Are narrow unflavoured mesons a signature of new physics?

Abstract

New data of narrow low mass unflavoured mesonic structures are presented. A table of these exotic masses is obtained adding previously published data. The mass sequence shows a significant coupling of some of these clusters with stable hadrons: pion, nucleon, and deuteron. Indeed this coupling allows to reproduce rather well the masses of exotic narrow baryons and dibaryons. A discussion is presented to suggest a possible interpretation of these exotic hadronic structures.

arXiv comment20 pages 12 figures, Proceedings of the XXII International Baldin Seminar on High Energy Physics Problems, 15-20 September 2014, Dubna, Russia

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