Field Theory of Deuteron Exchange Currents
Abstract
The influence of pion exchange currents on the thermal capture process (n+p>d+γ) is investigated fieldtheoretically. The Chew model is used for the pionnucleon interaction, and perturbation and corresponding renormalization techniques are developed for treating a system containing two dynamic nucleons. The Fockspace state vector is related to the twonucleon wave function, and the cross section is then calculated to order ef^{2}. The observed cross section is known to be somewhat larger than that predicted neglecting explicit meson effects, and it is found here that the contribution of the exchange currents is too small and of the wrong sign to account for the discrepancy.
 Publication:

Physical Review
 Pub Date:
 July 1958
 DOI:
 10.1103/PhysRev.111.346
 Bibcode:
 1958PhRv..111..346F