DOI: 10.17182/hepdata.89176.v1/t3
title: "Table 3" of "Search for the production of W$^\pm$W$^\pm$W$^\mp$ events at $\sqrt{s} =$ 13 TeV"

description: Summary of typical systematic uncertainties of estimated background contributions.
description: CERN-LHC. A search for the production of events containing three W bosons predicted by the standard model is reported. The search is based on a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the CMS experiment at the CERN LHC and corresponding to a total integrated luminosity of 35.9 $\mathrm{fb}^{−1}$. The search is performed in final states with three leptons (electrons or muons), or with two same-charge leptons plus two jets. The observed (expected) significance of the signal for $\mathrm{W}^{\pm}\mathrm{W}^{\pm}\mathrm{W}^{\mp}$ production is 0.60 (1.78) standard deviations, and the ratio of the measured signal yield to that expected from the standard model is $0.34^{+0.62}_{−0.34}. Limits are placed on three anomalous quartic gauge couplings and on the production of massive axion-like particles. 
The two equally charged (SS) channel fiducial region is defined as
- exactly 2e, 2mu or 1e1mu with both leptons having the same charge
- ptLepton &gt; 25 GeV
- |etaLepton| &lt; 2.4
- the invariant mass of the two leptons has to be &gt;40 (30) GeV for 2e or 2mu (emu) and |mll - mZ| &gt; 10 GeV for 2e
- at least two jets, none of them b tagged
- ptJet &gt; 30 GeV
- |etaJet| &lt; 2.5
- The invariant mass of the two highest pt jets has to be mJJ &lt; 400 GeV 
- The DeltaEta of the two highest pt jets has to be &lt;1.5
- The missing transverse momentum has to be &gt; 60 GeV, except for the 2mu region if the invariant mass of the two jets closest in DeltaR is between 65 and 90 GeV
- The maximum of the transverse masses constructed out of the momenta of a charged lepton and the missing transverse momentum has to be &gt;90 GeV for 1e1mu.
- For the interpretation in anomalous quartic gauge couplings, the selection on the invariant mass of the two highest pt jets is not applied, but we select ST &gt; 2 TeV, where ST is the scalar sum of the transverse momenta of all leptons, jets, and the missing transverse momentum
The three charged lepton (3l) channel fiducial region is defined as
- 3e, 2e1mu, 1e2mu or 3mu with the sum of the three lepton charges being 1 or -1
- ptLepton &gt; 20 GeV, but one lepton has to have &gt; 25 GeV
- |etaLepton| &lt; 2.4
- the transverse momentum of the three-lepton system has to be &gt;60 GeV except if there is no same-flavor differently-charged (SFOS) lepton pair in the event
- the invariant mass of the three-lepton system has to be |mlll - mZ| &gt; 10 GeV
- the invariant mass of any SFOS lepton pair has to be &gt; 20 GeV and |mSFOS - mZ| &gt; 20 GeV
- the invariant mass of two electrons has to be |mee - mZ| &gt; 15 GeV if no SFOS lepton pair is found
- the invariant mass of two charged leptons with same flavor has to be &gt; 20 GeV if no SFOS lepton pair is found
- the angular separation in the transverse plane between the three-lepton system and the missing transverse momentum has to be &gt; 2.5
- The maximum of the transverse masses constructed out of the momenta of a charged lepton and the missing transverse momentum has to be &gt;90 GeV if no SFOS lepton pair is found.
- The the transverse masses constructed out of the momenta of charged lepton, which is not part of any SFOS lepton pair, and the missing transverse momentum has to be &gt;90 GeV if one SFOS lepton pair is found.
- the missing transverse momentum has to be &gt; 30 GeV if no SFOS lepton pair is found, &gt; 45 GeV if 1 SFOS lepton pair is found, and &gt; 55 GeV if 2 SFOS lepton pairs are found
- at most one jets, none of them b tagged
- ptJet &gt; 30 GeV
- |etaJet| &lt; 5.0
- For the interpretation in anomalous quartic gauge couplings, we select ST &gt; 1.5 TeV, where ST is the scalar sum of the transverse momenta of all leptons, jets, and the missing transverse momentum