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Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC

Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC
Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC

Many scenarios of physics beyond the Standard Model that address the hierarchy problem also predict the existence of vectorlike top quark partners, which are generally expected around the TeV scale. In this paper, we propose to search for a vectorlike top quark partner with charge 2/3 in a simplified model including only two free parameters, the coupling constant g∗ and top quark partner mass mT. We investigate the observability of the top quark partner through the process pp→T(→th)j→t(→bW+→b+ν)h(→WW∗→+ν-ν)j, where T is the heavy top quark partner and h the SM-like Higgs boson, at the Large Hadron Collider (LHC). The discovery prospects and exclusion limits on the parameter plane defined by (mT, g∗) are obtained for the already scheduled LHC runs as well as the future High-Luminosity LHC (HL-LHC). The constraints and projected sensitivities are also interpreted in a realistic model, i.e., the minimal Composite Higgs Model with singlet top quark partners. Finally, we also analyze the projected sensitivity in terms of the production cross section times branching fraction at the (HL-)LHC.

2470-0010
1-9
Liu, Yao Bei
1e5720f9-1103-4ed9-bb45-7215c7ca4a36
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Liu, Yao Bei
1e5720f9-1103-4ed9-bb45-7215c7ca4a36
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614

Liu, Yao Bei and Moretti, Stefano (2019) Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC. Physical Review D, 100 (1), 1-9, [015025]. (doi:10.1103/PhysRevD.100.015025).

Record type: Article

Abstract

Many scenarios of physics beyond the Standard Model that address the hierarchy problem also predict the existence of vectorlike top quark partners, which are generally expected around the TeV scale. In this paper, we propose to search for a vectorlike top quark partner with charge 2/3 in a simplified model including only two free parameters, the coupling constant g∗ and top quark partner mass mT. We investigate the observability of the top quark partner through the process pp→T(→th)j→t(→bW+→b+ν)h(→WW∗→+ν-ν)j, where T is the heavy top quark partner and h the SM-like Higgs boson, at the Large Hadron Collider (LHC). The discovery prospects and exclusion limits on the parameter plane defined by (mT, g∗) are obtained for the already scheduled LHC runs as well as the future High-Luminosity LHC (HL-LHC). The constraints and projected sensitivities are also interpreted in a realistic model, i.e., the minimal Composite Higgs Model with singlet top quark partners. Finally, we also analyze the projected sensitivity in terms of the production cross section times branching fraction at the (HL-)LHC.

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PhysRevD.100.015025 - Version of Record
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Accepted/In Press date: 17 July 2019
e-pub ahead of print date: 17 July 2019
Published date: July 2019

Identifiers

Local EPrints ID: 433669
URI: http://eprints.soton.ac.uk/id/eprint/433669
ISSN: 2470-0010
PURE UUID: 05bf2301-aff9-4d8e-8fac-1464b913befa

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Date deposited: 30 Aug 2019 16:30
Last modified: 25 Nov 2021 17:03

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Contributors

Author: Yao Bei Liu
Author: Stefano Moretti

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