Publications [#248422] of Roxanne P. Springer

Papers Published
  1. Savage, MJ; Springer, RP, Kaon-nucleon couplings for weak decays of hypernuclei, Physical Review C - Nuclear Physics, vol. 53 no. 1 (1996), pp. 441-447 [doi] .

    We investigate the weak kaon-nucleon (NNK) S-wave and P-wave interactions using heavy baryon chiral perturbation theory. The leading one-loop SU(3) breaking contributions to the ppK, pnK, and nnK couplings are computed. We find that they suppress all NNK amplitudes by 30% to 50%. The ratio of neutron-induced to proton-induced hypernuclear decay widths is sensitive to such reductions. It has been argued that the discrepancy between the predicted and observed P-wave amplitudes in Δs = 1 hyperon decay results from an accidental cancellation between tree-level amplitudes, and is not a fundamental problem for chiral perturbation theory. Agreement between experimentally determined NNK P-wave amplitudes and our estimates would support this explanation.