Theories of Low Energy Nuclear Transmutations
  Employing concrete examples from nuclear physics it is shown that low energy nuclear reactions can and have been induced by all of the four fundamental interactions (i) (stellar) gravitational, (ii) strong, (iii) electromagnetic and (iv) weak. Differences are highlighted through the great diversity in the rates and similarity through the nature of the nuclear reactions initiated by each. 
Y.N. Srivastava, A. Widom, J. Swain
physics.gen-ph nucl-th