The anomalous Wtb vertex and top-pair production at the LHC

Tiwari, Apurba; Gupta, Sudhir Kumar

doi:10.1016/j.nuclphysb.2022.115898

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…In addition, studies related to Higgs coupling to gluons [91], tau leptons [92][93][94][95], and muons [96,97] have also been explored independently. Besides, P-violation in the processes of top-production and decay has also been searched immensely in the existing literature [98][99][100][101][102][103][104][105]. Upper limits on neutron, mercury and electric dipole moments (EDMs) have placed indirect constraints on the anomalous Higgs-top interactions.…”

Section: Introductionmentioning

confidence: 99%

tt¯H Interactions and T-odd Correlations at Hadron Colliders

Tiwari,

Gupta

2024

J. Phys. G: Nucl. Part. Phys.

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We explore $\mathcal CP$-violation effects of Higgs-top interactions in the associated production of a Higgs boson with top-pair in the dileptonic decay modes of top-quark originating from proton proton collisions $pp \to t\bar{t}H \to (l^+ \nu_l b)(l^{-} \bar{\nu_l} \bar{b})H$ at NLO in QCD matched to parton shower via T-odd observables using momenta of various particles involved in the process. In particular, we predict the constraints on the $\mathcal CP$-violating $t\bar{t}H$ coupling obtained through the production asymmetries associated with the T-odd observables in the dileptonic decay channel of the $t\bar{t}$ pair for the LHC with centre-of-mass energy of 13 TeV and an integrated luminosity of 139 fb$^{-1}$. We also present the corresponding limits for future hadron colliders, namely the High Luminosity LHC (HL-LHC) and the Future Circular Collider (FCC-HH). Our estimates of the $t\bar{t}H$ interaction strength reveal that the upper bound on pseudoscalar coupling $c_p$ corresponding to the largest asymmetry would be of about $1.57 \times 10^{-2}$ at 2$\sigma$ C.L. for $c_s$ = 1 at the LHC with $\sqrt{S}$ = 13 TeV for an integrated luminosity of 139 fb$^{-1}$. The respective limits for HL-LHC and FCC-hh with the projected Luminosities of 3 ab$^{-1}$ and 30 ab$^{-1}$ are found to be to $2.7 \times 10^{-3}$ and $1.3\times 10^{-4}$ respectively at 2$\sigma$ C.L.

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Section: Introductionmentioning

confidence: 99%

tt¯H Interactions and T-odd Correlations at Hadron Colliders

Tiwari,

Gupta

2024

J. Phys. G: Nucl. Part. Phys.

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“…In particular, we find the C𝑃-violation sensitivity to anomalous top-quark couplings using T-odd triple product correlations [6,7] constructed through the momenta of the end state particles for the already present data at LHC with √ 𝑆 = 13 TeV and its luminosity intense variant HL-LHC with √ 𝑆 = 14 TeV. C𝑃-violating anomalous top-quark interactions have been studied extensively in the existing literature [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

$\mathcal CP$-violating anomalous interactions at Large Hadron Collider

Tiwari¹,

Gupta²

2022

Preprint

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In this study, we explore the effects of C𝑃-violating anomalous interactions of the top-quark through the semileptonic decay modes of the top-quark arising due to pair-production of 𝑡 t at the Large Hardon Collider. Predictions on the LHC sensitivities of the coupling strength to such C𝑃-violating interactions would be discussed for the 13 TeV LHC data and for the future hadron collider with 14 TeV energy.

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“…We consider an effective field theory approach to parameterise the anomalous Wtb vertex. In this framework, the most general Wtb vertex is expressed as [5]:…”

Section: Introductionmentioning

confidence: 99%

New physics contributions to $Wtb$ anomalous couplings and top-quark decay.

Tiwari¹,

Gupta²

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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In this work, we study the new physics effects arising due the presence of anomalous Wtb vertex through the semileptonic decay modes of the top-quark at the Large Hadron Collider. An estimate on the sensitivities of the aforementioned interaction at 5σ CL in the context of top-quark decay-width measurements and crosssection measurements would also be discussed for the pre-existing 13 TeV LHC data and its projections for the proposed LHC runs at 14 TeV, 27 TeV and 100 TeV. We also incorporate the CP-violating effects to such interactions by constructing the CP-violating asymmetries.

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The anomalous Wtb vertex and top-pair production at the LHC

Cited by 3 publications

References 29 publications

tt¯H Interactions and T-odd Correlations at Hadron Colliders

tt¯H Interactions and T-odd Correlations at Hadron Colliders

$\mathcal CP$-violating anomalous interactions at Large Hadron Collider

New physics contributions to $Wtb$ anomalous couplings and top-quark decay.

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