Final state interactions effects on kinetic energy sum spectra in nonmesonic weak decay
AUTOR(ES)
Barbero, C., Mariano, A., Duarte, S.B.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2010-09
RESUMO
We analyze the effect of final state interactions (FSI) on coincidence spectra in nonmesonic hypernuclear weak decay, ΛN → nN, as a function of the kinetic energy sum, EnN = En+ E N, both for np and nn events. Adopting a formalism recently developed, the effects of FSI originated from the interaction between the outgoing nucleons and those in the residual core are included analytically in a very simple way within the eikonal approximation through the modification of the emerging particles momenta. Numerical results are shown for 5ΛHe and 12ΛC hypernucleus. We found that coincidence spectra are only slightly modified and the disagreement between theory and experimental data still persists, mainly for nn events in 5ΛHe where enough statistics exists. We conclude that admixtures of excitations in the final state produced by FSI need to be added to our approach in order to improve the agreement with data.
Documentos Relacionados
- Nuclear structure in nonmesonic weak decay of hypernuclei
- ON A SYMMETRY IN WEAK INTERACTIONS*
- The effects of weak extremely low frequency magnetic fields on calcium/calmodulin interactions.
- Intrinsic asymmetry parameter in nonmesonic hypernuclear decay: analytical proof of the independence on hypernucleus within an independent particle shell model
- Asymmetry parameter for the nonmesonic decay of 5LHe