Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Structure and Dynamics of Nuclei VI

HK 27.6: Talk

Wednesday, April 1, 2020, 15:30–15:45, J-HS H

Spurious poles in hadronic three-particle problems — •Martin Ebert¹, Hans-Werner Hammer^{1, 2}, and Akaki Rusetsky³ — ¹IKP, TU Darmstadt — ²EMMI, GSI Darmstadt — ³HISKP and BCTP, Universität Bonn

The particle-dimer picture is a useful tool to simplify the three-particle problem by including information about the two-particle system. However, in higher orders the dimer propagator can exhibit spurious poles. We present a non-perturbative approach to deal with this problem and compare to fully perturbative schemes. The method is tested with a Yamaguchi model potential.

* Funded in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through CRC 1245 and CRC 110, HGS-HIRe, Volkswagenstiftung and Shota Rustaveli National Science Foundation (SRNSF).