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Title: Millicharged particles in liquid argon neutrino experiments

Journal Article · · Journal of High Energy Physics (Online)
 [1]; ORCiD logo [2];  [1]
  1. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
  2. Univ. of Maryland, College Park, MD (United States). Dept. of Physics

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.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1529345
Report Number(s):
arXiv:1902.03246; FERMILAB-PUB-19-060-ND-T; 1719360
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 7 Vol. 2019; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Probing the Higgs portal at the Fermilab short-baseline neutrino experiments journal December 2019
Reviving millicharged dark matter for 21-cm cosmology journal December 2019
Probing the Higgs Portal at the Fermilab Short-Baseline Neutrino Experiments text January 2019