Bonn 2020 – wissenschaftliches Programm
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HK 27.6: Vortrag
Mittwoch, 1. April 2020, 15:30–15:45, J-HS H
Spurious poles in hadronic three-particle problems — •Martin Ebert1, Hans-Werner Hammer1, 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).