Vector mesons and electromagnetic form factor of the Λ hyperon

The measured electromagnetic form factors of Λ hyperon in the timelike region are significantly deviated from pQCD prediction. We attribute the nonvanishing cross section near threshold to be the contribution of below-threshold ϕ(2170) state, supporting its exotic structure. Above the threshold, we...

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Veröffentlicht in:	Physical review. D 2018-11, Vol.98 (9), p.094006, Article 094006
Hauptverfasser:	Cao, Xu, Dai, Jian-Ping, Xie, Ya-Ping
Format:	Artikel
Sprache:	eng
Schlagworte:	Annihilation reactions Form factors Mesons Vector mesons
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