Search for a new heavy gauge boson resonance decaying into a lepton and missing transverse momentum in 36 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS experiment

Abstract

The results of a search for new heavy $W^{\prime }$ bosons decaying to an electron or muon and a neutrino using proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=13$ TeV are presented. The dataset was collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 36.1 fb${}^{-1}$. As no excess of events above the Standard Model prediction is observed, the results are used to set upper limits on the $W^{\prime }$ boson cross-section times branching ratio to an electron or muon and a neutrino as a function of the $W^{\prime }$ mass. Assuming a $W^{\prime }$ boson with the same couplings as the Standard Model $W$ boson, $W^{\prime }$ masses below 5.1 TeV are excluded at the 95% confidence level.

33 pages in total, author list starting page 17, 2 figures, 3 tables. Submitted to EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-06/

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