Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei IV
HK 18.5: Vortrag
Montag, 28. März 2022, 17:15–17:30, HK-H7
Three-body resonances in pionless effective field theory — •Sebastian Dietz1, Hans-Werner Hammer1,2, Sebastian König3,1, and Achim Schwenk1,2,4 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI and Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Darmstadt — 3Department of Physics, North Carolina State University, Raleigh — 4Max-Planck-Institut für Kernphysik, Heidelberg
We investigate the appearance of resonances in three-body systems using pionless effective field theory at leading order. The Faddeev equation is analytically continued to the unphysical sheet adjacent to the positive real energy axis using a contour rotation. We consider both the three-boson system and the three-neutron system. For the former, we calculate the trajectory of Borromean three-body Efimov states turning into resonances as they cross the three-body threshold. For the latter, we find no sign of three-body resonances or virtual states at leading order.
* This work was supported in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Projektnummer 279384907 - SFB 1245 and by the National Science Foundation under Grant No. PHY-2044632. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under the FRIB Theory Alliance award DE-SC0013617. Computational resources have been provided by the Jülich Supercomputing Center.