@article{0053ed16f243475a9b5f07b3066c4e0e,
title = "First direct constraints on Fierz interference in free-neutron β decay",
abstract = "Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term bn, which is particularly sensitive to beyond-standard-model tensor currents at the TeV scale, has thus far eluded measurement. Here we report the first direct constraints on this term, finding bn=0.067±0.005stat-0.061+0.090sys, consistent with the standard model. The uncertainty is dominated by absolute energy reconstruction and the linearity of the β spectrometer energy response.",
author = "{UCNA Collaboration} and Hickerson, {K. P.} and X. Sun and Y. Bagdasarova and D. Bravo-Bergu{\~n}o and Broussard, {L. J.} and Brown, {M. A.P.} and R. Carr and S. Currie and X. Ding and Filippone, {B. W.} and A. Garc{\'i}a and P. Geltenbort and J. Hoagland and Holley, {A. T.} and R. Hong and Ito, {T. M.} and A. Knecht and Liu, {C. Y.} and Liu, {J. L.} and M. Makela and Mammei, {R. R.} and Martin, {J. W.} and D. Melconian and Mendenhall, {M. P.} and Moore, {S. D.} and Morris, {C. L.} and Pattie, {R. W.} and {P{\'e}rez Galv{\'a}n}, A. and R. Picker and Pitt, {M. L.} and B. Plaster and Ramsey, {J. C.} and R. Rios and A. Saunders and Seestrom, {S. J.} and Sharapov, {E. I.} and Sondheim, {W. E.} and E. Tatar and Vogelaar, {R. B.} and B. Vorndick and C. Wrede and Young, {A. R.} and Zeck, {B. A.}",
note = "Funding Information: This work is supported in part by the US Department of Energy, Office of Nuclear Physics (DE-FG02-08ER41557, DE-SC0014622, DE-FG02-97ER41042) and the National Science Foundation (Grants No. NSF-0653222, No. NSF-0700491, No. NSF-0855538, No. NSF-1002814, No. NSF-1005233, No. NSF-1205977, No. NSF-1306997, No. NSF-1307426, No. 1506459, and No. NSF-1615153). We gratefully acknowledge the support of the LDRD program (20110043DR), and the LANSCE and AOT divisions of the Los Alamos National Laboratory. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = oct,
day = "30",
doi = "10.1103/PhysRevC.96.042501",
language = "English (US)",
volume = "96",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "4",
}