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

Abstract

We suggest top quark decays as a venue to search for light dark force carriers. 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 3.6 σ deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t → b W + Z's. This is the same as the dominant top quark decay (t → b W) 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. In addition, we discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.

Authors:

Kong, Kyoungchul ^[1]; Lee, Hye -Sung ^[2]; Park, Myeonghun ^[3]

Univ. of Kansas, Lawrence, KS (United States)
College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
The Univ. of Tokyo, Kashiwa (Japan)

Publication Date:: Tue Apr 01 00:00:00 EDT 2014

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

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1128911

Report Number(s):: JLAB-THY-14-1840; DOE/OR/23177-3039; arXiv:1401.5020
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1600828

Grant/Contract Number:: AC05-06OR23177

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 89; Journal Issue: 7; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Kong, Kyoungchul, Lee, Hye -Sung, and Park, Myeonghun. Dark decay of the top quark.  United States: N. p., 2014. 
Web.  doi:10.1103/PhysRevD.89.074007.

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                    Kong, Kyoungchul, Lee, Hye -Sung, & Park, Myeonghun. Dark decay of the top quark.  United States.  https://doi.org/10.1103/PhysRevD.89.074007

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                    Kong, Kyoungchul, Lee, Hye -Sung, and Park, Myeonghun. Tue .  
"Dark decay of the top quark".  United States.  https://doi.org/10.1103/PhysRevD.89.074007.  https://www.osti.gov/servlets/purl/1128911.

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@article{osti_1128911,

  title        = {Dark decay of the top quark},

  author       = {Kong, Kyoungchul and Lee, Hye -Sung and Park, Myeonghun},

  abstractNote = {We suggest top quark decays as a venue to search for light dark force carriers. 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 3.6 σ deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t → b W + Z's. This is the same as the dominant top quark decay (t → b W) 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. In addition, we discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.},

  doi          = {10.1103/PhysRevD.89.074007},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 7,

  volume       = 89,

  place        = {United States},

  year         = {Tue Apr 01 00:00:00 EDT 2014},

  month        = {Tue Apr 01 00:00:00 EDT 2014}

}

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Title: Dark decay of the top quark

Abstract

Citation Formats

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Two U(1)'s and ϵ charge shifts journal, January 1986

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Review of Particle Physics
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An anomalous positron abundance in cosmic rays with energies 1.5–100 GeV
journal, April 2009

First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
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journal, June 2007

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journal, February 2014

Identification of b-quark jets with the CMS experiment
journal, April 2013

Using energy peaks to count dark matter particles in decays
journal, June 2013

Observation of a new Boson at a mass of 125 gev with the cms Experiment at the lhc
conference, March 2015

Review of Particle Physics
text, January 2008

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
text, January 2018

Review of Particle Physics
text, January 2018

Measurement of the t(t)over-bar production cross section in the dilepton channel in pp collisions at root s=8 TeV
text, January 2014

Review of Particle Physics
text, January 2012

Identification of b-quark jets with the CMS experiment
text, January 2013

A Theory of Dark Matter
text, January 2008

Secluded U(1) below the weak scale
text, January 2008

MadGraph 5 : Going Beyond
text, January 2011

"Dark" Z implications for Parity Violation, Rare Meson Decays, and Higgs Physics
text, January 2012

Using Energy Peaks to Count Dark Matter Particles in Decays
text, January 2012

Dark Two Higgs Doublet Model
text, January 2013

Higgs Decays as a Window into the Dark Sector
text, January 2013

DELPHES 3, A modular framework for fast simulation of a generic collider experiment
text, January 2013

Higgs phenomenology in Type-I 2HDM with U(1)_H Higgs gauge symmetry
text, January 2013

Is it possible to discover a dark matter particle with an accelerator?
journal, September 2016

Examining the origin of dark matter mass at colliders
text, January 2016

Dark photon relic dark matter production through the dark axion portal
text, January 2017