Mumm, H.
, Chupp, T.
, Coulter, K.
, Cooper, R.
, Freedman, S.
, Fujikawa, B.
, Garcia, A.
, Jones, G.
, Nico, J.
, Thompson, A.
, Trull, C.
, Wilkerson, J.
and Wiefeldt, F.
(2012),
A New Limit on Time-Reversal Violation in Beta Decay, Physical Review Letters (Accessed May 9, 2026)
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A New Limit on Time-Reversal Violation in Beta Decay
Published
Author(s)
, T E. Chupp, K P. Coulter, R L. Cooper, S J. Freedman, B. K. Fujikawa, A. Garcia, Gordon L. Jones, , , C A. Trull, J. F. Wilkerson, F. E. Wiefeldt
Abstract
We report the results of an improved determination of the triple correlation DP (p_e × p_v) that can be used to limit possible time-reversal invariance in the beta decay of polarized neutrons and constrain extensions to the Standard Model. Our result is D = (-0.96 ± 1.89(stat) ± 1.01(sys)) × 10e-4. The corresponding phase between g_A and g_V is 180.013 ± 0.028 degrees (68% confidence level). This result represents the most sensitive measurement of D in nuclear beta decay.Citation
Physical Review Letters
Volume
107
Pub Type
Journals
Keywords
baryon asymmetry, neutron decay, symmetries, time-reversal
Citation
Issues
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Created September 2, 2012, Updated February 19, 2017