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

Authors: A. Martinez Torres, K.P. Khemchandani, Ulf-G. Meissner, E. Oset

Ref.: Eur.Phys.J.A 41, 361-368 (2009)

Abstract: We provide a series of arguments which support the idea that the peak seen in the $gamma p o K^+ Lambda$ reaction around 1920 MeV should correspond to the recently predicted state of $J^P=1/2^+$ as a bound state of $K ar{K}N$ with a mixture of $a_0(980)N$ and $f_0(980)N$ components. At the same time we propose polarization experiments in that reaction as a further test of the prediction, as well as a study of the total cross section for $gamma p o K^+ K^- p$ at energies close to threshold and of $d sigma/d M_{inv}$ for invariant masses close to the two kaon threshold.

DOI: 10.1140/epja/i2009-10834-2