Abstract

The neutron is the simplest nuclear system that can be used to probe the structure of the weak interaction and search for physics beyond the standard model. Measurements of neutron lifetime and β-decay correlation coefficients with precisions of 0.02% and 0.1%, respectively, would allow for stringent constraints on new physics. The UCNτ experiment uses an asymmetric magneto-gravitational UCN trap with in situ counting of surviving neutrons to measure the neutron lifetime, τn = 877.7s (0.7s)stat (+0.4/−0.2s)sys. We discuss the recent result from UCNτ, the status of ongoing data collection and analysis, and the path toward a 0.25 s measurement of the neutron lifetime with UCNτ.

Details

Title
Status of the UCNτ experiment
Author
Pattie, RW, Jr; Callahan, N B; Cude-Woods, C; Adamek, E R; Adams, M; Barlow, D; Blatnik, M; Bowman, D; Broussard, L J; Clayton, S; Currie, S; Dees, E B; Ding, X; Fellers, D; Fox, W; Fries, E; Gonzalez, F; Geltenbort, P; Hickerson, K P; MA Hoffbauer; Hoffman, K; Holley, A T; Howard, D; Ito, T M; Komives, A; Liu, CY; Makela, M; Medina, J; Morley, D; Morris, CL; O'Connor, T; Penttilä, SI; Ramsey, J C; Roberts, A; Salvat, D; Saunders, A; Seestrom, S J; Sharapov, E I; Sjue, SKL; Snow, WM; Sprow, A; Vanderwerp, J; Vogelaar, B; Walstrom, P L; Wang, Z; Weaver, H; Wexler, J; Womack, T L; Young, A R; Zeck, BA
Section
Measurements of the Free Neutron Lifetime
Publication year
2019
Publication date
2019
Publisher
EDP Sciences
ISSN
21016275
e-ISSN
2100014X
Source type
Conference Paper
Language of publication
English
DOI
https://doi.org/10.1051/epjconf/201921903004
ProQuest document ID
2345583813
Copyright
© 2019. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and conditions, you may use this content in accordance with the terms of the License.