Constraints on Parity-Even Time Reversal Violation in the Nucleon-Nucleon System and Its Connection to Charge Symmetry Breaking
Markus Simonius
Abstract
Parity-even time reversal violation (TRV) in the nucleon-nucleon interaction is reconsidered. The TRV ρ-exchange interaction on which recent analyses of measurements are based is necessarily also charge-symmetry breaking (CSB). Limits on its strength gρ relative to regular ρ-exchange are extracted from recent CSB experiments in neutron-proton scattering. The result gρ 6.7× 10-3 (95% CL) is considerably lower than limits inferred from direct TRV tests in nuclear processes. Properties of a1-exchange and limit imposed by the neutron EDM are briefly discussed.
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