New limit on the D coefficient in polarized neutron decay - art. no. 055501

We describe an experiment that has set new limits on the time reversal inva riance violating D coefficient in neutron beta decay. The emiT experiment m easured the angular correlation [J] . (p(e) x p(p)) using an octagonal symm etry that optimizes electron-proton coincidence rates. The result is D=[-0. 6+/-1.2(stat)+/-0.5(syst)] x 10(-3). This improves constraints on the phase of g(A)/g(V) and limits contributions to T violation due to leptoquarks. T his paper presents details of the experiment, data analysis, and the invest igation of systematic effects.