Searching for time reversal invariance violation in polarized neutron decay

E G Wasserman,F E Wietfeldt ,W A Teasdale,J F Wilkerson,G L Jones ,A K Thompson ,T J Bowles,K P Coulter ,L J Lising,Jean Adams ,S J Freedman ,Hamish Robertson ,S R Elliott ,M S Dewey ,J Anaya ,Thomas Steiger ,Geoffrey L Greene ,B K Fujikawa,S R Hwang ,T E Chupp ,J S Nico ,A Garcı́a

doi:10.1063/1.54330

Searching for time reversal invariance violation in polarized neutron decay

E G Wasserman, F E Wietfeldt + Show 20 more

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https://doi.org/10.1063/1.54330

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Publication Date: Jan 1, 1997

Affiliation: Lawrence Berkeley National Laboratory, Los Alamos National Laboratory, University of Washington, National Institute of Standards and Technology

#Time Reversal Invariance Violation #Indication Of New Physics + Show 8 more

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Abstract

Time reversal invariance violation is tightly constrained in the Standard Model, and the existence of a T-violating effect above the predicted level would be an indication of new physics. A sensitive probe of this symmetry in the weak interaction is the measurement of the D-coefficient in neutron decay. This parameter characterizes the triple-correlation of neutron spin, electron momentum, and neutrino (or proton) momentum, which changes sign under time reversal. The emiT experiment, now on line, attempts to improve the measurement of D, whose current average is 0.3±1.5×10−3.

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