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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) (SC-25)
OSTI Identifier:
1505218
Grant/Contract Number:  
SC0007890
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
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)},
issn = {1029-8479},
number = 2,
volume = 2018,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
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