Exotic low mass narrow baryons extracted from charge exchange reactions

Details Exotic low mass narrow baryons extracted from charge exchange reactions Exotic low mass narrow baryons extracted from charge exchange reactions

2010-02-12

arxiv.org/abs/1002.2543v1

Physics

Nuclear Physics

Nuclear Experiment

21 pages, 27 figures

Scientific paper

This paper aims to give further evidence for the existence of low mass exotic baryons. Narrow structures in baryonic missing mass or baryonic invariant mass were observed during the last twelve years. Since their evidence is still under debate, various data, measured with incident hadrons, by different collaborations, are reanalyzed to bring evidence on these narrow exotic baryonic resonances excited in charge-exchange reactions. These structures are clearly exotic as there is no room for them in the $qqq$ configurations: their width is smaller than the widths of "classical" baryonic resonances, moreover some of the masses lie below the pion threshold mass.

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