Final results for the neutron \(\beta\)-asymmetry parameter \(A_0\) from the UCNA experiment

Final results for the neutron \(\beta\)-asymmetry parameter \(A_0\) from the UCNA experiment

The UCNA experiment was designed to measure the neutron \(\beta\)-asymmetry parameter \(A_0\) using polarized ultracold neutrons (UCN). UCN produced via downscattering in solid deuterium were polarized via transport through a 7 T magnetic field, and then directed to a 1 T solenoidal electron spectro...

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Veröffentlicht in:arXiv.org 2019-04
Hauptverfasser: Plaster, B, Adamek, E, Allgeier, B, Anaya, J, Back, H O, Bagdasarova, Y, Berguno, D B, Blatnik, M, Boissevain, J G, Bowles, T J, Broussard, L J, Brown, M A -P, Carr, R, Clark, D J, Clayton, S, Cude-Woods, C, Currie, S, Dees, E B, Ding, X, S Du, Filippone, B W, Garcia, A, Geltenbort, P, Hasan, S, Hawari, A, Hickerson, K P, Hill, R, Hino, M, Hoagland, J, Hoedl, S A, Hogan, G E, Hona, B, Hong, R, Holley, A T, Ito, T M, Kawai, T, Kirch, K, Kitagaki, S, Knecht, A, Lamoreaux, S K, C -Y Liu, Liu, J, Makela, M, Mammei, R R, Martin, J W, Meier, N, Melconian, D, Mendenhall, M P, Moore, S D, Morris, C L, Mortensen, R, Nepal, S, Nouri, N, Pattie, R W, A Perez Galvan, Phillips, D G, Pichlmaier, A, Picker, R, Pitt, M L, Ramsey, J C, Rios, R, Russell, R, Sabourov, K, Sallaska, A L, Salvat, D J, Saunders, A, Schmid, R, Seestrom, S J, Servicky, C, Sharapov, E I, Sjue, S K L, Slutsky, S, Smith, D, Sondheim, W E, Sun, X, Swank, C, Swift, G, Tatar, E, Teasdale, W, Terai, C, Tipton, B, Utsuro, M, Vogelaar, R B, VornDick, B, Wang, Z, Wehring, B, Wexler, J, Womack, T, Wrede, C, Xu, Y P, Yan, H, Young, A R, Yuan, J, Zeck, B A
Format: Artikel
Sprache:eng
Schlagworte:
Asymmetry
Deuterium
Experiments
Neutrons
Packages
Parameters
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Zusammenfassung:The UCNA experiment was designed to measure the neutron \(\beta\)-asymmetry parameter \(A_0\) using polarized ultracold neutrons (UCN). UCN produced via downscattering in solid deuterium were polarized via transport through a 7 T magnetic field, and then directed to a 1 T solenoidal electron spectrometer, where the decay electrons were detected in electron detector packages located on the two ends of the spectrometer. A value for \(A_0\) was then extracted from the asymmetry in the numbers of counts in the two detector packages. We summarize all of the results from the UCNA experiment, obtained during run periods in 2007, 2008--2009, 2010, and 2011--2013, which ultimately culminated in a 0.67\% precision result for \(A_0\).
ISSN:2331-8422
DOI:10.48550/arxiv.1904.05432