Measurement of fiducial differential cross sections of gluon-fusion production of Higgs bosons decaying to $W{W}^{\ast }\to e\nu \mu \nu$ with the ATLAS detector at $\sqrt{s}=8$ TeV

Abstract

This paper describes a measurement of fiducial and differential cross sections of gluon-fusion Higgs boson production in the $H\to W{W}^{\ast }\to e\nu \mu \nu$ channel, using 20.3 fb${}^{-1}$ of proton-proton collision data. The data were produced at a centre-of-mass energy of $\sqrt{s}=8$ TeV at the CERN Large Hadron Collider and recorded by the ATLAS detector in 2012. Cross sections are measured from the observed $H\to W{W}^{\ast }\to e\nu \mu \nu$ signal yield in categories distinguished by the number of associated jets. The total cross section is measured in a fiducial region defined by the kinematic properties of the charged leptons and neutrinos. Differential cross sections are reported as a function of the number of jets, the Higgs boson transverse momentum, the dilepton rapidity, and the transverse momentum of the leading jet. The jet-veto efficiency, or fraction of events with no jets above a given transverse momentum threshold, is also reported. All measurements are compared to QCD predictions from Monte Carlo generators and fixed-order calculations, and are in agreement with the Standard Model predictions.

44 pages plus author list + cover pages (61 pages total), 8 figures, 20 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2015-04/

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