Study of parity violating observables in few-nucleon systems

Parity violation in few-nucleon systems is studied using a nucleon-nucleon parity-violating (PV) potential derived within an effective field theory framework at next-to-next-to-leading order. The potential includes one- and two-pion exchanges, contact interactions and relativistic corrections and depends on six low-energy constants: the pion-nucleon coupling constant h ¹_π and five parameters multiplying the independent contact interaction terms (with one four-gradient). This potential is used to study the p̄-p longitudinal asymmetry, the neutron spin rotation in n̄-d scattering, and the longitudinal asymmetry in the ³He(n̄,p)³H reaction.