Parity violation in proton-proton scattering from chiral effective field theory

Understand

We present a calculation of the parity-violating longitudinal asymmetry in proton-proton scattering.

• The calculation is performed in the framework of chiral effective field theory which is applied systematically to both the parity-conserving and parity-violating interactions.
• The asymmetry is calculated up to next-to-leading order in the parity-odd nucleon-nucleon potential.
• At this order the asymmetry depends on two parity-violating low-energy constants: the weak pion-nucleon coupling constant $h_\pi$ and one four-nucleon contact coupling.