Abstract
Our previous paper, part I of the same study, shows the different experimental spectra used to draw a conclusion on the genuine existence of narrow, weakly excited mesonic structures having masses below and a little above the pion (M = 139.56 MeV) mass. This study [1] was instigated by the observation, in the Σ+ disintegration—Σ+ → pP 0, P 0 → μ−μ+ [2]—of a narrow range of dimuon masses. The authors make a conclusion on the existence of a neutral intermediate state P 0 with a mass M = (214.3 ± 0.5) MeV. We present here some attempts to understand the possible nature of the structures observed in part I.
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Tatischeff, B., Tomasi-Gustafsson, E. Search for low-mass exotic mesonic structures: II. Attempts to understand the results. Phys. Part. Nuclei Lett. 5, 420–422 (2008). https://doi.org/10.1134/S1547477108050026
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DOI: https://doi.org/10.1134/S1547477108050026