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.

3 pages, 4 figures. Follows 0710.1796. Both replace arXiv:0707.1261 [nucl-ex]

References in corpus (6)

• Light spin-1/2 or spin-0 Dark Matter particles
• Evidence for the Decay Sigma+ -> p mu+ mu-
• Detecting MeV Gauge Bosons With High-Energy Neutrino Telescopes
• Search for Low Mass Exotic mesonic structures. Part I: experimental results
• πN and ηp deexcitation channels of the N^* and Δbaryonic resonances between 1470 and 1680 MeV
• Hadronic Spectra and Kaluza-Klein Picture of the World

Cited by in corpus (2)

• Investigating electron interacting dark matter
• Liquid Noble gases for Dark Matter searches: a synoptic survey