The pNAB experiment and the quest for ever better neutron beam polarization
Por:
Baeßler S., Alarcon R., Barrón Palos L., Broussard L.J., Choi J.H., Chupp T., Crawford C.B., Dodson G., Fomin N., Fry J., Gonzalez F., Hamblen J., Hayen L., Jezghani A., Makela M., Mammei R., Mendelsohn A., Mueller P.E., Penttilä S., Pioquinto J.A., Plaster B., Pocanic D., Saunders A., Schreyer W., Young A.R.
Publicada:
1 ene 2025
Resumen:
The Nab and pNAB collaborations are conducting a program of studies of free neutron beta decay, with the primary goal of testing the unitarity of the Cabbibo-Kobayashi-Maskawa matrix that describes quark mixing due to the weak interaction. For this purpose, a large, novel electromagnetic spectrometer, the Nab spectrometer, has been designed, built, and placed in use to determine the correlation coefficients in unpolarized neutron beta decay: a, the neutrino–electron correlation coefficient; and b, the Fierz term. The subject of this paper is pNAB, the second phase of the program, that will deploy the same spectrometer with a polarized neutron beam to determine A, the beta asymmetry; and B, the neutrino asymmetry coefficients. A focus of this paper will be on the strategies to provide a high and precisely known neutron beam polarization. © Copyright owned by the author(s) under the terms of the Creative Commons.
Filiaciones:
Baeßler S.:
Department of Physics, University of Virginia, Charlottesville, 22904–4714, VA, United States
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Alarcon R.:
Department of Physics, Arizona State University, Tempe, 85287–1504, AZ, United States
Barrón Palos L.:
Instituto de Física, Universidad Nacional Autónoma de México, Mexico
Broussard L.J.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Choi J.H.:
Department of Physics, North Carolina State University, Raleigh, 27695-8202, NC, United States
Chupp T.:
University of Michigan, Ann Arbor, 48109, MI, United States
Crawford C.B.:
Department of Physics and Astronomy, University of Kentucky, Lexington, 40506, KY, United States
Dodson G.:
Massachusetts Institute of Technology, Cambridge, 02139, MA, United States
Fomin N.:
Department of Physics and Astronomy, University of Tennessee, Knoxville, 37996, TN, United States
Fry J.:
Department of Physics, Geosciences, and Astronomy, Eastern Kentucky University, Richmond, 40475, KY, United States
Gonzalez F.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Hamblen J.:
Department of Chemistry and Physics, Univ. of Tennessee-Chattanooga, Chattanooga, 37403, TN, United States
Hayen L.:
Laboratoire de Physique Corpusculaire, Caen, France
Jezghani A.:
Partnership for an Advanced Computing Environment, Georgia Institute of Technology, Atlanta, 30332, GA, United States
Makela M.:
Los Alamos National Laboratory, Los Alamos, 87545, NM, United States
Mammei R.:
Department of Physics, University of Winnipeg, Winnipeg, R3B2E9, MB, Canada
Mendelsohn A.:
Department of Physics and Astronomy, University of Manitoba, Winnipeg, R3T 2N2, MB, Canada
Mueller P.E.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Penttilä S.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Pioquinto J.A.:
Department of Physics, University of Virginia, Charlottesville, 22904–4714, VA, United States
Plaster B.:
Department of Physics and Astronomy, University of Kentucky, Lexington, 40506, KY, United States
Pocanic D.:
Department of Physics, University of Virginia, Charlottesville, 22904–4714, VA, United States
Saunders A.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Schreyer W.:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Young A.R.:
Department of Physics, North Carolina State University, Raleigh, 27695-8202, NC, United States
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