skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Impact of rare decays t → ℓ'νbℓℓ and t → qq'bℓℓ on searches for top-associated physics

Abstract

Searches for top quark-associated physics such as $$ t\overline{t}\ $$W or $$ t\overline{t}\ $$H in final states with multiple leptons require a careful accounting of expected backgrounds due to the lack of reconstructible resonances. We demonstrate that the rare top quark decays t → ℓ'νbℓℓ and t → qq'bℓℓ, when a soft lepton is not detected, can contribute a non-negligible background to such searches. Simulations in the LHC experiments typically do not account for such decays and as such backgrounds to such searches may be underestimated.

Authors:
ORCiD logo [1];  [1]
  1. Univ. of Texas, Austin, TX (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1505218
Grant/Contract Number:  
SC0007890
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 2; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-Hadron scattering (experiments); Higgs physics; Rare decay; Top physics

Citation Formats

Onyisi, P., and Webb, A. Impact of rare decays t → ℓ'νbℓℓ and t → qq'bℓℓ on searches for top-associated physics. United States: N. p., 2018. Web. doi:10.1007/jhep02(2018)156.
Onyisi, P., & Webb, A. Impact of rare decays t → ℓ'νbℓℓ and t → qq'bℓℓ on searches for top-associated physics. United States. doi:10.1007/jhep02(2018)156.
Onyisi, P., and Webb, A. Mon . "Impact of rare decays t → ℓ'νbℓℓ and t → qq'bℓℓ on searches for top-associated physics". United States. doi:10.1007/jhep02(2018)156. https://www.osti.gov/servlets/purl/1505218.
@article{osti_1505218,
title = {Impact of rare decays t → ℓ'νbℓℓ and t → qq'bℓℓ on searches for top-associated physics},
author = {Onyisi, P. and Webb, A.},
abstractNote = {Searches for top quark-associated physics such as $ t\overline{t}\ $W or $ t\overline{t}\ $H in final states with multiple leptons require a careful accounting of expected backgrounds due to the lack of reconstructible resonances. We demonstrate that the rare top quark decays t → ℓ'νbℓℓ and t → qq'bℓℓ, when a soft lepton is not detected, can contribute a non-negligible background to such searches. Simulations in the LHC experiments typically do not account for such decays and as such backgrounds to such searches may be underestimated.},
doi = {10.1007/jhep02(2018)156},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2018,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

The t→WZb decay in the Standard Model: a critical reanalysis
journal, March 2001


PHOTOS interface in C++
journal, February 2016


Top++: A program for the calculation of the top-pair cross-section at hadron colliders
journal, November 2014


XSEDE: Accelerating Scientific Discovery
journal, September 2014

  • Towns, John; Cockerill, Timothy; Dahan, Maytal
  • Computing in Science & Engineering, Vol. 16, Issue 5
  • DOI: 10.1109/MCSE.2014.80

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

  • Alwall, J.; Frederix, R.; Frixione, S.
  • Journal of High Energy Physics, Vol. 2014, Issue 7
  • DOI: 10.1007/JHEP07(2014)079

A brief introduction to PYTHIA 8.1
journal, June 2008

  • Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
  • Computer Physics Communications, Vol. 178, Issue 11
  • DOI: 10.1016/j.cpc.2008.01.036

    Works referencing / citing this record:

    Search for squarks and gluinos in final states with same-sign leptons and jets using 139 fb−1 of data collected with the ATLAS detector
    journal, June 2020

    • Aad, G.; Abbott, B.; Abbott, D. C.
    • Journal of High Energy Physics, Vol. 2020, Issue 6
    • DOI: 10.1007/jhep06(2020)046