We study the feasibility of probing a region of Natural Supersymmetry where the stop and higgsino masses are compressed. Although this region is most effectively searched for in the mono-jet channel, this signature is present in many other non-supersymmetric frameworks. Therefore, another channel that carries orthogonal information is required to confirm the existence of the light stop and higgsinos. We show that a supersymmetric version of the ttˉH process, pp→tt~1χ~1(2)0, can have observably large rate when both the stop and higgsinos are significantly light, and it leads to a distinctive mono-top signature in the compressed mass region. We demonstrate that the hadronic channel of the mono-top signature can effectively discriminate the signal from backgrounds by tagging a hadronic top-jet. We show that the hadronic channel of mono-top signature offers a significant improvement over the leptonic channel and the sensitivity reaches mt~1≃420 GeV at the 13 TeV LHC with 3 ab−1 luminosity.
@article{arxiv.1610.06179,
title = {Tagging a mono-top signature in Natural SUSY},
author = {Dorival Goncalves and Kazuki Sakurai and Michihisa Takeuchi},
journal= {arXiv preprint arXiv:1610.06179},
year = {2017}
}