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POLE STRUCTURE OF THE A(1405) REGION
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作者 Ulf-G. MeiBner Tetsuo Hyodo 《Chinese Physics C》 SCIE CAS CSCD 2016年第10期815-816,共2页
The A(1405) resonance emerges in the meson-baryon scattering amplitude with the strangeness S = - 1 and isospin I = 0. It is the archetype of what is called a dynamically generated resonance, as pioneered by Dalitz ... The A(1405) resonance emerges in the meson-baryon scattering amplitude with the strangeness S = - 1 and isospin I = 0. It is the archetype of what is called a dynamically generated resonance, as pioneered by Dalitz and Tuan [1]. The most powerful and systematic approach for the low-energy regime of the strong interactions is chiral perturbation theory (ChPT), see e.g. Ref. 2. A perturbative calculation is, however, not applicable to this sector because of the existence of the A(1405) just below the KN threshold. In this case, ChPT has to be combined with a non-perturbative resummation technique, just as in the case of the nuclear forces. By solving the Lippmann- Schwinger equation with the interaction kernel determined by ChPT and using a particular regularization, in Ref. 3 a successful description of the low-energy K-p scattering data as well as the mass distribution of the A(1405) was achieved (for further developments, see Ref. 4 and references therein). 展开更多
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