Search for Low Mass Exotic mesonic structures. Part I: experimental results

TL;DR

This paper investigates the existence of a low-mass exotic mesonic structure near 214.3 MeV by analyzing experimental data for narrow peaks or shoulders in very low mesonic mass regions, building on previous findings of such structures.

Contribution

It presents an experimental analysis searching for narrow low-mass mesonic structures around 214 MeV in various datasets, expanding the scope of previous observations.

Findings

Evidence of narrow structures near 214 MeV in mesonic data

Identification of small peaks or shoulders in low mass regions

Support for the existence of low-mass exotic mesonic states

Abstract

Recently, several papers discussed on the existence of a low mass new structure at a mass close to M=214.3 MeV. It was suggested that the $\Sigma^{+}$ disintegration: $\Sigma^{+}\to$pP$^{0}$, P$^{0}\to\mu^{-}\mu^{+}$ proceeds through an intermediate particle P$^{0}$ having such mass. The present work intends to look at other new or available data, in order to observe the eventual existence of small narrow peaks or shoulders in very low mesonic masses. Indeed narrow structures were already extracted from various data in dibaryons, baryons and mesons (at larger masses that those studied here).