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Title: Identifying boosted new physics with non-isolated leptons

Abstract

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.

Authors:
 [1];  [2];  [2];  [3];  [4];  [2]
+ Show Author Affiliations
  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
Publication Date:
Research Org.:
Boston Univ., MA (United States); Johns Hopkins Univ., Baltimore, MD (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); Henry Luce Foundation, Inc., New York, NY (United States); John Templeton Foundation, Conshohocken, PA (United States)
Contributing Org.:
Stanford Univ., CA (United States)
OSTI Identifier:
1454583
Grant/Contract Number:  
SC0010025; PHY-1315155; PHY-1404302; 7815; PHY-1214000
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: 2015; Journal Issue: 4; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jet substructure; Beyond Standard Model; Hadron-Hadron Scattering

Citation Formats

Brust, Christopher, Maksimovic, Petar, Sady, Alice, Saraswat, Prashant, Walters, Matthew T., and Xin, Yongjie. Identifying boosted new physics with non-isolated leptons. United States: N. p., 2015. Web. doi:10.1007/JHEP04(2015)079.
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Brust, Christopher, Maksimovic, Petar, Sady, Alice, Saraswat, Prashant, Walters, Matthew T., & Xin, Yongjie. Identifying boosted new physics with non-isolated leptons. United States. https://doi.org/10.1007/JHEP04(2015)079
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Brust, Christopher, Maksimovic, Petar, Sady, Alice, Saraswat, Prashant, Walters, Matthew T., and Xin, Yongjie. Wed . "Identifying boosted new physics with non-isolated leptons". United States. https://doi.org/10.1007/JHEP04(2015)079. https://www.osti.gov/servlets/purl/1454583.
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@article{osti_1454583,
title = {Identifying boosted new physics with non-isolated leptons},
author = {Brust, Christopher and Maksimovic, Petar and Sady, Alice and Saraswat, Prashant and Walters, Matthew T. and Xin, Yongjie},
abstractNote = {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.},
doi = {10.1007/JHEP04(2015)079},
journal = {Journal of High Energy Physics (Online)},
number = 4,
volume = 2015,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1007/JHEP04(2015)079
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Works referenced in this record:

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    Detecting a boosted diboson resonance
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