Journal or Book Title
PHYSICAL REVIEW C
We compute the photon asymmetry Bγ for near threshold parity-violating (PV) pion photoproduction through subleading order. We show that subleading contributions involve a new combination of PV couplings not included in previous analyses of hadronic PV. We argue that existing constraints on the leading order contribution to Bγ—obtained from the PV γ-decay of 18F—suggest that the impact of the subleading contributions may be more significant than expected from naturalness arguments.
Zhu, SL; Puglia, S; Holstein, BR; and Ramsey-Musolf, MJ, "Subleading corrections to parity-violating pion photoproduction" (2001). Physics Department Faculty Publication Series. 306.