  We motivate undertaking precision analyses of neutron decays to look for
signatures of new scalar and tensor interactions that can arise in extensions
of the Standard Model at the TeV scale. The key ingrediant needed to connect
experimental data with theoretical analysis are high-precision calculations of
matrix elements of isovector bilinear operators between the decaying neutron
and final state proton. We describe the status of our Lattice QCD program of
using valence clover fermions on dynamical N_f=2+1+1 HISQ configurations
generated by the MILC Collaboration. On the theoretical side we use the
effective field theory method and provide both model independent and dependent
analyses to obtain bounds on possible scalar and tensor interactions, both from
low energy experiments and LHC data.
