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Title: Neutron Measurements from Anti-Neutrino Hydrocarbon Reactions

Abstract

Charged-current anti-neutrino interactions on hydrocarbon scintillator in the MINERvA detector are used to study activity from their final-state neutrons. To ensure that most of the neutrons are from the primary interaction, rather than hadronic reinteractions in the detector, the sample is limited to momentum transfers below 0.8 GeV/c. From 16,129 interactions, 15,246 neutral particle candidates are observed. The reference simulation predicts 64\% of these candidates are due to neutrons from the anti-neutrino interaction directly, but also overpredicts the number of candidates by 15\% overall, which is beyond the standard uncertainty estimates for models of neutrino interactions and neutron propagation in the detector. Using the measured distributions for energy deposition, time of flight, position, and speed, we explore the sensitivity to the details those two aspects of the models. We also use multiplicity distributions to evaluate the presence of a two-nucleon knockout process. These results provide critical new information toward a complete description of the hadronic final state of neutrino interactions, which is vital to neutrino oscillation experiments.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
MINERvA
OSTI Identifier:
1560719
Alternate Identifier(s):
OSTI ID: 1527432
Report Number(s):
arXiv:1901.04892; FERMILAB-PUB-19-014-ND
1713807
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: D100; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Elkins, M., and et al. Neutron Measurements from Anti-Neutrino Hydrocarbon Reactions. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.052002.
Elkins, M., & et al. Neutron Measurements from Anti-Neutrino Hydrocarbon Reactions. United States. doi:10.1103/PhysRevD.100.052002.
Elkins, M., and et al. Fri . "Neutron Measurements from Anti-Neutrino Hydrocarbon Reactions". United States. doi:10.1103/PhysRevD.100.052002.
@article{osti_1560719,
title = {Neutron Measurements from Anti-Neutrino Hydrocarbon Reactions},
author = {Elkins, M. and et al.},
abstractNote = {Charged-current anti-neutrino interactions on hydrocarbon scintillator in the MINERvA detector are used to study activity from their final-state neutrons. To ensure that most of the neutrons are from the primary interaction, rather than hadronic reinteractions in the detector, the sample is limited to momentum transfers below 0.8 GeV/c. From 16,129 interactions, 15,246 neutral particle candidates are observed. The reference simulation predicts 64\% of these candidates are due to neutrons from the anti-neutrino interaction directly, but also overpredicts the number of candidates by 15\% overall, which is beyond the standard uncertainty estimates for models of neutrino interactions and neutron propagation in the detector. Using the measured distributions for energy deposition, time of flight, position, and speed, we explore the sensitivity to the details those two aspects of the models. We also use multiplicity distributions to evaluate the presence of a two-nucleon knockout process. These results provide critical new information toward a complete description of the hadronic final state of neutrino interactions, which is vital to neutrino oscillation experiments.},
doi = {10.1103/PhysRevD.100.052002},
journal = {Phys.Rev.},
number = 5,
volume = D100,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.100.052002

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