eta photoproduction and N* resonances

Details eta photoproduction and N* resonances eta photoproduction and N* resonances

2007-07-26

arxiv.org/abs/0707.3854v4

J.Phys.G36:015008,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 8 figures

Scientific paper

10.1088/0954-3899/36/1/015008

We investigate the eta photoproduction using the effective Lagrangian approach at the tree level. We focus on the new nucleon resonance N*(1675), which was reported by the GRAAL, CB-ELSA and Tohoku LNS, testing its possible spin and parity states theoretically (J^P=1/2^+-,3/2^+-). In addition, we include six nucleon resonances, D_13(1520), S_11(1535), S_11(1650), D_15(1675), P_11(1710), P_13(1720) as well as the possible background contributions. We calculate various cross sections including beam asymmetries for the neutron and proton targets. We find noticeable isospin asymmetry in transition amplitudes for photon and neutron targets. This observation may indicate that the new resonance can be identified as a non-strangeness member of the baryon antidecuplet.

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