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Hitting two BSM particles with one lepton-jet: search for a top partner decaying to a dark photon, resulting in a lepton-jet

by K. du Plessis, M. M. Flores, D. Kar, S. Sinha, H. van der Schyf

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Submission summary

Authors (as registered SciPost users): Deepak Kar · Sukanya Sinha
Submission information
Preprint Link:  (pdf)
Date accepted: 2022-07-12
Date submitted: 2022-06-22 07:30
Submitted by: Kar, Deepak
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approach: Phenomenological


A maverick top partner model, decaying to a dark photon was suggested. The dark photon decays to two overlapping electrons for dark photon masses of $\approx 100$ GeV, and results in a so-called lepton-jet. The event includes a top quark as well, which results in events with two boosted objects, one heavy and the other light. We propose a search strategy exploiting the unique signal topology. We show that for a set of kinematic selections, both in hadronic and leptonic decay channel of the SM top quark, almost all background can be eliminated, leaving enough signal events up to top partner mass of about 3 TeV for the search to be viable at the LHC.

List of changes

We have included referee's suggestion for the introduction text, fixed the caption in Fig 6, and just used pair pT to avoid confusion in the new version.

Published as SciPost Phys. 13, 018 (2022)

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