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Title: Study of quasielastic scattering using charged-current ν μ-iron interactions in the MINOS near detector

Kinematic distributions from an inclusive sample of 1.41×10 6 charged-current ν μ interactions on iron, obtained using the MINOS near detector exposed to a wide-band beam with peak flux at 3 GeV, are compared to a conventional treatment of neutrino scattering within a Fermi gas nucleus. Results are also used to guide the selection of a subsample enriched in quasielastic ν μFe interactions, containing an estimated 123,000 quasielastic events of incident energies 1 < E ν < 8 GeV, with < E ν > = 2.79 GeV. Four additional subsamples representing topological and kinematic sideband regions to quasielastic scattering are also selected for the purpose of evaluating backgrounds. Comparisons using subsample distributions in four-momentum transfer Q 2 show the Monte Carlo model to be inadequate at low Q 2. Its shortcomings are remedied via inclusion of a Q 2-dependent suppression function for baryon resonance production, developed from the data. A chi-square fit of the resulting Monte Carlo simulation to the shape of the Q 2 distribution for the quasielastic-enriched sample is carried out with the axial-vector mass M A of the dipole axial-vector form factor of the neutron as a free parameter. Furthermore, the effective M A which best describesmore » the data is 1.23 +0.13 -0.09(fit) +0.12 -0.15(syst) GeV.« less
Authors:
 [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-14-401-E
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1410.8613; TRN: US1601148
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 91; Journal Issue: 01; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
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 Orgs:
MINOS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1226301
Alternate Identifier(s):
OSTI ID: 1181052