Tagging a monotop signature in natural SUSY

Gonçalves, Dorival; Sakurai, Kazuki; Takeuchi, Michihisa

Abstract

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 monojet channel, this signature is present in many other nonsupersymmetric 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 t¯tH process, pp → t~t1χ~ 0 1ð2Þ , can have an observably large rate when both the stop and Higgsinos are significantly light, and it leads to a distinctive monotop signature in the compressed mass region. We demonstrate that the hadronic channel of the monotop signature can effectively discriminate the signal from backgrounds by tagging a hadronic top jet. We show that the hadronic channel of the monotop signature offers a significant improvement over the leptonic channel and the sensitivity reaches m~t1 ≃ 420 GeV at the 13 TeV LHC with 3 ab−1 luminosity.

Citation

Gonçalves, D., Sakurai, K., & Takeuchi, M. (2017). Tagging a monotop signature in natural SUSY. Physical Review D, 95(1), Article 015030. https://doi.org/10.1103/physrevd.95.015030

• Journal Article Type: Article
• Acceptance Date: Nov 2, 2016
• Online Publication Date: Jan 30, 2017
• Publication Date: Jan 30, 2017
• Deposit Date: Jul 26, 2017
• Publicly Available Date: Jul 26, 2017
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 95
• Issue: 1
• Article Number: 015030
• DOI: https://doi.org/10.1103/physrevd.95.015030
• Public URL: https://durham-repository.worktribe.com/output/1353722