期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.131801
关键词
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资金
- U.S. Department of Energy, Office of Science, Office of High Energy Physics [DE-AC02-07CH11359]
- Department of Energy
- National Science Foundation
- Neutrino Physics Center (NPC) Scholar program at Fermilab
- ARCS Foundation, Inc.
- Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation Royal Society
- NSF [PHY1620074]
- Maryland Center for Fundamental Physics
- Fermilab
- STFC [ST/N000234/1] Funding Source: UKRI
A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT liquid argon time projection chamber detector enables a search for millicharged particles through the detection of visible electron recoils. We search for an event signature with two soft hits (MeV-scale energy depositions) aligned with the upstream target. For an exposure of the detector of 1.0 x 10(20) protons on target, one candidate event has been observed, compatible with the expected background. This search is sensitive to millicharged particles with charges between 10(-3)e and 10(-1)e and with masses in the range from 0.1 to 3 GeV. This measurement provides leading constraints on millicharged particles in this large unexplored parameter space region.
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