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Paper   IPM / Physic / 16296
School of Physics
Title:   Signs of new physics in top quark pair production associated with a neutrino pair at the LHC
Author(s):
 1 D. Haji Raissi 2 J. Ebadi 3 M. Mohammadi Najafabadi
Status:   Published
Journal: Phys. Rev. D
Vol.:  101
Year:  2020
Pages:   95002
Supported by:  IPM
Abstract:
In this paper, we examine the interactions of the top quarks with the Z boson using the top quark pair production associated with neutrino pair (ttνlνl) at the LHC. In particular, potential constraints on the anomalous electroweak top quark interactions are determined by considering two opposite-sign charged leptons, missing energy, and two b-tagged jets in the final state. The analysis is performed for a High Luminosity scenario of the LHC with an integrated luminosity of 3 ab−1 of proton-proton collisions at a center-of-mass energy of 14 TeV. The 95% confidence intervals are computed on the anomalous couplings considering a realistic detector simulation of an upgraded CMS detector including an average of 200 proton-proton interactions per bunch crossing. We find that the ttνlνl channel can provide stringent bounds on the relevant Wilson coefficients and has the potential to serve as an additional handle beside the ttZ(Zl+l) and other channels to search for new physics.

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