Millicharged particles in liquid argon neutrino experiments
Abstract
We investigate the potential of Liquid Argon (LAr) neutrino detectors to search for millicharged particles, a well-motivated extension of the standard model. Detectors located downstream of an intense proton beam that is striking a target may be exposed to a large flux of millicharged particles. Millicharged particles interact primarily through low momentum exchange producing electron recoil events near detector threshold. Recently, sub-MeV detection capabilities were demonstrated by the Fermilab ArgoNeuT detector, a small LAr detector which was exposed to the NuMI neutrino beam. Despite high background rates and its small size, we show that ArgoNeuT is capable of probing unexplored parameter space with its existing dataset. In particular, we show that the excellent spatial resolution in LAr detectors allows rejecting backgrounds by requiring two soft hits that are aligned with the upstream target. We further discuss the prospects of these types of searches in future larger LAr neutrino detectors such as the DUNE near detector.
- Authors:
-
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Univ. of Maryland, College Park, MD (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1529345
- Report Number(s):
- arXiv:1902.03246; FERMILAB-PUB-19-060-ND-T
Journal ID: ISSN 1029-8479; 1719360
- Grant/Contract Number:
- AC02-07CH11359
- 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: 2019; Journal Issue: 7; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Harnik, Roni, Liu, Zhen, and Palamara, Ornella. Millicharged particles in liquid argon neutrino experiments. United States: N. p., 2019.
Web. doi:10.1007/JHEP07(2019)170.
Harnik, Roni, Liu, Zhen, & Palamara, Ornella. Millicharged particles in liquid argon neutrino experiments. United States. https://doi.org/10.1007/JHEP07(2019)170
Harnik, Roni, Liu, Zhen, and Palamara, Ornella. Mon .
"Millicharged particles in liquid argon neutrino experiments". United States. https://doi.org/10.1007/JHEP07(2019)170. https://www.osti.gov/servlets/purl/1529345.
@article{osti_1529345,
title = {Millicharged particles in liquid argon neutrino experiments},
author = {Harnik, Roni and Liu, Zhen and Palamara, Ornella},
abstractNote = {We investigate the potential of Liquid Argon (LAr) neutrino detectors to search for millicharged particles, a well-motivated extension of the standard model. Detectors located downstream of an intense proton beam that is striking a target may be exposed to a large flux of millicharged particles. Millicharged particles interact primarily through low momentum exchange producing electron recoil events near detector threshold. Recently, sub-MeV detection capabilities were demonstrated by the Fermilab ArgoNeuT detector, a small LAr detector which was exposed to the NuMI neutrino beam. Despite high background rates and its small size, we show that ArgoNeuT is capable of probing unexplored parameter space with its existing dataset. In particular, we show that the excellent spatial resolution in LAr detectors allows rejecting backgrounds by requiring two soft hits that are aligned with the upstream target. We further discuss the prospects of these types of searches in future larger LAr neutrino detectors such as the DUNE near detector.},
doi = {10.1007/JHEP07(2019)170},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2019,
place = {United States},
year = {Mon Jul 29 00:00:00 EDT 2019},
month = {Mon Jul 29 00:00:00 EDT 2019}
}
Web of Science
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