Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Experiment
Journal Article
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· Physical Review Letters
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- Illinois Institute of Technology
- Fermi National Accelerator Laboratory
- University of Texas at Arlington
- Universidade Federal de Goiás
- Yale University
- University of Chicago
- Boston University
- Universidade Estadual de Campinas
- University of California
- Universidade Federal do ABC
- Syracuse University
- University of Edinburgh
We report the measurement of the final-state products of negative pion and muon nuclear capture at rest on argon by the LArIAT experiment at the Fermilab Test Beam Facility. We measure a population of isolated MeV-scale energy depositions, or blips, in 296 LArIAT events containing tracks from stopping low-momentum pions and muons. The average numbers of visible blips are measured to be 0.74 ± 0.19 and 1.86 ± 0.17 near muon and pion track endpoints, respectively. The 3.6𝜎 statistically significant difference in blip content between muons and pions provides the first demonstration of a new method of pion-muon discrimination in neutrino liquid argon time projection chamber experiments. LArIAT Monte Carlo simulations predict substantially higher average blip counts for negative muon (1.22 ± 0.08) and pion (2.34 ± 0.09) nuclear captures. We attribute this difference to geant4’s inaccurate simulation of the nuclear capture process.
- Research Organization:
- Boston Univ., MA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- 89243024CSC000002; AC02-07CH11359; SC0015628
- OSTI ID:
- 2545100
- Alternate ID(s):
- OSTI ID: 2434033
OSTI ID: 3011365
- Report Number(s):
- FERMILAB-PUB--24-0455-PPD
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 134; ISSN 1079-7114; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Test Beam Experiment
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Tue Jul 09 00:00:00 EDT 2024
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OSTI ID:2396940