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Study of quasielastic scattering using charged-current nu_mu-iron interactions in the MINOS Near Detector

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arxiv 1410.8613 v3 pith:ZSTGJW4B submitted 2014-10-31 hep-ex

Study of quasielastic scattering using charged-current nu_mu-iron interactions in the MINOS Near Detector

P. Adamson , I. Anghel , A. Aurisano , G. Barr , M. Bishai , A. Blake , G. J. Bock , D. Bogert
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S. V. Cao C. M. Castromonte S. Childress J. A. B. Coelho L. Corwin D. Cronin-Hennessy J. K. de Jong A. V. Devan N. E. Devenish M. V. Diwan C. O. Escobar J. J. Evans E. Falk G. J. Feldman M. V. Frohne H. R. Gallagher R. A. Gomes M. C. Goodman P. Gouffon N. Graf R. Gran K. Grzelak A. Habig S. R. Hahn J. Hartnell R. Hatcher A. Holin J. Huang J. Hylen G. M. Irwin Z. Isvan C. James D. Jensen T. Kafka S. M. S. Kasahara G. Koizumi M. Kordosky A. Kreymer K. Lang J. Ling P. J. Litchfield P. Lucas W. A. Mann M. L. Marshak N. Mayer C. McGivern M. M. Medeiros R. Mehdiyev J. R. Meier M. D. Messier W. H. Miller S. R. Mishra S. Moed Sher C. D. Moore L. Mualem J. Musser D. Naples J. K. Nelson H. B. Newman R. J. Nichol J. A. Nowak J. O Connor M. Orchanian R. B. Pahlka J. Paley R. B. Patterson G. Pawloski A. Perch M. Pfutzner S. Phan-Budd R. K. Plunkett N. Poonthottathil X. Qiu A. Radovic B. Rebel C. Rosenfeld H. A. Rubin M. C. Sanchez J. Schneps A. Schreckenberger P. Schreiner R. Sharma A. Sousa N. Tagg R. L. Talaga J. Thomas M. A. Thomson X. Tian A. Timmons S. C. Tognini R. Toner D. Torretta J. Urheim P. Vahle B. Viren J. J. Walding A. Weber R. C. Webb C. White L. Whitehead L. H. Whitehead S. G. Wojcicki R. Zwaska
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classification hep-ex
keywords quasielasticinteractionsscatteringaxial-vectorcarlocharged-currentdatadetector
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Kinematic distributions from an inclusive sample of 1.41 x 10^6 charged-current nu_mu 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 used to guide the selection of a subsample enriched in quasielastic nu_mu Fe interactions, containing an estimated 123,000 quasielastic events of incident energies 1 < E_nu < 8 GeV, with <E_nu> = 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. The effective M_A which best describes the data is 1.23 +0.13/-0.09 (fit) +0.12/-0.15 (syst.) GeV.

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