$NNK$ and $\Lambda \Lambda K$ Amplitudes in Chiral Perturbation Theory

Abstract

We explore the S-wave and P-wave amplitudes for $NNK$ and $\Lambda \Lambda K$ interactions using chiral perturbation theory to $\mathcal{O}(m_s\log m_s)$. In contrast to the large corrections found in P-wave amplitudes in the nonleptonic decay of octet baryons, the $NNK$ amplitudes receive only small corrections to their tree-level values. The uncertainty in the $\Lambda \Lambda K$ amplitudes is found to be large.

Comments: 4 pages, Talk given at the International Conference on Hypernuclear and Strange Particle Physics (HYP97), Brookhaven Nat'l Lab., USA, October 13-18, 1997