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arXiv · 0803.0809

Radiative decay into $γP$ of the low lying axial-vector mesons

H. Nagahiro·L. Roca·E. Oset
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Abstract

We evaluate the radiative decay into a pseudoscalar meson and a photon of the whole set of the axial-vector mesons dynamically generated from the vector-pseudoscalar meson ($VP$) interaction. We take into account tree level and loop diagrams coming from the axial-vector decay into a vector and a pseudoscalar meson. We find a large span for the values of the radiative widths of the different axial-vector mesons. In particular, we evaluate the radiative decay into $K γ$ of the two $K_1(1270)$ states, recently claimed theoretically, and discuss the experimental values quoted so far on the assumption of only one state.

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H. Nagahiro, L. Roca, E. Oset. 2008-03-06. Radiative decay into $γP$ of the low lying axial-vector mesons. https://doi.org/10.1103/physrevd.77.034017

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