Searching for signatures around 1920 MeV of a N~* state of three hadron nature

摘要

We provide a series of arguments which support the idea that the peak seen in the γp→K~+Aeaction around 1920 MeV should correspond to the recently predicted state of J~P=1/2~+as a boundstate of KKN with a mixture of a_o(980)N and f_o(980)N components. At the same time we proposepolarization experiments in that reaction as a further test of the prediction, as well as a study of the totalcross-section for γp→K~+K~-pat energies close to threshold and of dσ/dM_(inv), for invariant masses closeto the two-kaon threshold.