Model-independent approach to eta -> pi+ pi- gamma and eta' -> pi+ pi- gamma

Autor:	Stollenwerk, F., Hanhart, C., Kupsc, A., Meißner, U. -G., Wirzba, A.
Rok vydání:	2011
Předmět:	Nuclear Theory High Energy Physics - Phenomenology
Zdroj:	Phys.Lett.B707:184-190,2012
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physletb.2011.12.008
Popis:	We present a new, model-independent method to analyze radiative decays of mesons to a vector, isovector pair of pions of invariant mass square below the first significant pion-pion threshold in the vector channel. It is based on a combination of chiral perturbation theory and dispersion theory. This allows for a controlled inclusion of resonance physics without the necessity to involve vector meson dominance explicitly. As an example, the method is applied to an analysis of the reactions eta -> pi+ pi- gamma and eta'->pi+ pi- gamma. Comment: 16 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1108.2419 Zobrazit plný text záznamu View this record from Arxiv