Two parity violating asymmetries from $n p \to d \gamma$ in pionless effective field theories

Abstract

We consider parity-violating observables from the processes $\vec n p\to d \gamma$ and $np \to d \overset {\circlearrowleft}{\gamma}$. We perform calculations using pionless effective field theory both with and without explicit dibaryon fields. After combining these results with ones we have already obtained on parity-violating asymmetries in $\vec NN$ scattering, experimental input would in principle allow the extraction of all five parameters occurring at leading order in the parity-violating Lagrangian.Comment: 12 pages, 4 figure