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arXiv · 1609.08354

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

Fang-Yong Dong·Bao-Xi Sun·Jing-Long Pang
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Abstract

The Bethe-Salpeter equation is solved in the framework of 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. According to 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 $Λ(1405)$ state is generated dynamically in the strangeness $S=-1$ and isospin $I=0$ sector.

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Fang-Yong Dong, Bao-Xi Sun, Jing-Long Pang. 2017-04-27. The Lambda(1405) state in a chiral unitary approach with off-shell corrections to dimensional regularized loop functions. https://doi.org/10.1088/1674-1137%2F41%2F7%2F074108

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