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Title: Detecting dark matter with far-forward emulsion and liquid argon detectors at the LHC

Abstract

New light particles may be produced in large numbers in the far-forward region at the LHC and then decay to dark matter, which can be detected through its scattering in far-forward experiments. We consider the example of invisibly decaying dark photons, which decay to dark matter through A' → χ χ . The dark matter may then be detected through its scattering off electrons χe → χe. We consider the discovery potential of detectors placed on the beam collision axis 480 m from the ATLAS interaction point, including an emulsion detector (FASER ν 2) and, for the first time, a Forward Liquid Argon Experiment (FLArE). For each of these detector technologies, we devise cuts that effectively separate the single e signal from the leading neutrino- and muon-induced backgrounds. We find that 10- to 100-tonne detectors may detect hundreds to thousands of dark matter events in the high-luminosity Large Hadron Collider (HL-LHC) era and will sensitively probe the thermal relic region of parameter space. These results motivate the construction of far-forward emulsion and liquid argon detectors at the LHC, as well as a suitable location to accommodate them, such as the proposed Forward Physics Facility.

Authors:
; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Univ. of Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); Science and Technology Facilities Council (STFC) (United Kingdom)
OSTI Identifier:
1783355
Alternate Identifier(s):
OSTI ID: 1851039
Grant/Contract Number:  
DE–SC0007914; SC0007914; PHY1915005; ST/ P000800/1
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 103 Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics; Neutrino interactions; Particle phenomena; Particle interactions; Particle dark matter; Particle astrophysics; Cosmic rays and astroparticles; Cosmology; Dark matter

Citation Formats

Batell, Brian, Feng, Jonathan L., and Trojanowski, Sebastian. Detecting dark matter with far-forward emulsion and liquid argon detectors at the LHC. United States: N. p., 2021. Web. doi:10.1103/PhysRevD.103.075023.
Batell, Brian, Feng, Jonathan L., & Trojanowski, Sebastian. Detecting dark matter with far-forward emulsion and liquid argon detectors at the LHC. United States. https://doi.org/10.1103/PhysRevD.103.075023
Batell, Brian, Feng, Jonathan L., and Trojanowski, Sebastian. Wed . "Detecting dark matter with far-forward emulsion and liquid argon detectors at the LHC". United States. https://doi.org/10.1103/PhysRevD.103.075023.
@article{osti_1783355,
title = {Detecting dark matter with far-forward emulsion and liquid argon detectors at the LHC},
author = {Batell, Brian and Feng, Jonathan L. and Trojanowski, Sebastian},
abstractNote = {New light particles may be produced in large numbers in the far-forward region at the LHC and then decay to dark matter, which can be detected through its scattering in far-forward experiments. We consider the example of invisibly decaying dark photons, which decay to dark matter through A' → χ χ . The dark matter may then be detected through its scattering off electrons χe– → χe–. We consider the discovery potential of detectors placed on the beam collision axis 480 m from the ATLAS interaction point, including an emulsion detector (FASER ν 2) and, for the first time, a Forward Liquid Argon Experiment (FLArE). For each of these detector technologies, we devise cuts that effectively separate the single e– signal from the leading neutrino- and muon-induced backgrounds. We find that 10- to 100-tonne detectors may detect hundreds to thousands of dark matter events in the high-luminosity Large Hadron Collider (HL-LHC) era and will sensitively probe the thermal relic region of parameter space. These results motivate the construction of far-forward emulsion and liquid argon detectors at the LHC, as well as a suitable location to accommodate them, such as the proposed Forward Physics Facility.},
doi = {10.1103/PhysRevD.103.075023},
journal = {Physical Review D},
number = 7,
volume = 103,
place = {United States},
year = {Wed Apr 21 00:00:00 EDT 2021},
month = {Wed Apr 21 00:00:00 EDT 2021}
}

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