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Search for Low Mass Exotic mesonic structures. Part II: attempts to understand the experimental results

Abstract : Our previous paper, part I of the same study, shows the different experimental spectra used to conclude 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 work \cite{previous} was instigated by the observation, in the $\Sigma^{+}$ disintegration: $\Sigma^{+}\to$pP$^{0}$, P$^{0}\to\mu^{-}\mu^{+}$ \cite{park}, of a narrow range of dimuon masses. The authors conclude on the existence of a neutral intermediate state P$_{0}$, with a mass M=214.3 MeV $\pm$ 0.5 MeV. We present here some attempts to understand the possible nature of the structures observed in part I.
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Contributor : Suzanne Robert <>
Submitted on : Monday, October 15, 2007 - 11:35:51 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:24 PM

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B. Tatischeff, E. Tomasi-Gustafsson. Search for Low Mass Exotic mesonic structures. Part II: attempts to understand the experimental results. Physics of Particles and Nuclei Letters / PisВ'ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, MAIK Nauka/Interperiodica, 2008, 8, pp.420-422. ⟨10.1134/S1547477108050026⟩. ⟨in2p3-00179299⟩

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