Resonance radiative decays as a tool for its parity determination

Details Resonance radiative decays as a tool for its parity determination Resonance radiative decays as a tool for its parity determination

2005-04-28

arxiv.org/abs/hep-ph/0504268v1

Phys.Lett. B633 (2006) 298-300

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages

Scientific paper

10.1016/j.physletb.2005.12.006

Radiative decays of the spin 1/2 baryonic resonances R with the decay mode R -> KN in case of small energy release are considered. Pentaquark is an example of such resonance. It is shown that in case of positive resonance parity corrections to the soft photon radiation formula are large even at low photon energies > 20 MeV and structure terms contributions may be essential, if R size > 1 fm. This effect is absent in case of negative parity. Particularly, measurements of the gamma spectrum in pentaquark radiative decays may allow us to determine its parity.

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