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Título : QCD-duality approach to non-leptonic weak transitions : towards an understanding of the |DELTA.I| = 1/2 rule
Autor : Pich, Antonio
Fecha de publicación : Apr-1989
Editor: Elsevier
Citación : Nuclear Physics B Proceedings Supplements 7(1): 194-212 (1989)
Resumen: 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.
Descripción : 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.
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ISSN: 0920-5632
DOI: 10.1016/0920-5632(89)90569-0
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