Speaker
Ting Gao
(University of Minnesota)
Description
We revisit the behavior of neutron interpolating currents under singlet chiral rotations and show that not all interpolating currents are good for calculating chirality-sensitive quantities. In particular, for the $\theta$-induced neutron EDM, we show that the $\beta=1$ and $\beta=-1$ current give physical answers that only depend on $\bar{\theta}=\theta_m+\theta_G$ after removing an overall phase, while the $\beta=0$ current, on the other hand, leads to unphysical dependence on the chiral rotation angle.
