Isospin violation in epsilon'

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Jan 2003Embargo end date: 01 Jan 2003 Spain Publisher:American Physical Society (APS)Journal:Physical review letters, volume 91 (issn: 0031-9007,

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Authors: Cirigliano, Vincenzo; Ecker, Gerhard; Neufeld, Helmut; Pich Zardoya, Antonio;

doi: 10.48550/arxiv.hep-ph/0307030

pmid: 14611393

arXiv: hep-ph/0307030

handle: 10550/42476 , 10261/33123

Isospin violation in epsilon'

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Abstract

On the basis of a next-to-leading-order calculation in chiral perturbation theory, the first complete analysis of isospin breaking for direct CP violation in K0→2π decays is performed. We find a destructive interference between three different sources of isospin violation in the CP violation parameter epsilon'. Within the uncertainties of large-Nc estimates for the low-energy constants, the isospin violating correction for epsilon' is below 15%.

The work of V. C. and A. P. was supported in part by MCYT, Spain (Grant No. FPA-2001-3031) and by ERDF funds from the European Commission. This work was supported in part by HPRN-CT2002-00311 (EURIDICE) and by Acciones Integradas, Project No. 19/2003 (Austria), HU2002-0044 (MCYT, Spain).

4 páginas, 1 tabla.-- PACS numbers: 12.39.Fe, 11.30.Er, 13.25.Es

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Country

Spain

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Keywords

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Física, FOS: Physical sciences

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