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Title: Jet substructure from dark sector showers

Abstract

We examine the robustness of collider phenomenology predictions for a dark sector scenario with QCD-like properties. Pair production of dark quarks at the LHC can result in a wide variety of signatures, depending on the details of the new physics model. A particularly challenging signal results when prompt production induces a parton shower that yields a high multiplicity of collimated dark hadrons with subsequent decays to Standard Model hadrons. The final states contain jets whose substructure encodes their non-QCD origin. This is a relatively subtle signature of strongly coupled beyond the Standard Model dynamics, and thus it is crucial that analyses incorporate systematic errors to account for the approximations that are being made when modeling the signal. We estimate theoretical uncertainties for a canonical substructure observable designed to be sensitive to the gauge structure of the underlying object, the two-point energy correlator $$$$ {e}_2^{\left(\beta \right)} $$$$ e 2 β , by computing envelopes between resummed analytic distributions and numerical results from Pythia. We explore the separability against the QCD background as the confinement scale, number of colors, number of flavors, and dark quark masses are varied. Additionally, we investigate the uncertainties inherent to modeling dark sector hadronization. Simple estimates are provided that quantify one’s ability to distinguish these dark sector jets from the overwhelming QCD background. Such a search would benefit from theory advances to improve the predictions, and the increase in statistics using the data to be collected at the high luminosity LHC.

Authors:
ORCiD logo [1];  [1];  [2]
+ Show Author Affiliations
  1. Univ. of Oregon, Eugene, OR (United States)
  2. Rutgers Univ., Piscataway, NJ (United States)
Publication Date:
Research Org.:
Univ. of Oregon, Eugene, OR (United States); Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); German Research Foundation (DFG)
OSTI Identifier:
1712431
Alternate Identifier(s):
OSTI ID: 1838031; OSTI ID: 1905897
Grant/Contract Number:  
SC0011640; SC0010008; EXC-2094 39078331
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: 2020; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Resummation

Citation Formats

Cohen, Timothy, Doss, Joel, and Freytsis, Marat. Jet substructure from dark sector showers. United States: N. p., 2020. Web. doi:10.1007/jhep09(2020)118.
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Cohen, Timothy, Doss, Joel, & Freytsis, Marat. Jet substructure from dark sector showers. United States. https://doi.org/10.1007/jhep09(2020)118
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Cohen, Timothy, Doss, Joel, and Freytsis, Marat. Thu . "Jet substructure from dark sector showers". United States. https://doi.org/10.1007/jhep09(2020)118. https://www.osti.gov/servlets/purl/1712431.
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@article{osti_1712431,
title = {Jet substructure from dark sector showers},
author = {Cohen, Timothy and Doss, Joel and Freytsis, Marat},
abstractNote = {We examine the robustness of collider phenomenology predictions for a dark sector scenario with QCD-like properties. Pair production of dark quarks at the LHC can result in a wide variety of signatures, depending on the details of the new physics model. A particularly challenging signal results when prompt production induces a parton shower that yields a high multiplicity of collimated dark hadrons with subsequent decays to Standard Model hadrons. The final states contain jets whose substructure encodes their non-QCD origin. This is a relatively subtle signature of strongly coupled beyond the Standard Model dynamics, and thus it is crucial that analyses incorporate systematic errors to account for the approximations that are being made when modeling the signal. We estimate theoretical uncertainties for a canonical substructure observable designed to be sensitive to the gauge structure of the underlying object, the two-point energy correlator $$ {e}_2^{\left(\beta \right)} $$ e 2 β , by computing envelopes between resummed analytic distributions and numerical results from Pythia. We explore the separability against the QCD background as the confinement scale, number of colors, number of flavors, and dark quark masses are varied. Additionally, we investigate the uncertainties inherent to modeling dark sector hadronization. Simple estimates are provided that quantify one’s ability to distinguish these dark sector jets from the overwhelming QCD background. Such a search would benefit from theory advances to improve the predictions, and the increase in statistics using the data to be collected at the high luminosity LHC.},
doi = {10.1007/jhep09(2020)118},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2020,
place = {United States},
year = {Thu Sep 17 00:00:00 EDT 2020},
month = {Thu Sep 17 00:00:00 EDT 2020}
}
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https://doi.org/10.1007/jhep09(2020)118
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    Works referencing / citing this record:

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    Perturbative benchmark models for a dark shower search program
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    Multi-scalar signature of self-interacting dark matter in the NMSSM and beyond
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