Neutrino factory physics study status and an entry level scenario

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The status of an ongoing neutrino factory physics study at Fermilab is described, together with a personal view of the parameters required for an entry-level neutrino factory. Recent measurements of atmospheric muon neutrino ({nu}{sub {mu}}) fluxes from the Super-Kamiokande (SuperK) collaboration have shown an aximuth-dependent {r{underscore}arrow} baseline dependent-depletion that strongly suggests neutrino oscillations of the type {nu}{sub {mu}} {r{underscore}arrow} {nu}{sub {mu}}. Since the atmospheric {nu}{sub e} flux is not similarly depleted, {nu}{sub x} cannot be {nu}{sub e}, and must therefore be either {nu}{sub {tau}}, or {nu}{sub s} (a sterile neutrino). These observations have inspired many theoretical papers, several neutrino oscillation ... continued below

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14 pages

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Geer, S. February 1, 2000.

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Description

The status of an ongoing neutrino factory physics study at Fermilab is described, together with a personal view of the parameters required for an entry-level neutrino factory. Recent measurements of atmospheric muon neutrino ({nu}{sub {mu}}) fluxes from the Super-Kamiokande (SuperK) collaboration have shown an aximuth-dependent {r{underscore}arrow} baseline dependent-depletion that strongly suggests neutrino oscillations of the type {nu}{sub {mu}} {r{underscore}arrow} {nu}{sub {mu}}. Since the atmospheric {nu}{sub e} flux is not similarly depleted, {nu}{sub x} cannot be {nu}{sub e}, and must therefore be either {nu}{sub {tau}}, or {nu}{sub s} (a sterile neutrino). These observations have inspired many theoretical papers, several neutrino oscillation experiments proposals, and much interest in the physics community. This interest is well motivated. Understanding the neutrino-mass hierarchy and the mixing matrix that drives flavor oscillations may provide clues that lead to a deeper understanding of physics at very high mass-scales and insights into the physics associated with the existence of more than one lepton flavor. Hence, there is a strong incentive to find a way of measuring the neutrino flavor mixing matrix, confirm and oscillation scheme (three-flavor mixing, four-flavor, n-flavor ?), and determine which mass eigenstate is the heaviest (and which is the lightest). This will require a further generation of accelerator based experiments beyond those currently proposed.

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14 pages

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  • High Intensity Muon Sources, KEK, Tsukuba (JP), 12/01/1999--12/03/1999

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  • Report No.: FERMILAB--Conf-00/016-T
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 750840
  • Archival Resource Key: ark:/67531/metadc707620

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  • February 1, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 1, 2016, 4:20 p.m.

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Geer, S. Neutrino factory physics study status and an entry level scenario, article, February 1, 2000; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc707620/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.