Abstract (data abstract)

A search is presented for charged Higgs bosons ($\text{H}^{\pm}$) in proton-proton (pp) collision events via the $\text{pp}\to\text{(q)H}^{\pm}$ processes with $H^{\pm}\to \text{tb}$ decays. The analysis is based on the data collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 $\text{fb}^{-1}$.Charged Higgs bosons in the 200 GeV to 1 TeV mass range are searched for. The results are interpreted within the generalized two-Higgs-doublet model (g2HDM), which predicts an $\text{H}^{\pm}$, a neutral scalar, and a pseudoscalar, featuring additional Yukawa couplings to the top quark and u-type quarks, denoted by $\rho_{tt}$, $\rho_{tc}$, and $\rho_{tu}$. Motivated by previous LHC results, the extra Yukawa coupling $\rho_{tu}$ is set to zero in this analysis. The search focuses on the real components of the additional top quark Yukawa couplings, $\rho_{tt}$ and $\rho_{tc}$, which are probed up to values of unity.An excess is observed with respect to the standard model expectation with a local significance of 2.4 standard deviations for a signal with $m_{\text{H}^{\pm}} = 600$ GeV.Exclusion limits are derived on the product of the cross section $\sigma(\text{pp}\to\text{qH}^\pm)$ and branching fraction $\mathcal{B}(\text{H}^\pm\to\text{tb}, {\text{t}\to \text{b} \text{l}\nu})$, where $\text{l}=e, \mu$, for $\rho_{tc} \gtrsim 0.15-0.5$ depending on the $m_{\text{H}^{\pm}}$ and $\rho_{tt}$ assumption. The results represent the first search for charged Higgs bosons within the g2HDM framework and complement the existing results on additional neutral Higgs bosons.

Figure 4a

Data from Figure 4, located on page 11.

10.17182/hepdata.161621.v1/t1

The postfit pDNN distributions in the SR e 2b2j assuming $m_{H^\pm} = 600$ GeV. Postfit signal for $m_{H^\pm} = 600$...
Figure 4b

Data from Figure 4, located on page 11.

10.17182/hepdata.161621.v1/t2

The postfit pDNN distributions in the SR $\mu$ 2b2j assuming $m_{H^\pm} = 600$ GeV. Postfit signal for $m_{H^\pm} = 600$...
Figure 4c

Data from Figure 4, located on page 11.

10.17182/hepdata.161621.v1/t3

The postfit pDNN distributions in the SR e 3b3j assuming $m_{H^\pm} = 600$ GeV. Postfit signal for $m_{H^\pm} = 600$...
Figure 4d

Data from Figure 4, located on page 11.

10.17182/hepdata.161621.v1/t4

The postfit pDNN distributions in the SR $\mu$ 3b3j assuming $m_{H^\pm} = 600$ GeV. Postfit signal for $m_{H^\pm} = 600$...
Figure 5a

Data from Figure 5, located on page 12.

10.17182/hepdata.161621.v1/t5

The postfit pDNN distributions in the SR e 2b2j assuming $m_{H^\pm} = 1$ TeV. The signal for $m_{H^\pm} = 1$...
Figure 5b

Data from Figure 5, located on page 12.

10.17182/hepdata.161621.v1/t6

The postfit pDNN distributions in the SR $\mu$ 2b2j assuming $m_{H^\pm} = 1$ TeV. The signal for $m_{H^\pm} = 1$...
Figure 5c

Data from Figure 5, located on page 12.

10.17182/hepdata.161621.v1/t7

The postfit pDNN distributions in the SR e 3b3j assuming $m_{H^\pm} = 1$ TeV. The signal for $m_{H^\pm} = 1$...
Figure 5d

Data from Figure 5, located on page 12.

10.17182/hepdata.161621.v1/t8

The postfit pDNN distributions in the SR $\mu$ 3b3j assuming $m_{H^\pm} = 1$ TeV. The signal for $m_{H^\pm} = 1$...
Figure 6a

Data from Figure 6, located on page 13.

10.17182/hepdata.161621.v1/t9

Observed and expected 95% CL limits on the cross section times branching ratio for different $H^{\pm}$ mass hypotheses with $ρ_{tc}...
Figure 7 ρ$_{tt}$ = 1.00 observed

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t10

Observed excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 1.00 expected

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t11

Expected excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.60 observed

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t12

Observed excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.60 expected

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t13

Expected excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.40 observed

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t14

Observed excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.40 expected

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t15

Expected excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.30 observed

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t16

Observed excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.30 expected

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t17

Expected excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.20 observed

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t18

Observed excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 7 ρ$_{tt}$ = 0.20 expected

Data from Figure 7, located on page 13.

10.17182/hepdata.161621.v1/t19

Expected excluded phase-space regions, based on 95% CL limits, as a function of $m_{H^{\pm}}$ and $ρ_{tc}$ for various assumed $ρ_{tt}$...
Figure 8a observed

Data from Figure 8, located on page 14.

10.17182/hepdata.161621.v1/t20

Two times the difference of the negative log-likelihood (NLL) as a function of σ(pp →(q$^{light}$)H$^{\pm}$) B(H$^{\pm}$ → tb, t →...
Figure 8a expected

Data from Figure 8, located on page 14.

10.17182/hepdata.161621.v1/t21

Two times the difference of the negative log-likelihood (NLL) as a function of σ(pp →(q$^{light}$)H$^{\pm}$) B(H$^{\pm}$ → tb, t →...
Figure 8b observed

Data from Figure 8, located on page 14.

10.17182/hepdata.161621.v1/t22

Two times the difference of the negative log-likelihood (NLL) as a function of σ(pp →(q$^{light}$)H$^{\pm}$) B(H$^{\pm}$ → tb, t →...
Figure 8b expected

Data from Figure 8, located on page 14.

10.17182/hepdata.161621.v1/t23

Two times the difference of the negative log-likelihood (NLL) as a function of σ(pp →(q$^{light}$)H$^{\pm}$) B(H$^{\pm}$ → tb, t →...

Figure 4a

Figure 4b

Figure 4c

Figure 4d

Figure 5a

Figure 5b

Figure 5c

Figure 5d

Figure 6a

Figure 7 ρ$_{tt}$ = 1.00 observed

Figure 7 ρ$_{tt}$ = 1.00 expected

Figure 7 ρ$_{tt}$ = 0.60 observed

Figure 7 ρ$_{tt}$ = 0.60 expected

Figure 7 ρ$_{tt}$ = 0.40 observed

Figure 7 ρ$_{tt}$ = 0.40 expected

Figure 7 ρ$_{tt}$ = 0.30 observed

Figure 7 ρ$_{tt}$ = 0.30 expected

Figure 7 ρ$_{tt}$ = 0.20 observed

Figure 7 ρ$_{tt}$ = 0.20 expected

Figure 8a observed

Figure 8a expected

Figure 8b observed

Figure 8b expected

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