Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-08-08
AIP Conference Proceedings 1388, 246 (2011)
Physics
Nuclear Physics
Nuclear Theory
Contribution to the Proceedings of BARYONS'10 - International conference on the structure of baryons, Dec. 7-11, 2010, Osaka,
Scientific paper
We study whether the nonmonotonic behavior found in the differential cross section of the phi-meson photoproduction near threshold can be described by a resonance. The resonant contribution is evaluated by using an effective Lagrangian approach. We find that, with the assumption of a J^P=3/2^- resonance with mass of 2.10 \pm 0.03 GeV and width of 0.465 \pm 0.141 GeV, LEPS data can indeed be well described. The ratio of the helicity amplitudes A_1/2/A_3/2 calculated from the resulting coupling constants differs in sign from that of the known D13(2080). We further find that the addition of this postulated resonance can substantially improve the agreement between the existing theoretical predictions and the recent omega photoproduction data if a large value of the OZI evading parameter x_OZI = 12 is assumed for the resonance.
Kiswandhi Alvin
Xie Ju-Jun
Yang Shin Nan
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