The A(1405) state in a chiral unitary approach with off-shell corrections to dimensional regularized loop functions

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2017,（7）
• 页码范围: 107-114
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1137/41/7/074108

摘要

The Bethe-Salpeter equation is solved in the framework of the unitary coupled-channel approximation by using the pseudoscalar meson-baryon octet interaction.The loop function of the intermediate meson and baryon is deduced in a dimensional regularization scheme,where the relativistic kinetic effect and off-shell corrections are taken into account.Based on the experimental data at the K-p threshold,the subtraction constants in the loop function are determined.The squared amplitude is suppressed strongly and only one A(1405) state is generated dynamically in the strangeness S=-1 and isospin I=0 sector.