Abstract

A search is presented for new Higgs bosons in proton-proton (pp) collision events in which a same-sign top quark pair is produced in association with a jet, via the pp $\to$ tH/A $\to$ t$\mathrm{\bar{t}}$c and pp $\to$ tH/A $\to$ t$\mathrm{\bar{t}}$u processes. Here, H and A represent the extra scalar and pseudoscalar boson, respectively, of the second Higgs doublet in the generalized two-Higgs-doublet model (g2HDM). The search is based on pp collision 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 fb$^{-1}$. Final states with a same-sign lepton pair in association with jets and missing transverse momentum are considered. New Higgs bosons in the 200-1000 GeV mass range and new Yukawa couplings between 0.1 and 1.0 are targeted in the search, for scenarios in which either H or A appear alone, or in which they coexist and interfere. No significant excess above the standard model prediction is observed. Exclusion limits are derived in the context of the g2HDM.

Figure 2a

Example location

10.17182/hepdata.140528.v1/t1

Pre-fit distributon for leading jet's CvsL variable.
Figure 2b

Example location

10.17182/hepdata.140528.v1/t2

Pre-fit distributon for leading jet's CvsB variable.
Figure 3a

Example location

10.17182/hepdata.140528.v1/t3

Post-fit distributon of BDT discriminants for $\rho_{tu}=1.0$ with $m_A$ = 350 GeV interfered with H.($m_A - m_H$ = 50 GeV)
Figure 3b

Example location

10.17182/hepdata.140528.v1/t4

Post-fit distributon of BDT discriminants for $\rho_{tc}=1.0$ with $m_A$ = 350 GeV interfered with H.($m_A - m_H$ = 50 GeV)
Figure 4a

Example location

10.17182/hepdata.140528.v1/t5

Observed and expected 95% CL upper limit on the signal strength as a function of $m_A$ for the g2HDM signal...
Figure 4b

Example location

10.17182/hepdata.140528.v1/t6

Observed and expected 95% CL upper limit on the signal strength as a function of $m_A$ for the g2HDM signal...
Figure 5a

Example location

10.17182/hepdata.140528.v1/t7

Observed and expected 95% CL upper limit on the signal strength as a function of $m_A$ for the g2HDM signal...
Figure 5b

Example location

10.17182/hepdata.140528.v1/t8

Observed and expected 95% CL upper limit on the signal strength as a function of $m_A$ for the g2HDM signal...
Figure 6a

Example location

10.17182/hepdata.140528.v1/t9

Observed 95% CL upper limit on the signal strength as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal...
Figure 6a(expected exclusion)

Example location

10.17182/hepdata.140528.v1/t10

Expected exclusion as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal model
Figure 6a(observed exclusion)

Example location

10.17182/hepdata.140528.v1/t11

Observed exclusion as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal model
Figure 6b

Example location

10.17182/hepdata.140528.v1/t12

Observed 95% CL upper limit on the signal strength as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal...
Figure 6b(expected exclusion)

Example location

10.17182/hepdata.140528.v1/t13

Expected exclusion as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal model
Figure 6b(observed exclusion)

Example location

10.17182/hepdata.140528.v1/t14

Observed exclusion as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal model
Figure 7a

Example location

10.17182/hepdata.140528.v1/t15

Observed 95% CL upper limit on the signal strength as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal...
Figure 7a(expected exclusion)

Example location

10.17182/hepdata.140528.v1/t16

Expected exclusion as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal model with A–H interference assuming $m_A$ −...
Figure 7a(observed exclusion)

Example location

10.17182/hepdata.140528.v1/t17

Observed exclusion as a function of $m_A$ and $\rho_{tu}$ for the g2HDM signal model with A–H interference assuming $m_A$ −...
Figure 7b

Example location

10.17182/hepdata.140528.v1/t18

Observed 95% CL upper limit on the signal strength as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal...
Figure 7b(expected exclusion)

Example location

10.17182/hepdata.140528.v1/t19

Expected exclusion as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal model with A–H interference assuming $m_A$ −...
Figure 7b(observed exclusion)

Example location

10.17182/hepdata.140528.v1/t20

Observed exclusion as a function of $m_A$ and $\rho_{tc}$ for the g2HDM signal model with A–H interference assuming $m_A$ −...

Figure 2a

Figure 2b

Figure 3a

Figure 3b

Figure 4a

Figure 4b

Figure 5a

Figure 5b

Figure 6a

Figure 6a(expected exclusion)

Figure 6a(observed exclusion)

Figure 6b

Figure 6b(expected exclusion)

Figure 6b(observed exclusion)

Figure 7a

Figure 7a(expected exclusion)

Figure 7a(observed exclusion)

Figure 7b

Figure 7b(expected exclusion)

Figure 7b(observed exclusion)

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