Measurement of the axial vector form factor from antineutrino-proton scattering.

Autor: Cai T; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA. tejinc@yorku.ca.; Department of Physics and Astronomy, York University, Toronto, Ontario, Canada. tejinc@yorku.ca., Moore ML; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.; Department of Physics, Stanford University, Stanford, CA, USA., Olivier A; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Akhter S; AMU Campus, Aligarh, India., Dar ZA; AMU Campus, Aligarh, India.; Department of Physics, William & Mary, Williamsburg, VA, USA., Ansari V; AMU Campus, Aligarh, India., Ascencio MV; Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru.; Iowa State University, Ames, IA, USA., Bashyal A; Department of Physics, Oregon State University, Corvallis, OR, USA.; High Energy Physics/Center for Computational Excellence Department, Argonne National Laboratory, Lemont, IL, USA., Bercellie A; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Betancourt M; Fermi National Accelerator Laboratory, Batavia, IL, USA., Bodek A; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Bonilla JL; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico., Bravar A; University of Geneva, Geneva, Switzerland., Budd H; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Caceres G; Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil.; Department of Physics and Astronomy, University of California at Davis, Davis, CA, USA., Carneiro MF; Department of Physics, Oregon State University, Corvallis, OR, USA.; Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil.; Brookhaven National Laboratory, Upton, NY, USA., Díaz GA; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., da Motta H; Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil., Felix J; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico., Fields L; Department of Physics, University of Notre Dame, Notre Dame, IN, USA., Filkins A; Department of Physics, William & Mary, Williamsburg, VA, USA., Fine R; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.; Los Alamos National Laboratory, Los Alamos, NM, USA., Gago AM; Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru., Gallagher H; Physics Department, Tufts University, Medford, MA, USA., Gilligan SM; Department of Physics, Oregon State University, Corvallis, OR, USA., Gran R; Department of Physics, University of Minnesota - Duluth, Duluth, MN, USA., Granados E; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico., Harris DA; Department of Physics and Astronomy, York University, Toronto, Ontario, Canada.; Fermi National Accelerator Laboratory, Batavia, IL, USA., Henry S; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Jena D; Fermi National Accelerator Laboratory, Batavia, IL, USA., Jena S; Department of Physical Sciences, IISER Mohali, Mohali, India., Kleykamp J; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.; Department of Physics and Astronomy, University of Mississippi, Oxford, MS, USA., Klustová A; The Blackett Laboratory, Imperial College London, London, UK., Kordosky M; Department of Physics, William & Mary, Williamsburg, VA, USA., Last D; Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA., Le T; Physics Department, Tufts University, Medford, MA, USA., Lozano A; Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil., Lu XG; Department of Physics, University of Warwick, Coventry, UK.; Department of Physics, University of Oxford, Oxford, UK., Maher E; Massachusetts College of Liberal Arts, North Adams, MA, USA., Manly S; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Mann WA; Physics Department, Tufts University, Medford, MA, USA., Mauger C; Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA., McFarland KS; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA. kevin@rochester.edu., Messerly B; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA.; University of Minnesota, Minneapolis, MN, USA., Miller J; Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile., Moreno O; Department of Physics, William & Mary, Williamsburg, VA, USA.; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico., Morfín JG; Fermi National Accelerator Laboratory, Batavia, IL, USA., Naples D; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA., Nelson JK; Department of Physics, William & Mary, Williamsburg, VA, USA., Nguyen C; Department of Physics, University of Florida, Gainesville, FL, USA., Paolone V; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA., Perdue GN; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.; Fermi National Accelerator Laboratory, Batavia, IL, USA., Plows KJ; Department of Physics, University of Oxford, Oxford, UK., Ramírez MA; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico.; Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA., Ransome RD; Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Ray H; Department of Physics, University of Florida, Gainesville, FL, USA., Ruterbories D; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Schellman H; Department of Physics, Oregon State University, Corvallis, OR, USA., Salinas CJS; Facultad de Ciencias, Universidad Nacional de Ingeniería, Lima, Peru., Su H; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA., Sultana M; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Syrotenko VS; Physics Department, Tufts University, Medford, MA, USA., Valencia E; Department of Physics, William & Mary, Williamsburg, VA, USA.; Campus León y Campus Guanajuato, Universidad de Guanajuato, Guanajuato, Mexico., Vaughan NH; Department of Physics, Oregon State University, Corvallis, OR, USA., Waldron AV; The Blackett Laboratory, Imperial College London, London, UK.; School of Physical and Chemical Sciences, Queen Mary University of London, London, United Kingdom., Wascko MO; The Blackett Laboratory, Imperial College London, London, UK., Wret C; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA., Yaeggy B; Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile.; Department of Physics, University of Cincinnati, Cincinnati, OH, USA., Zazueta L; Department of Physics, William & Mary, Williamsburg, VA, USA.
Jazyk: angličtina
Zdroj: Nature [Nature] 2023 Feb; Vol. 614 (7946), pp. 48-53. Date of Electronic Publication: 2023 Feb 01.
DOI: 10.1038/s41586-022-05478-3
Abstrakt: Scattering of high energy particles from nucleons probes their structure, as was done in the experiments that established the non-zero size of the proton using electron beams 1 . The use of charged leptons as scattering probes enables measuring the distribution of electric charges, which is encoded in the vector form factors of the nucleon 2 . Scattering weakly interacting neutrinos gives the opportunity to measure both vector and axial vector form factors of the nucleon, providing an additional, complementary probe of their structure. The nucleon transition axial form factor, F A , can be measured from neutrino scattering from free nucleons, ν μ n → μ - p and [Formula: see text], as a function of the negative four-momentum transfer squared (Q 2 ). Up to now, F A (Q 2 ) has been extracted from the bound nucleons in neutrino-deuterium scattering 3-9 , which requires uncertain nuclear corrections 10 . Here we report the first high-statistics measurement, to our knowledge, of the [Formula: see text] cross-section from the hydrogen atom, using the plastic scintillator target of the MINERvA 11 experiment, extracting F A from free proton targets and measuring the nucleon axial charge radius, r A , to be 0.73 ± 0.17 fm. The antineutrino-hydrogen scattering presented here can access the axial form factor without the need for nuclear theory corrections, and enables direct comparisons with the increasingly precise lattice quantum chromodynamics computations 12-15 . Finally, the tools developed for this analysis and the result presented are substantial advancements in our capabilities to understand the nucleon structure in the weak sector, and also help the current and future neutrino oscillation experiments 16-20 to better constrain neutrino interaction models.
(© 2023. The Author(s).)
Databáze: MEDLINE
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