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Open Access item QCD-duality approach to non-leptonic weak transitions : towards an understanding of the |DELTA.I| = 1/2 rule

Authors:Pich, Antonio
Issue Date:Apr-1989
Publisher:Elsevier
Citation:Nuclear Physics B Proceedings Supplements 7(1): 194-212 (1989)
Abstract:The progress done in the QCD-duality analysis of strangeness changing nonleptonic weak transitions is reviewed. The method combines the information provided by the effective chiral realization of QCD at long distances with its perturbative short-distance behaviour, via a duality approach. Special attention is given to the failure of the earlier leading-logarithm calculations in explaining the observed |AI| = 1/2 K -- pipi amplitude. It is shown that the next-to-leading alfas corrections to the |AI| = 1/2 correlator are enormous, and with the appropriate sign to produce the required enhancement.
Description:19 páginas, 5 figuras, 1 tabla.-- Comunicación presentada al Ringberg Workshop on Hadronic Matrix Elements and Weak Decays celebrado del 17 al 22 de Abril de 1988 en Ringberg (Alemania).-- CERN-TH-5102-88.
Publisher version (URL):http://dx.doi.org/10.1016/0920-5632(89)90569-0
URI:http://hdl.handle.net/10261/33405
ISSN:0920-5632
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