Lambda(1520,3/2^-) photoproduction reaction via gamma N -> K Lambda(1520)

Details Lambda(1520,3/2^-) photoproduction reaction via gamma N -> K Lambda(1520) Lambda(1520,3/2^-) photoproduction reaction via gamma N -> K Lambda(1520)

2005-03-16

arxiv.org/abs/hep-ph/0503149v2

Phys.Rev.D71:114012,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 31 figures

Scientific paper

10.1103/PhysRevD.71.114012

We investigate Lambda(1520,3/2^-,D_03) photoproduction via the gamma N -> K Lambda^* reaction process. Using effective Lagrangians, we compute the total and differential cross sections as well as the dependence on the momentum transfer for the photoproduction at the tree-level. We employ two different form factors: The four-dimensional gauge-invariant type and the three dimensional one depending on the external momenta. We find that the total cross sections for the proton target are well reproduced as compared with the experimental data. It turns out that the total cross sections for the neutron target are significantly smaller than those for the proton target. We also compare the present results with the gamma N -> bar{K} Theta^+ reaction in order to extract information of Theta^+. Finally the role of K^*--exchange in the production reaction is discussed.

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