To a question on the η\to π^0 γγdecay width in meson-baryon chiral model

Details To a question on the η\to π^0 γγdecay width in meson-baryon chiral model To a question on the η\to π^0 γγdecay width in meson-baryon chiral model

2007-05-30

arxiv.org/abs/0705.4383v2

JETPLett.86:164-166,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 pic

Scientific paper

10.1134/S0021364007150039

It is shown in the work of one of the authors in 1979 (MKV) that the contribution to the amplitude of this decay from diagrams with one baryon loop is equal to zero and contributions from diagrams with meson loops appear very small. However, pole diagrams with intermediate vector mesons were not considered there. Here it is shown that contributions of these pole diagrams dominate. The meson-baryon chiral model used here is compared with known quark chiral models. The obtained results are in satisfactory agreement with recent experimental data.

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