Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10721874 | Physics Letters B | 2011 | 4 Pages |
Abstract
We analyze photoproduction of η mesons off the proton in a gauge-invariant chiral unitary framework. The interaction kernel for meson-baryon scattering is derived from the leading order chiral effective Lagrangian and iterated in a Bethe-Salpeter equation. The recent precise threshold data from the Crystal Ball at MAMI can be described rather well and the complex pole corresponding to the S11(1535) is extracted. An extension of the kernel is also discussed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Dino RuiÄ, Maxim Mai, Ulf-G. MeiÃner,