Pentaquark, cusp and rescattering in single kaon photoproduction off deuterium

Details Pentaquark, cusp and rescattering in single kaon photoproduction off deuterium Pentaquark, cusp and rescattering in single kaon photoproduction off deuterium

2006-03-03

arxiv.org/abs/nucl-th/0603009v2

Phys.Rev.C75:014002,2007

Physics

Nuclear Physics

Nuclear Theory

7 pages; 7 figures Updated version after referees' review. Main changes: 1- The contribution of positive parity pentaquark has

Scientific paper

10.1103/PhysRevC.75.014002

In very well defined part of the phase space, $K N$ and $\Lambda N$ rescattering depend on on-shell elementary matrix elements and on the low momentum components of the deuteron wave function. This provides us with the unique opportunity to study details in the scattering amplitudes that may have escaped the analysis of reactions induced on a nucleon target by Kaon and Hyperon beams at low energies. When folded with a typical experimental mass resolution, a narrow state with a width of 1 MeV would contribute by no more than 10% to the $KN$ mass spectrum. On the contrary, a cusp would be easily detected near the $\Sigma$ production threshold in the $\Lambda N$ mass spectrum.

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