| Texto completo | |
| Autor(es): Mostrar menos - |
Hernandez-Morquecho, M. A.
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Acciarri, R.
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Asaadi, J.
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Backfish, M.
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Badgett, W.
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Basque, V.
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Blaszczyk, F. d. M.
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Foreman, W.
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Gomes, R. A.
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Gramellini, E.
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Ho, J.
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Kearns, E.
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Kemp, E.
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Kobilarcik, T.
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King, M.
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Littlejohn, B. R.
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Luo, X.
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Marchionni, A.
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Moura, C. A.
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Raaf, J. L.
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Schmitz, D. W.
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Soderberg, M.
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John, J. M. St.
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Szelc, A. M.
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Yang, T.
Número total de Autores: 25
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| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review Letters; v. 134, n. 13, p. 8-pg., 2025-04-01. |
| Resumo | |
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 3.6 sigma 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. (AU) | |
| Processo FAPESP: | 16/22738-0 - Desenvolvimento de detectores de argônio líquido para física de neutrinos |
| Beneficiário: | Ernesto Kemp |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |