Mixing and decay constants of pseudoscalar mesons: Octet-singlet vs. quark flavor basis
✍ Scribed by Thorsten Feldmann
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 418 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0920-5632
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✦ Synopsis
Although 9-v' mixing is qualitatively well understood as a consequence of the IT( anomaly in QCD together with a broken SU(3)p flavor symmetry, until recently the values of decay and mixing parameters of the q and q' were only approximately known, e.g. values for the octet-singlet mixing angle between -20" and -10" could be found in the literature. New experimental data, especially for the reactions +yr* + 9,~' and B + $K, together with new theoretical results from higher order corrections in chiial perturbation theory stimulated a phenomenological re-analysis of thii subject, which led to a coherent qualitative and quantitative picture of I] -q' &b&g and even of q -vi -vC m%ng.