Search for a heavy charged boson in events with a charged lepton and missing transverse momentum from $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2019

Abstract (data abstract)
CERN-LHC. A search for a heavy charged-boson resonance decaying into a charged lepton (electron or muon) and a neutrino is reported. A data sample of 139 fb$^{-1}$ of proton-proton collisions at $\sqrt{s} = 13$ TeV collected with the ATLAS detector at the LHC during 2015-2018 is used in the search. The observed transverse mass distribution computed from the lepton and missing transverse momenta is consistent with the distribution expected from the Standard Model, and upper limits on the cross section for $pp \to W^\prime \to l\nu$ are extracted ($l = e$ or $\mu$). These vary between 1.3 pb and 0.05 fb depending on the resonance mass in the range between 0.15 and 7.0 TeV at 95% confidence level for the electron and muon channels combined. Gauge bosons with a mass below 6.0 TeV and 5.1 TeV are excluded in the electron and muon channels, respectively, in a model with a resonance that has couplings to fermions identical to those of the Standard Model $W$ boson. Cross-section limits are also provided for resonances with several fixed $\Gamma / m$ values in the range between 1% and 15%. Model-independent limits are derived in single-bin signal regions defined by a varying minimum transverse mass threshold. The resulting visible cross-section upper limits range between 4.6 (15) pb and 22 (22) ab as the threshold increases from 130 (110) GeV to 5.1 (5.1) TeV in the electron (muon) channel.

  • Table 1

    Figure 1 (a) in paper

    10.17182/hepdata.90193.v1/t1

    Transverse mass distribution for events satisfying all selection criteria in the electron channel.

  • Table 2

    Figure 1 (b) in paper

    10.17182/hepdata.90193.v1/t2

    Transverse mass distribution for events satisfying all selection criteria in the muon channel.

  • Table 3

    Figure 2 (a) in paper

    10.17182/hepdata.90193.v1/t3

    Upper limits at the 95% CL on the cross section for SSM $W^\prime$ production and decay to the electron+neutrino channel...

  • Table 4

    Figure 2 (b) in paper

    10.17182/hepdata.90193.v1/t4

    Upper limits at the 95% CL on the cross section for SSM $W^\prime$ production and decay to the muon+neutrino channel...

  • Table 5

    Figure 2 (c) in paper

    10.17182/hepdata.90193.v1/t5

    Combined (electron and muon channels) upper limits at the 95% CL on the cross section for SSM $W^\prime$ production and...

  • Table 6

    Figure 3 (a) in paper

    10.17182/hepdata.90193.v1/t6

    Observed upper limits at the 95% CL on the cross section for generic $W^\prime$ production and decay to the electron+neutrino...

  • Table 7

    Figure 3 (b) in paper

    10.17182/hepdata.90193.v1/t7

    Observed upper limits at the 95% CL on the cross section for generic $W^\prime$ production and decay to the muon+neutrino...

  • Table 8

    Figure 3 (c) in paper

    10.17182/hepdata.90193.v1/t8

    Combined (electron and muon channels) observed upper limits at the 95% CL on the cross section for generic $W^\prime$ production...

  • Table 9

    Figure 4 (a) in paper

    10.17182/hepdata.90193.v1/t9

    Observed upper limits at the 95% CL on the visible cross section in the electron+neutrino channel as a function of...

  • Table 10

    Figure 4 (b) in paper

    10.17182/hepdata.90193.v1/t10

    Observed upper limits at the 95% CL on the visible cross section in the muon+neutrino channel as a function of...

  • Table 11

    Figure 1 in auxiliary material

    10.17182/hepdata.90193.v1/t11

    Product of acceptance and efficiency for the electron and muon selections as a function of the $W^\prime$ pole mass.

  • Table 12

    Figure 5 (a) in auxiliary material

    10.17182/hepdata.90193.v1/t12

    Expected upper limits at the 95% CL on the cross section for generic $W^\prime$ production and decay to the electron+neutrino...

  • Table 13

    Figure 5 (b) in auxiliary material

    10.17182/hepdata.90193.v1/t13

    Expected upper limits at the 95% CL on the cross section for generic $W^\prime$ production and decay to the muon+neutrino...

  • Table 14

    Figure 5 (c) in auxiliary material

    10.17182/hepdata.90193.v1/t14

    Combined (electron and muon channels) expected upper limits at the 95% CL on the cross section for generic $W^\prime$ production...

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