LOW-ENERGY SUM-RULES AND LARGE-N-C CONSISTENCY CONDITIONS

Authors
Citation
W. Broniowski, LOW-ENERGY SUM-RULES AND LARGE-N-C CONSISTENCY CONDITIONS, Nuclear physics. A, 580(3), 1994, pp. 429-444
Citations number
44
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
03759474
Volume
580
Issue
3
Year of publication
1994
Pages
429 - 444
Database
ISI
SICI code
0375-9474(1994)580:3<429:LSALCC>2.0.ZU;2-B
Abstract
The large-N-c consistency conditions for axial-vector and isovector ma gnetic couplings of pions to baryons are discussed from the point of v iew of low-energy current-algebra sum rules (Adler-Weisberger, Cabibbo -Radicati). Tn particular, we show how the result that ratios of axial -vector and isovector magnetic coupling constants get corrections only at the order 1/N-c(2) follows from the N-c-counting of appropriate cr oss sections. This counting is performed using various approaches at t he quark and hadronic level. Other implications of our method are also presented.