Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8193767 | Physics Letters B | 2010 | 7 Pages |
Abstract
The ÏâÏÏÏÎ½Ï decay is driven by the hadronization of the axial-vector current. Within the resonance chiral theory, and considering the large-NC expansion, this process has been studied in Ref. [1] (D. Gómez Dumm, A. Pich, J. Portolés, 2004). In the light of later developments we revise here this previous work by including a new off-shell width for the lightest a1 resonance that provides a good description of the ÏâÏÏÏÎ½Ï spectrum and branching ratio. We also consider the role of the Ï(1450) resonance in these observables. Thus we bring in an overall description of the ÏâÏÏÏÎ½Ï process in excellent agreement with our present experimental knowledge.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
D. Gómez Dumm, P. Roig, A. Pich, J. Portolés,