Dark Decay of the Top Quark

Kong, Kyoungchul; Lee, Hye-Sung; Park, Myeonghun

doi:10.1103/PhysRevD.89.074007

Title: Dark Decay of the Top Quark

Journal Article · Tue Apr 01 00:00:00 EDT 2014 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.89.074007· OSTI ID:1128675

Kong, Kyoungchul; Lee, Hye-Sung; Park, Myeonghun

We suggest top quark decays as a venue to search for light dark force carriers. The top quark is the heaviest particle in the standard model whose decays are relatively poorly measured, allowing sufficient room for exotic decay modes from new physics. A very light (GeV scale) dark gauge boson (Z') is a recently highlighted hypothetical particle that can address some astrophysical anomalies as well as the 3.6sigma deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t-->bW+Z's. This is the same as the dominant top quark decay (t-->bW) accompanied by one or multiple dark force carriers. The Z' can be easily boosted, and it can decay into highly collimated leptons (lepton-jet) with large branching ratio. We discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02- 12ER41809; AC05-06OR23177

OSTI ID:: 1128675

Report Number(s):: JLAB-THY-14-1861; DOE/OR/23177-3044; NSF Grant No. PHY-1068008; TRN: US1400283

Journal Information:: Physical Review. D, Particles Fields, Vol. 89, Issue 07; ISSN 0556-2821

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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Cited By (6)

Muon $g - 2$ , rare kaon decays, and parity violation from dark bosons Davoudiasl, Hooman; Lee, Hye-Sung; Marciano, William J. Physical Review D, Vol. 89, Issue 9 https://doi.org/10.1103/physrevd.89.095006	journal	May 2014
Dark photon relic dark matter production through the dark axion portal Kaneta, Kunio; Lee, Hye-Sung; Yun, Seokhoon Physical Review D, Vol. 95, Issue 11 https://doi.org/10.1103/physrevd.95.115032	journal	June 2017
Examining the origin of dark matter mass at colliders Kim, Minho; Lee, Hye-Sung; Park, Myeonghun Physical Review D, Vol. 98, Issue 5 https://doi.org/10.1103/physrevd.98.055027	journal	September 2018
Is it possible to discover a dark matter particle with an accelerator? Bednyakov, V. A. Physics of Particles and Nuclei, Vol. 47, Issue 5 https://doi.org/10.1134/s1063779616050026	journal	September 2016
Examining the origin of dark matter mass at colliders Kim, Minho; Lee, Hye-Sung; Park, Myeonghun arXiv https://doi.org/10.48550/arxiv.1612.02850	text	January 2016
Dark photon relic dark matter production through the dark axion portal Kaneta, Kunio; Lee, Hye-Sung; Yun, Seokhoon arXiv https://doi.org/10.48550/arxiv.1704.07542	text	January 2017

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