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Phys. Rev. Lett. 33, 108–111 (1974)

ΔI=1/2 Rule for Nonleptonic Decays in Asymptotically Free Field Theories

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M. K. Gaillard* and Benjamin W. Lee†
National Accelerator Laboratory, Batavia, Illinois 60510

Received 10 April 1974; published in the issue dated 8 July 1974

The effective nonleptonic weak interaction is examined assuming the Weinberg-Salam theory of weak interactions and an exactly-conserved-color gauge symmetry for strong interactions. It is shown that the octet part of the nonleptonic weak interaction is more singular at short distances than the 27 part. The resulting enhancement of the octet term in the effective local weak Lagrangian, together with suggested mechanisms for the suppression of matrix elements of the 27 operator, may be sufficient to account for the observed |ΔI|=1/2 rule.

© 1974 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.33.108
DOI:
10.1103/PhysRevLett.33.108
PACS:

*On leave of absence from Laboratoire de Physique Theorique et Particules Elementaires, Orsay (Laboratoire associe au Centre National de la Recherche Scientifique).

†On leave of absence from the Institute of Theoretical Physics, State University of New York, Stony Brook, N.Y. 11790.

 
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