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Improved Limits on Millicharged Particles Using the ArgoNeuT Experiment at Fermilab.
Acciarri, R; Adams, C; Asaadi, J; Baller, B; Bolton, T; Bromberg, C; Cavanna, F; Edmunds, D; Fitzpatrick, R S; Fleming, B; Harnik, R; James, C; Lepetic, I; Littlejohn, B R; Liu, Z; Luo, X; Palamara, O; Scanavini, G; Soderberg, M; Spitz, J; Szelc, A M; Wu, W; Yang, T.
Affiliation
  • Acciarri R; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Adams C; Argonne National Lab, Lemont, Illinois 60439, USA.
  • Asaadi J; University of Texas at Arlington, Arlington, Texas 76019, USA.
  • Baller B; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Bolton T; Kansas State University, Manhattan, Kansas 66506, USA.
  • Bromberg C; Michigan State University, East Lansing, Michigan 48824, USA.
  • Cavanna F; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Edmunds D; Michigan State University, East Lansing, Michigan 48824, USA.
  • Fitzpatrick RS; University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Fleming B; Yale University, New Haven, Connecticut 06520, USA.
  • Harnik R; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • James C; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Lepetic I; Illinois Institute of Technology, Chicago, Illinois 60616, USA.
  • Littlejohn BR; Illinois Institute of Technology, Chicago, Illinois 60616, USA.
  • Liu Z; Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
  • Luo X; University of California, Santa Barbara, California 93106, USA.
  • Palamara O; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Scanavini G; Yale University, New Haven, Connecticut 06520, USA.
  • Soderberg M; Syracuse University, Syracuse, New York 13244, USA.
  • Spitz J; University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Szelc AM; University of Manchester, Manchester M13 9PL, United Kingdom.
  • Wu W; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
  • Yang T; Fermi National Accelerator Lab, Batavia, Illinois 60510, USA.
Phys Rev Lett ; 124(13): 131801, 2020 Apr 03.
Article in En | MEDLINE | ID: mdl-32302167
ABSTRACT
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 1.0×10^{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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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country: United States
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Add to My VHL
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XML
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country: United States