Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-09-20
Eur.Phys.J.A34:161-183,2007
Physics
Nuclear Physics
Nuclear Theory
23 pages, 13 figs, EPJ A style
Scientific paper
10.1140/epja/i2007-10492-4
We present a gauge invariant approach to photoproduction of mesons on nucleons within a chiral unitary framework. The interaction kernel for meson-baryon scattering is derived from the chiral effective Lagrangian and iterated in a Bethe-Salpeter equation. Within the leading order approximation to the interaction kernel, data on kaon photoproduction from SAPHIR, CLAS and CBELSA/TAPS are analyzed in the threshold region. The importance of gauge invariance and the precision of various approximations in the interaction kernel utilized in earlier works are discussed.
Borasoy Bugra
Bruns Peter C.
Meißner Ulf-G.
Nißler R.
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