Original scientific paper
Parity-violating nucleon-pion amplitude in gauge-invariant models of weak, electromagnetic and strong interactions
H. Galić
; Institute "Ruđer Bošković" and University of Zagreb, Zagreb
D. Tadić
; Institute "Ruđer Bošković" and University of Zagreb, Zagreb
Abstract
Nonleptonic effective weak Hamiltonians have been found for unified gauge theories, including asymptotically free strong gluon interactions. Two¬-quark operators appearing in the short-distance expansion are discussed in detail. Effective Hamiltonians serve as a basis for the deduction of the parity-violating nucleon-nucleon-pion amplitude. Problems connected with this deduction are described and various approximations are compared, including the possibility of the existence of a Zweig-Iizuki rule analogon. There are some indications that certain models predict a parity-violating nucleon-nucleon-pion amplitude which is smaller than 10-7 (h = c = 1), thus providing a basis for experimental discrimination.
Keywords
Hrčak ID:
328157
URI
Publication date:
2.8.1976.
Visits: 562 *