Loop induced single top partner production and decay at the LHC

Kim, Jeong Han; Lewis, Ian M.

doi:10.1007/jhep05(2018)095

Title: Loop induced single top partner production and decay at the LHC

Journal Article · Tue May 15 00:00:00 EDT 2018 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep05(2018)095· OSTI ID:1512400

Kim, Jeong Han ^[1]; Lewis, Ian M. ^[1]

Univ. of Kansas, Lawrence, KS (United States). Dept. of Physics and Astronomy

Most searches for top partners, T , are concerned with top partner pair production. However, as these bounds become increasingly stringent, the LHC energy will saturate and single top partner production will become more important. In this paper we study the novel signature of the top partner produced in association with the SM top, $p p \to T \bar{t} + t \bar{T}$ , in a model where the Standard Model (SM) is extended by a vector-like SU(2)_L singlet fermion top partner and a real, SM gauge singlet scalar, S. In this model, $p p \to T \bar{t} + t \bar{T}$ production is possible through loops mediated by the scalar singlet. We find that, with reasonable coupling strengths, the production rate of this channel can dominate top partner pair production at top partner masses of m_T ≳ 1.5 TeV. In addition, this model allows for the exotic decay modes T → tg, T → tγ, and T → tS. In much of the parameter space the loop induced decay T → tg dominates and the top partner is quite long lived. New search strategies are necessary to cover these decay modes. We project the the sensitivity of the high luminosity LHC to $p p \to T \bar{t} + t \bar{T}$ via a realistic collider study. We find with 3 ab^-1, the LHC is sensitive to this process for masses m_T ≲ 2 TeV. In addition, we provide appendices detailing the renormalization of this model.

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Research Organization:: Univ. of Kansas, Lawrence, KS (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0017988

OSTI ID:: 1512400

Journal Information:: Journal of High Energy Physics (Online), Vol. 2018, Issue 5; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 26 works

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A First Top Partner Hunter's Guide De Simone, Andrea; Matsedonskyi, Oleksii; Rattazzi, Riccardo arXiv https://doi.org/10.48550/arxiv.1211.5663	text	January 2012
Measuring Boosted Tops in Semi-leptonic $t\bar t$ Events for the Standard Model and Beyond Backovic, Mihailo; Gabizon, Ofir; Juknevich, Jose arXiv https://doi.org/10.48550/arxiv.1311.2962	text	January 2013
On the Interpretation of Top Partners Searches Matsedonskyi, Oleksii; Panico, Giuliano; Wulzer, Andrea arXiv https://doi.org/10.48550/arxiv.1409.0100	text	January 2014
Hunting composite vector resonances at the LHC: naturalness facing data Greco, Davide; Liu, Da arXiv https://doi.org/10.48550/arxiv.1410.2883	text	January 2014
Boosted Event Topologies from TeV Scale Light Quark Composite Partners Backović, Mihailo; Flacke, Thomas; Kim, Jeong Han arXiv https://doi.org/10.48550/arxiv.1410.8131	text	January 2014
Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1 Robens, Tania; Stefaniak, Tim arXiv https://doi.org/10.48550/arxiv.1501.02234	text	January 2015
The Fate of Long-Lived Superparticles with Hadronic Decays after LHC Run 1 Liu, Zhen; Tweedie, Brock arXiv https://doi.org/10.48550/arxiv.1503.05923	text	January 2015
Singlet-like Higgs bosons at present and future colliders Buttazzo, Dario; Sala, Filippo; Tesi, Andrea arXiv https://doi.org/10.48550/arxiv.1505.05488	text	January 2015
Beyond the Minimal Top Partner Decay Serra, Javi arXiv https://doi.org/10.48550/arxiv.1506.05110	text	January 2015
Single top partner production in the Higgs to diphoton channel in the Littlest Higgs Model with $T$-parity Liu, Ning; Wu, Lei; Yang, Bingfang arXiv https://doi.org/10.48550/arxiv.1508.07116	text	January 2015
Radiative corrections to the Higgs boson couplings in the model with an additional real singlet scalar field Kanemura, Shinya; Kikuchi, Mariko; Yagyu, Kei arXiv https://doi.org/10.48550/arxiv.1511.06211	text	January 2015
Singlet Extensions of the Standard Model at LHC Run 2: Benchmarks and Comparison with the NMSSM Costa, Raul; Mühlleitner, Margarete; Sampaio, Marco O. P. arXiv https://doi.org/10.48550/arxiv.1512.05355	text	January 2015
LHC Benchmark Scenarios for the Real Higgs Singlet Extension of the Standard Model Robens, Tania; Stefaniak, Tim arXiv https://doi.org/10.48550/arxiv.1601.07880	text	January 2016
One-loop corrections to the Higgs self-couplings in the singlet extension Kanemura, Shinya; Kikuchi, Mariko; Yagyu, Kei arXiv https://doi.org/10.48550/arxiv.1608.01582	text	January 2016
The Global Higgs as a Signal for Compositeness at the LHC Fichet, Sylvain; von Gersdorff, Gero; Ponton, Eduardo arXiv https://doi.org/10.48550/arxiv.1608.01995	text	January 2016
Deep-learning Top Taggers or The End of QCD? Kasieczka, Gregor; Plehn, Tilman; Russell, Michael arXiv https://doi.org/10.48550/arxiv.1701.08784	text	January 2017
Radiative corrections to masses and couplings in Universal Extra Dimensions Freitas, Ayres; Kong, Kyoungchul; Wiegand, Daniel arXiv https://doi.org/10.48550/arxiv.1711.07526	text	January 2017
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Electroweak phase transition in an extension of the standard model with a real Higgs singlet Ham, S. W.; Jeong, Y. S.; Oh, S. K. arXiv https://doi.org/10.48550/arxiv.hep-ph/0411352	text	January 2004
The Minimal Composite Higgs Model Agashe, Kaustubh; Contino, Roberto; Pomarol, Alex arXiv https://doi.org/10.48550/arxiv.hep-ph/0412089	text	January 2004
Stopping Gluinos Arvanitaki, A.; Dimopoulos, S.; Pierce, A. arXiv https://doi.org/10.48550/arxiv.hep-ph/0506242	text	January 2005
The Minimal Composite Higgs Model and Electroweak Precision Tests Agashe, Kaustubh; Contino, Roberto arXiv https://doi.org/10.48550/arxiv.hep-ph/0510164	text	January 2005
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Variations of Little Higgs Models and their Electroweak Constraints Csaki, C.; Hubisz, J.; Kribs, G. D. arXiv https://doi.org/10.48550/arxiv.hep-ph/0303236	text	January 2003
Top Quarks and Electroweak Symmetry Breaking in Little Higgs Models Perelstein, Maxim; Peskin, Michael E.; Pierce, Aaron arXiv https://doi.org/10.48550/arxiv.hep-ph/0310039	text	January 2003
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