Please use this identifier to cite or link to this item:
http://hdl.handle.net/10261/33114
Share/Export:
![]() ![]() |
|
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Title: | Isospin Breaking in K -> Pi Pi Decays |
Authors: | Cirigliano, Vincenzo; Ecker, Gerhard; Neufeld, Helmut; Pich, Antonio CSIC ORCID | Issue Date: | 2004 | Publisher: | Springer | Citation: | European Physical Journal C - Particles and Fields 33(3): 369-396 (2004) | Abstract: | We perform a complete analysis of isospin breaking in K -> Pi Pi amplitudes in chiral perturbation theory, including both strong isospin violation and electromagnetic corrections to next-to-leading order in the low-energy expansion. The unknown chiral couplings are estimated at leading order in the 1/N_c expansion. We study the impact of isospin breaking on CP conserving amplitudes and rescattering phases. In particular, we extract the effective couplings g_8 and g_27 from a fit to K -> Pi Pi branching ratios, finding small deviations from the isospin-limit case. The ratio Re(A_0)/Re(A_2) measuring the Delta I=1/2 enhancement is found to decrese from 22.1 +/- 0.1 in the isospin limit to 20.3 +/- 0.5 in the presence of isospin breaking. We also analyse the effect of isospin violation on the CP violation parameter epsilon-prime, finding a destructive interference between three different sources of isospin violation. Within the uncertainties of large-N_c estimates for the low-energy constants, the isospin violating correction for epsilon-prime is below 15%. | Description: | 28 páginas, 3 figuras, 4 tablas.-- arXiv:hep-ph/0310351v2 | Publisher version (URL): | http://dx.doi.org/10.1140/epjc/s2003-01579-3 | URI: | http://hdl.handle.net/10261/33114 | DOI: | 10.1140/epjc/s2003-01579-3 | ISSN: | 1434-6044 |
Appears in Collections: | (IFIC) Artículos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
0310351v2.pdf | 525,61 kB | Adobe PDF | ![]() View/Open |
Review this work
SCOPUSTM
Citations
85
checked on Jul 5, 2022
WEB OF SCIENCETM
Citations
66
checked on Jul 1, 2022
Page view(s)
294
checked on Jul 6, 2022
Download(s)
157
checked on Jul 6, 2022
Google ScholarTM
Check
Altmetric
Dimensions
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.