New limit on T violation in neutron decay

We have measured the triple correlation D of the neutron polarisation and the momenta of electron and antineutrino, dW proportional to 1 + DP(p(e) x p((nu) over bar)), in neutron beta decay. Our result is D = [-2.8 +/- 6.4(stat) +/- 3.0(syst)] x 10(-4). The corresponding phase between g(A) and g(V) in V-A-theory follows as phi(AV) = 180.04degrees +/- 0.09degrees. This result improves the limit on a possible T violation in neutron beta decay. (C) 2003 Elsevier B.V. All rights reserved.