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Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV

The CMS collaboration
JHEP, 2018

Abstract (data abstract)
A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 ($X_{5/3}$) is performed in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 $fb^{-1}$. The $X_{5/3}$ quark is assumed always to decay into a top quark and a W boson. Both the right-handed and left-handed $X_{5/3}$ couplings to the W boson are considered. Final states with either a pair of same-sign leptons or a single lepton are studied. No significant excess of events is observed above the expected standard model background. Lower limits at 95% confidence level on the $X_{5/3}$ quark mass are set at 1.33 and 1.30 TeV respectively for the case of right-handed and left-handed couplings to W bosons in a combination of the same-sign dilepton and single-lepton final states.

  • Table 1

    Data from Table 1.

    10.17182/hepdata.85767.v1/t1

    Summary of yields from simulated prompt same-sign dilepton (SSP MC), same-sign nonprompt (Nonprompt), and opposite-sign prompt (ChargeMisID) backgrounds after the...

  • Figure 4a

    Data from Figure 4 (upper left), located on page 12.

    10.17182/hepdata.85767.v1/t2

    Distributions of $\min[M(\ell,\mathrm{b})]$ in the $\mathrm{t\overline{t}}$ control region, for 1 b-tagged jet category. Example signal distributions are also shown. The...

  • Figure 4b

    Data from Figure 4 (upper right), located on page 12.

    10.17182/hepdata.85767.v1/t3

    Distributions of $\min[M(\ell,\mathrm{b})]$ in the $\mathrm{t\overline{t}}$ control region, for 2 or more b-tagged jet category. Example signal distributions are also...

  • Figure 4c

    Data from Figure 4 (lower left), located on page 12.

    10.17182/hepdata.85767.v1/t4

    Distributions of $\min[M(\ell,\mathrm{j})]$ in the W+jets control region, for 0 W-tagged jet category. Example signal distributions are also shown. The...

  • Figure 4d

    Data from Figure 4 (lower right), located on page 12.

    10.17182/hepdata.85767.v1/t5

    Distributions of $\min[M(\ell,\mathrm{j})]$ in the W+jets control region, for 1 or more W-tagged jet category. Example signal distributions are also...

  • Figure 5a

    Data from Figure 5 (upper left), located on page 14.

    10.17182/hepdata.85767.v1/t6

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 0 t-tagged jets, 0 W-tagged jets, and 1 b-tagged jets for the combined electron...

  • Figure 5b

    Data from Figure 5 (upper right), located on page 14.

    10.17182/hepdata.85767.v1/t7

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 0 t-tagged jets, 0 W-tagged jets, and 2 or more b-tagged jets for the...

  • Figure 5c

    Data from Figure 5 (lower left), located on page 14.

    10.17182/hepdata.85767.v1/t8

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 0 t-tagged jets, 1 or more W-tagged jets, and 1 b-tagged jets for the...

  • Figure 5d

    Data from Figure 5 (lower right), located on page 14.

    10.17182/hepdata.85767.v1/t9

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 0 t-tagged jets, 1 or more W-tagged jets, and 2 or more b-tagged jets...

  • Figure 6a

    Data from Figure 6 (upper left), located on page 15.

    10.17182/hepdata.85767.v1/t10

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 1 or more t-tagged jets, 0 W-tagged jets, and 1 b-tagged jets for the...

  • Figure 6b

    Data from Figure 6 (upper right), located on page 15.

    10.17182/hepdata.85767.v1/t11

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 1 or more t-tagged jets, 0 W-tagged jets, and 2 or more b-tagged jets...

  • Figure 6c

    Data from Figure 6 (lower left), located on page 15.

    10.17182/hepdata.85767.v1/t12

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 1 or more t-tagged jets, 1 or more W-tagged jets, and 1 b-tagged jets...

  • Figure 6d

    Data from Figure 6 (lower right), located on page 15.

    10.17182/hepdata.85767.v1/t13

    Distributions of $\min[M(\ell,\mathrm{b})]$ in events with 1 or more t-tagged jets, 1 or more W-tagged jets, and 2 or more...

  • Figure 7a

    Data from Figure 7 (upper left), located on page 18.

    10.17182/hepdata.85767.v1/t14

    Expected and observed limits at 95% CL for an LH $X_{5/3}$ after combining all categories for the same-sign dilepton final...

  • Figure 7b

    Data from Figure 7 (upper right), located on page 18.

    10.17182/hepdata.85767.v1/t15

    Expected and observed limits at 95% CL for an RH $X_{5/3}$ after combining all categories for the same-sign dilepton final...

  • Figure 7c

    Data from Figure 7 (lower left), located on page 18.

    10.17182/hepdata.85767.v1/t16

    Expected and observed limits at 95% CL for an LH $X_{5/3}$ after combining all categories for the single-lepton final state....

  • Figure 7d

    Data from Figure 7 (lower right), located on page 18.

    10.17182/hepdata.85767.v1/t17

    Expected and observed limits at 95% CL for an RH $X_{5/3}$ after combining all categories for the single-lepton final state....

  • Figure 8a

    Data from Figure 8 (left), located on page 19.

    10.17182/hepdata.85767.v1/t18

    Expected and observed limits at 95% CL for an LH $X_{5/3}$ after combining the same-sign dilepton and single-lepton final states....

  • Figure 8b

    Data from Figure 8 (right), located on page 19.

    10.17182/hepdata.85767.v1/t19

    Expected and observed limits at 95% CL for an RH $X_{5/3}$ after combining the same-sign dilepton and single-lepton final states....

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