Short-distance scale invariance and the structure of weak transitions

Roy, Probir (1972) Short-distance scale invariance and the structure of weak transitions Physical Review D - Particles, Fields, Gravitation and Cosmology, 5 (5). pp. 1180-1191. ISSN 1550-7998

Full text not available from this repository.

Official URL:

Related URL:


The effects of short-distance interactions between hadronic weak currents on the structure of weak transitions are investigated within Wilson's scheme of operator-product expansions and broken scale invariance. It is pointed out that a consistent understanding of these effects can be attained with the hypothesis that the dimensions of nonexotic fields are near-canonical while those of exotic fields are anomalously high. The lack of structure-dependent effects in the ΔI=½ part of ordinary nonleptonic decay, the suppression of the ΔI=3/2 part in the same, and the smallness of the K10-K20 mass difference are first explained following Wilson's arguments. The structure of higher-order semileptonic decays disobeying the ΔS=ΔQ role is then discussed. Finally, the important role played by short-distance effects in radiative nonleptonic decays of hadrons is elucidated and a mechanism for the large asymmetry parameter observed in the reaction Σ+→p+γ is obtained.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:46539
Deposited On:05 Jul 2011 06:10
Last Modified:05 Jul 2011 06:10

Repository Staff Only: item control page