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Title: Monotop signature from a fermionic top partner

Abstract

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.

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Pittsburgh, PA (United States). PITT PACC. Dept. of Physics and Astronomy
  2. Univ. of Kansas, Lawrence, KS (United States). Dept. of Physics and Astronomy
  3. Univ. of Warsaw (Poland). Inst. of Theoretical Physics. Faculty of Physics
  4. Univ. of Tokyo, Kashiwa (Japan). Kavli IPMU (WPI). UTIAS
Publication Date:
Research Org.:
Univ. of Kansas, Lawrence, KS (United States); Univ. of Pittsburgh, PA (United States); Univ. of Warsaw (Poland); Univ. of Tokyo, Kashiwa (Japan)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); 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)
OSTI Identifier:
1416060
Alternate Identifier(s):
OSTI ID: 1503838
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
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 43 PARTICLE ACCELERATORS; extensions of fermion sector; hierarchy problem; higher-dimensional field theories; particle interactions; particle production; weakly interacting massive particles; Hadron colliders; particle accelerators

Citation Formats

Gonçalves, Dorival, Kong, Kyoungchul, Sakurai, Kazuki, and Takeuchi, Michihisa. Monotop signature from a fermionic top partner. United States: N. p., 2018. Web. doi:10.1103/physrevd.97.015002.
Gonçalves, Dorival, Kong, Kyoungchul, Sakurai, Kazuki, & Takeuchi, Michihisa. Monotop signature from a fermionic top partner. United States. doi:10.1103/physrevd.97.015002.
Gonçalves, Dorival, Kong, Kyoungchul, Sakurai, Kazuki, and Takeuchi, Michihisa. Mon . "Monotop signature from a fermionic top partner". United States. doi:10.1103/physrevd.97.015002.
@article{osti_1416060,
title = {Monotop signature from a fermionic top partner},
author = {Gonçalves, Dorival and Kong, Kyoungchul and Sakurai, Kazuki and Takeuchi, Michihisa},
abstractNote = {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.},
doi = {10.1103/physrevd.97.015002},
journal = {Physical Review D},
issn = {2470-0010},
number = 1,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/physrevd.97.015002

Citation Metrics:
Cited by: 1 work
Citation information provided by
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Figures / Tables:

FIG. 1 FIG. 1: Representative set of Feynman diagrams resulting in the monotop signature in the third generation extradimensional model.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.