Tracking Down the Top Quark Forward-Backward Asymmetry with Monotops

Abstract

We revisit the possibility that the top quark forward-backward asymmetry arises from the on-shell production and decay of scalar top partners to top-antitop pairs with missing transverse energy. Although the asymmetry is produced by t-channel exchange of a light mediator, the model remains unconstrained by low energy atomic parity violation tests. An interesting connection to the active neutrino sector through a Type-I seesaw operator helps to evade stringent monojet constraints and opens up a richer collider phenomenology. After performing a global fit to top data from both the Tevatron and the LHC, we obtain a viable region of parameter space consistent with all phenomenological and collider constraints. We also discuss the discovery potential of a predicted monotop signal and related lepton charge asymmetry at the LHC.

11 pages, 12 figures. Minor changes to text, matches version published in PRD

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Cited by in corpus (10)

• Search for monotop signatures in proton-proton collisions at sqrt(s) = 8 TeV
• Search for invisible particles produced in association with single-top-quarks in proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Monotop phenomenology at the Large Hadron Collider
• Revisiting monotop production at the LHC
• Leptonic Monotops at LHC
• A Minimal Model of Majoronic Dark Radiation and Dark Matter
• Probing Radiative Neutrino Mass Generation through Monotop Production
• Signatures of top flavour-changing dark matter
• The Charged Higgs from the Bottom-Up: Probing Flavor at the LHC
• Probing bottom-associated production of a TeV scale scalar decaying to a top quark and dark matter at the LHC