Portal de Periódicos da CAPES

An analysis of parity violating nuclear effects at low energy

1978; Elsevier BV; Volume: 300; Issue: 2 Linguagem: Inglês

10.1016/0375-9474(78)96134-1

1873-1554

B. Desplanques, J. Missimer,

Quantum Chromodynamics and Particle Interactions

We present an analysis of parity violating nuclear effects at low energy which attempts to circumvent the uncertainties due to the weak and strong nucleon-nucleon interactions at short distances. Extending Danilov's parametrization of the parity violating nucleon-nucleon scattering amplitude, we introduce six parameters: one for the long range contribution due to the pion exchange and five for the shorter range contributions. This choice gives an accurate representation of parity violating effects in the nucleon-nucleon system up to a lab energy of 75 MeV. For calculations in nuclei, we derive an effective two-body potential in terms of the parameters. The analysis of presently measured effects shows that they are consistent, and, in particular, that the circular polarization of photons in n + p → d + γ is not incompatible with the other measurements. It does not imply a dominant isotensor component.