Search for a right-handed W boson and a heavy neutrino in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
JHEP 04 (2022) 047, 2022.

Abstract (data abstract)
A search for a right-handed $\mathrm{W}$ boson ($\mathrm{W_R}$) and a heavy neutrino ($\mathrm{N}$), in a final state consisting of two same--flavor leptons ($\mathrm{e}\mathrm{e}$ or $\mu\mu$) and two quarks, is presented. The search is performed with the CMS experiment at the CERN LHC using a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 137 $\mathrm{fb}^{-1}$. The search covers both regions of phase space where the decay products of the heavy neutrino are merged into a single large-area jet and where the decay products are well separated. The expected signal is characterized by an excess in the invariant mass distribution of the final-state objects and no significant excess over the standard model background expectations is observed. The observations are interpreted as upper limits on the product of $\mathrm{W_R}$ production cross sections and branching fractions assuming that couplings are identical to those of the standard model $\mathrm{W}$ boson. For $m_{\mathrm{N}}=1/2~m_{\mathrm{W_R}}$ ($m_{\mathrm{N}}=200$ GeV), the mass of the $\mathrm{W_R}$ is excluded at 95\% confidence level up to 4.7 (4.8) and 5.0 (5.4) TeV for the electron and muon channels, respectively. The maximum observed global significance is in the electron channel and correpsonds to 2.78 standard deviations for a signal with $(m_{\mathrm{W_R}}, m_{\mathrm{N}}) = (6.0, 0.8)$ TeV. This analysis provides the most stringent limits on the $\mathrm{W_R}$ mass to date.

  • Invariant mass distribution in the resolved DY CR e channel

    Data from Figure 3, top left.

    10.17182/hepdata.114866.v1/t1

    The $m_{lljj}$ distribution in the resolved DY control region, electron channel.

  • Invariant mass distribution in the resolved DY CR muon channel

    Data from Figure 4, top.

    10.17182/hepdata.114866.v1/t2

    The $m_{lljj}$ distribution in the resolved DY control region, muon channel.

  • Invariant mass distribution in the boosted DY CR e channel

    Data from Figure 3, bottom left.

    10.17182/hepdata.114866.v1/t3

    The $m_{lJ}$ distribution in the boosted DY control region, electron channel.

  • Invariant mass distribution in the boosted DY CR muon channel

    Data from Figure 3, bottom right.

    10.17182/hepdata.114866.v1/t4

    The $m_{lJ}$ distribution in the boosted DY control region, muon channel.

  • Invariant mass distribution in the resolved flavor CR

    Data from Figure 4, top.

    10.17182/hepdata.114866.v1/t5

    The $m_{lljj}$ distribution in the resolved flavor control region.

  • Invariant mass distribution in the boosted flavor CR with e jet

    Data from Figure 4, bottom left.

    10.17182/hepdata.114866.v1/t6

    The $m_{lJ}$ distribution in the boosted flavor control region, with electron jet.

  • Invariant mass distribution in the boosted flavor CR muon jet

    Data from Figure 4, bottom right.

    10.17182/hepdata.114866.v1/t7

    The $m_{lJ}$ distribution in the boosted flavor control region, with muon jet

  • Invariant mass distribution in the resolved SR electron channel

    Data from Figure 5, top left.

    10.17182/hepdata.114866.v1/t8

    The $m_{lljj}$ distribution in the resolved signal region, electron channel.

  • Invariant mass distribution in the resolved SR muon channel

    Data from Figure 5, top left.

    10.17182/hepdata.114866.v1/t9

    The $m_{lljj}$ distribution in the resolved signal region, muon channel.

  • Invariant mass distribution in the boosted SR electron channel

    Data from Figure 5, bottom left.

    10.17182/hepdata.114866.v1/t10

    The $m_{lJ}$ distribution in the boosted signal region, electron channel.

  • Invariant mass distribution in the boosted SR muon channel

    Data from Figure 5, bottom right.

    10.17182/hepdata.114866.v1/t11

    The $m_{lJ}$ distribution in the boosted signal region, muon channel.

  • Cross section limits vs WR mass ($m_{N}=0.5m_{WR}$,e channel)

    Data from Figure 6, top left.

    10.17182/hepdata.114866.v1/t12

    The expected and observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow...

  • Cross section limits vs WR mass($m_{N}=0.5m_{WR}$,$\mu$ channel)

    Data from Figure 6, top left.

    10.17182/hepdata.114866.v1/t13

    The expected and observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow...

  • Cross section limits vs WR mass ($m_{N}=200$ GeV, e channel)

    Data from Figure 6, bottom left.

    10.17182/hepdata.114866.v1/t14

    The expected and observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow...

  • Cross section limits vs WR mass ($m_{N}=200$ GeV, $\mu$ channel)

    Data from Figure 6, bottom left.

    10.17182/hepdata.114866.v1/t15

    The expected and observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow...

  • Cross section limits vs WR and N mass (e channel)

    Data from Figure 7, left.

    10.17182/hepdata.114866.v1/t16

    The observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow W_{R}) \mathcal{B}(W_{R}...

  • Cross section limits vs WR and N mass ($\mu$ channel)

    Data from Figure 7, left.

    10.17182/hepdata.114866.v1/t17

    The observed $95\%$ CL upper limits on the production cross section times the branching fraction $\sigma (\mathrm{p}\mathrm{p} \rightarrow W_{R}) \mathcal{B}(W_{R}...

  • Relative unertainties on total yields

    Data from Table 1.

    10.17182/hepdata.114866.v1/t18

    Relative uncertainties in the total yields of the signal and background predictions.

  • Background Covariance Matrix (e channel)

    Supplementary material

    10.17182/hepdata.114866.v1/t19

    Covariance matrix for all bins used in the background-only fit of the electron channel of this analysis. There are 243...

  • Background Covariance Matrix (mu channel)

    Supplementary material

    10.17182/hepdata.114866.v1/t20

    Covariance matrix for all bins used in the background-only fit of the muon channel of this analysis. There are 243...

  • Cut-flow table mN=0.2TeV, boosted, e channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t21

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, e channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t22

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, e channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t23

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, e channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t24

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table mN=0.2TeV, boosted, mu channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t25

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, mu channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t26

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, mu channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t27

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, mu channel, 2016

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t28

    Predicted signal yields for the 2016 data-taking period, corresponding to $35.9\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table mN=0.2TeV, boosted, e channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t29

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, e channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t30

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, e channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t31

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, e channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t32

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table mN=0.2TeV, boosted, mu channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t33

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, mu channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t34

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, mu channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t35

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, mu channel, 2017

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t36

    Predicted signal yields for the 2017 data-taking period, corresponding to $41.5\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table mN=0.2TeV, boosted, e channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t37

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, e channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t38

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, e channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t39

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, e channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t40

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table mN=0.2TeV, boosted, mu channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t41

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(3.0,1.4)TeV, resolved, mu channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t42

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(4.0,2.0)TeV, resolved, mu channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t43

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • Cut-flow table (mWR,mN)=(5.0,3.0)TeV, resolved, mu channel, 2018

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t44

    Predicted signal yields for the 2018 data-taking period, corresponding to $59.7\,\text{fb}^{-1}$, after the application of each search requirement for the...

  • NLO cross sections

    Additional material for EXO-20-002.

    10.17182/hepdata.114866.v1/t45

    Cross sections calculated to next-to-leading (NLO) accuracy

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