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Evidence for Neutral-Current Diffractive π
Wolcott, J; Aliaga, L; Altinok, O; Bercellie, A; Betancourt, M; Bodek, A; Bravar, A; Budd, H; Cai, T; Carneiro, M F; Chvojka, J; da Motta, H; Devan, J; Dytman, S A; Díaz, G A; Eberly, B; Endress, E; Felix, J; Fields, L; Fine, R; Galindo, R; Gallagher, H; Golan, T; Gran, R; Harris, D A; Higuera, A; Hurtado, K; Kiveni, M; Kleykamp, J; Kordosky, M; Le, T; Maher, E; Manly, S; Mann, W A; Marshall, C M; Martinez Caicedo, D A; McFarland, K S; McGivern, C L; McGowan, A M; Messerly, B; Miller, J; Mislivec, A; Morfín, J G; Mousseau, J; Naples, D; Nelson, J K; Norrick, A; Osta, J; Paolone, V; Park, J.
Affiliation
  • Wolcott J; University of Rochester, Rochester, New York 14627, USA.
  • Aliaga L; Physics Department, Tufts University, Medford, Massachusetts 02155, USA.
  • Altinok O; Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA.
  • Bercellie A; Physics Department, Tufts University, Medford, Massachusetts 02155, USA.
  • Betancourt M; University of Rochester, Rochester, New York 14627, USA.
  • Bodek A; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Bravar A; University of Rochester, Rochester, New York 14627, USA.
  • Budd H; University of Geneva, 1211 Geneva 4, Switzerland.
  • Cai T; University of Rochester, Rochester, New York 14627, USA.
  • Carneiro MF; University of Rochester, Rochester, New York 14627, USA.
  • Chvojka J; Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, Rio de Janeiro, Rio de Janeiro 22290-180, Brazil.
  • da Motta H; University of Rochester, Rochester, New York 14627, USA.
  • Devan J; Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, Rio de Janeiro, Rio de Janeiro 22290-180, Brazil.
  • Dytman SA; Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA.
  • Díaz GA; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
  • Eberly B; University of Rochester, Rochester, New York 14627, USA.
  • Endress E; Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Apartado 1761, Lima, Perú
  • Felix J; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
  • Fields L; Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Apartado 1761, Lima, Perú
  • Fine R; Campus León y Campus Guanajuato, Universidad de Guanajuato, Lascurain de Retana No. 5, Colonia Centro, Guanajuato, Guanajuato 36000, México.
  • Galindo R; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Gallagher H; Northwestern University, Evanston, Illinois 60208, USA.
  • Golan T; University of Rochester, Rochester, New York 14627, USA.
  • Gran R; Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680 Casilla 110-V, Valparaíso, Chile.
  • Harris DA; Physics Department, Tufts University, Medford, Massachusetts 02155, USA.
  • Higuera A; University of Rochester, Rochester, New York 14627, USA.
  • Hurtado K; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Kiveni M; Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA.
  • Kleykamp J; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Kordosky M; University of Rochester, Rochester, New York 14627, USA.
  • Le T; Campus León y Campus Guanajuato, Universidad de Guanajuato, Lascurain de Retana No. 5, Colonia Centro, Guanajuato, Guanajuato 36000, México.
  • Maher E; Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, Rio de Janeiro, Rio de Janeiro 22290-180, Brazil.
  • Manly S; Universidad Nacional de Ingeniería, Apartado 31139, Lima, Perú
  • Mann WA; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Marshall CM; University of Rochester, Rochester, New York 14627, USA.
  • Martinez Caicedo DA; Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA.
  • McFarland KS; Physics Department, Tufts University, Medford, Massachusetts 02155, USA.
  • McGivern CL; Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
  • McGowan AM; Massachusetts College of Liberal Arts, 375 Church Street, North Adams, Massachusetts 01247, USA.
  • Messerly B; University of Rochester, Rochester, New York 14627, USA.
  • Miller J; Physics Department, Tufts University, Medford, Massachusetts 02155, USA.
  • Mislivec A; University of Rochester, Rochester, New York 14627, USA.
  • Morfín JG; Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, Rio de Janeiro, Rio de Janeiro 22290-180, Brazil.
  • Mousseau J; University of Rochester, Rochester, New York 14627, USA.
  • Naples D; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Nelson JK; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
  • Norrick A; University of Rochester, Rochester, New York 14627, USA.
  • Nuruzzaman; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
  • Osta J; Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680 Casilla 110-V, Valparaíso, Chile.
  • Paolone V; University of Rochester, Rochester, New York 14627, USA.
Phys Rev Lett ; 117(11): 111801, 2016 Sep 09.
Article in En | MEDLINE | ID: mdl-27661679
ABSTRACT
The MINERvA experiment observes an excess of events containing electromagnetic showers relative to the expectation from Monte Carlo simulations in neutral-current neutrino interactions with mean beam energy of 4.5 GeV on a hydrocarbon target. The excess is characterized and found to be consistent with neutral-current π^{0} production with a broad energy distribution peaking at 7 GeV and a total cross section of 0.26±0.02(stat.)±0.08(sys.)×10^{-39} cm^{2}. The angular distribution, electromagnetic shower energy, and spatial distribution of the energy depositions of the excess are consistent with expectations from neutrino neutral-current diffractive π^{0} production from hydrogen in the hydrocarbon target. These data comprise the first direct experimental observation and constraint for a reaction that poses an important background process in neutrino-oscillation experiments searching for ν_{µ} to ν_{e} oscillations.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2016 Document type: Article Affiliation country: Estados Unidos
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2016 Document type: Article Affiliation country: Estados Unidos