On tests of time reversal invariance in nucleon nucleon scattering

Abstract
The nucleon-nucleon scattering formalism is developed assuming Lorentz invariance and parity conservation but allowing for a violation of time reversal invariance. The pp scattering matrix involves six amplitudes (one, g(E, 0) violates TRI) the np matrix eight (g(E, 0) violates TRI, h(E, 0) violates TRI and isospin invariance, f(E, θ) violates isospin invariance). A preliminary analysis of the experimental status of TRI in pp scattering is performed and the results are surprisingly inconclusive