidate and the leading jet. A measurement of the Z → 4` cross section, and its ratio to the H → 4` cross section is also performed. All cross sections are measured within a fiducial phase space defined by the requirements on lepton kinematics and event topology. The integrated H → 4` fiducial cross section is measured to be 0.56+0.67 −0.44(stat) +0.21 −0.06(syst) fb at 7 TeV, and 1.11+0.41 −0.35(stat) +0.14 −0.10(syst) fb at 8 TeV. The measurements are found to be compatible with theoretical calculations based on the standard model.