Realistic Few-Body Physics in the $dd\to \alpha\pi^0$ Reaction
  We use realistic two- and three-nucleon interactions in a hybrid chiral-perturbation-theory calculation of the charge-symmetry-breaking reaction $dd\to\alpha\pi^0$ to show that a cross section of the experimentally measured size can be obtained using LO and NNLO pion-production operators. This result supports the validity of our power counting scheme and demonstrates the necessity of using an accurate treatment of ISI and FSI. 
A. Nogga, A. C. Fonseca, A. Gardestig, C. Hanhart, C. J. Horowitz, G.   A. Miller, J. A. Niskanen, U. van Kolck