POLE STRUCTURE OF THE A(1405) REGION

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2016,（10）
• 页码范围: 815-816
• 页数: 2页
• 语种: 中文

摘要

The ∧(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 ∧(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 LippmannSchwinger 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 ∧(1405) was achieved (for further developments,see Ref.4 and references therein).