期刊
EUROPEAN PHYSICAL JOURNAL A
卷 34, 期 2, 页码 161-183出版社
SPRINGER
DOI: 10.1140/epja/i2007-10492-4
关键词
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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.
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