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eta photoproduction and N* resonances

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arxiv 0707.3854 v4 pith:D6FNXBMN submitted 2007-07-26 hep-ph

Ki-Seok Choi , Seung-il Nam , Atsushi Hosaka , Hyun-Chul Kim This is my paper · ORCID
classification hep-ph
keywords neutronnucleonphotoproductionpossibleresonanceresonancestargetsaddition
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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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  1. Pentaquarks and Maxim V. Polyakov

    hep-ph 2024-11 conditional novelty 3.0 of 10

    A review argues that Diakonov-Petrov-Polyakov's narrow-width Theta+ pentaquark prediction remains viable, identifying N*(1685) as the antidecuplet partner and citing LEPS/DIANA data as support.

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