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Title: Identifying boosted new physics with non-isolated leptons

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [2];  [3];  [4];  [2]
  1. Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy; Univ. of Maryland, College Park, MD (United States). Dept. of Physics; Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
  2. Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy
  3. Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy; Univ. of Maryland, College Park, MD (United States). Dept. of Physics
  4. Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy; Boston Univ., MA (United States). Dept. of Physics
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Here, we demonstrate the utility of leptons which fail standard isolation criteria in searches for new physics at the LHC. Such leptons can arise in any event containing a highly boosted particle which decays to both leptons and quarks. We begin by considering multiple extensions to the Standard Model which primarily lead to events with non-isolated leptons and are therefore missed by current search strategies. We emphasize the failure of standard isolation variables to adequately discriminate between signal and SM background for any value of the isolation cuts. We then introduce a new approach which makes use of jet substructure techniques to distinguish a broad range of signals from QCD events. We proceed with a simulated, proof-of-principle search for R-parity violating supersymmetry to demonstrate both the experimental reach possible with the use of non-isolated leptons and the utility of new substructure variables over existing techniques.

Research Organization:
Boston Univ., MA (United States); Johns Hopkins Univ., Baltimore, MD (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); Henry Luce Foundation, Inc., New York, NY (United States); John Templeton Foundation, Conshohocken, PA (United States)
Contributing Organization:
Stanford Univ., CA (United States)
Grant/Contract Number:
SC0010025; PHY-1315155; PHY-1404302; 7815; PHY-1214000
OSTI ID:
1454583
Journal Information:
Journal of High Energy Physics (Online), Vol. 2015, Issue 4; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (21)

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Jet Substructure as a New Higgs-Search Channel at the Large Hadron Collider journal June 2008
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Cited By (5)

Detecting a Boosted Diboson Resonance text January 2018
Pileup and Underlying Event Mitigation with Iterative Constituent Subtraction text January 2019
Cornering Natural SUSY at LHC Run II and Beyond text January 2016
Jets with electrons from boosted top quarks journal January 2020
Detecting a boosted diboson resonance journal November 2018

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Jet substructure
Beyond Standard Model
Hadron-Hadron Scattering