2014/11/17 by T. Boika, V. Kuznetsov, Boika, T. +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.1411.4375
8 pages, 1 figure
arxiv created 2014/11/17 · arxiv updated 2014/11/19
We study the implications of the flavour SU(3) symmetry for various interpretations of the neutron anomaly in the γN→ηN cross section. We show that the explanation of the neutron anomaly due to interference of known N(1535) and N(1650) resonances implies that N(1650) resonance should have a huge coupling to ϕ-meson -- at least 5 times larger than the corresponding ρ0 coupling. In terms of quark degrees of freedom this means that the well-known N(1650) resonance must be a "cryptoexotic pentaquark"-- its wave function should contain predominantly an s s component. It turns out that the "conventional" interpretation of the neutron anomaly by the interference of known resonances metamorphoses into unconventional physics picture of N(1650).