Search for physics beyond the standard model in top quark production with additional leptons in the context of effective field theory

The CMS collaboration
JHEP 12 (2023) 068, 2023.

Abstract
A search for new physics in top quark production with additional final-state leptons is performed using data collected by the CMS experiment in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the LHC during 2016-2018. The data set corresponds to an integrated luminosity of 138 fb$^{-1}$. Using the framework of effective field theory (EFT), potential new physics effects are parametrized in terms of 26 dimension-six EFT operators. The impacts of EFT operators are incorporated through the event-level reweighting of Monte Carlo simulations, which allows for detector-level predictions. The events are divided into several categories based on lepton multiplicity, total lepton charge, jet multiplicity, and b-tagged jet multiplicity. Kinematic variables corresponding to the transverse momentum ($p_\mathrm{T}$) of the leading pair of leptons and/or jets as well as the $p_\mathrm{T}$ of on-shell Z bosons are used to extract the 95% confidence intervals of the 26 Wilson coefficients corresponding to these EFT operators. No significant deviation with respect to the standard model prediction is found.

  • Figure 7

    Data from Figure 7, located on page 21.

    10.17182/hepdata.138415.v1/t1

    The 1$\sigma$ and 2$\sigma$ uncertainty intervals extracted from the likelihood fits described in Section 7. The intervals are shown for...

  • Figure 8a

    Data from Figure 8 (left), located on page 22.

    10.17182/hepdata.138415.v1/t2

    Observed $2 \Delta NLL$ of a 2D scan for $c_{tW}$ and $c_{tZ}$ with the other WCs profiled.

  • Figure 8b

    Data from Figure 8 (right), located on page 22.

    10.17182/hepdata.138415.v1/t3

    Observed $2 \Delta NLL$ of a 2D scan for $c_{tW}$ and $c_{tZ}$ with the other WCs fixed to their SM...

  • Figure 9a

    Data from Figure 9 (left), located on page 22.

    10.17182/hepdata.138415.v1/t4

    Observed $2 \Delta NLL$ of a 2D scan for $c^{-}_{\varphi Q}$ and $c_{\varphi t}$ with the other WCs profiled.

  • Figure 9b

    Data from Figure 9 (right), located on page 22.

    10.17182/hepdata.138415.v1/t5

    Observed $2 \Delta NLL$ of a 2D scan for $c_{tG}$ and $c_{t\varphi}$ with the other WCs profiled.

  • Figure 10a

    Data from Figure 10 (upper left), located on page 23.

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    Observed $2 \Delta NLL$ of a 2D scan for $c^{1}_{Qt}$ and $c^{8}_{Qt}$ with the other WCs profiled.

  • Figure 10b

    Data from Figure 10 (upper right), located on page 23.

    10.17182/hepdata.138415.v1/t7

    Observed $2 \Delta NLL$ of a 2D scan for $c^{1}_{QQ}$ and $c^{8}_{Qt}$ with the other WCs profiled.

  • Figure 10c

    Data from Figure 10 (lower left), located on page 23.

    10.17182/hepdata.138415.v1/t8

    Observed $2 \Delta NLL$ of a 2D scan for $c^{1}_{Qt}$ and $c^{1}_{tt}$ with the other WCs profiled.

  • Figure 10d

    Data from Figure 10 (lower right), located on page 23.

    10.17182/hepdata.138415.v1/t9

    Observed $2 \Delta NLL$ of a 2D scan for $c^{1}_{QQ}$ and $c^{1}_{Qt}$ with the other WCs profiled.

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