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A Theoretical determination of the eta - eta-prime mixing

Degrande, Céline;Gérard, Jean-Marc

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Abstract
The systematic large N_c limit within chiral perturbation provides an optimal eta-eta' mixing angle of about -27 degrees at leading order in p^2. In this frame, agreement with the data can be reached with higher order corrections of about 20%. Comment: 12 pages, 2 figures; reference to the two-mixing-angle scheme added, minor corrections; to appear in JHEP
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A Theoretical determination of the eta - eta-prime mixing. (n.d.). https://hdl.handle.net/2078.5/212320