Monotop signature from a fermionic top partner

Gonçalves, Dorival; Kong, Kyoungchul; Sakurai, Kazuki; Takeuchi, Michihisa

doi:10.1103/PhysRevD.97.015002

Title: Monotop signature from a fermionic top partner

Journal Article · Mon Jan 08 00:00:00 EST 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.97.015002· OSTI ID:1416060

Gonçalves, Dorival; Kong, Kyoungchul; Sakurai, Kazuki; Takeuchi, Michihisa

We investigate monotop signatures arising from phenomenological models of fermionic top partners, which are degenerate in mass and decay into a bosonic dark matter candidate, either spin 0 or spin 1. Such a model provides a monotop signature as a smoking gun, while conventional searches with $$t\overline{t}+$$ missing transverse momentum are limited. Two such scenarios, (i) a phenomenological third generation extradimensional model with excited top and electroweak sectors, and (ii) a model where only a top partner and a dark matter particle are added to the standard model, are studied in the degenerate mass regime. We find that in the case of extra dimension a number of different processes give rise to effectively the same monotop final state, and a great gain can be obtained in the sensitivity for this channel. We show that the monotop search can explore top-partner masses up to 630 and 300 GeV for the third generation extradimensional model and the minimal fermionic top-partner model, respectively, at the high luminosity LHC.

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Research Organization:: Univ. of Kansas, Lawrence, KS (United States); Univ. of Pittsburgh, PA (United States); Univ. of Warsaw (Poland); Univ. of Tokyo, Kashiwa (Japan)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); Univ. of Kansas (United States); National Science Foundation (NSF); German Research Foundation (DFG); National Science Centre (Poland); Japan Society for the Promotion of Science (JSPS)

Grant/Contract Number:: SC0017965; 2151081; PHY-1519175; SFB1258; DEC-2014/15/B/ST2/02157; DEC-2015/18/M/ST2/00054; 2015/19/D/ST2/03136; JP16H03991; JP16H02176; 17H05399

OSTI ID:: 1416060

Alternate ID(s):: OSTI ID: 1503838

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 1; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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Title: Monotop signature from a fermionic top partner

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