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HK: Fachverband Physik der Hadronen und Kerne
HK 1: Hadron Structure and Spectroscopy I
HK 1.7: Talk
Monday, February 26, 2018, 15:45–16:00, HZO 50
Hybrids as three-body states from a Faddeev-equation — •Christian Söhngen1, Gernot Eichmann2, Christian S. Fischer1, and Richard Williams1 — 1Justus-Liebig-Universität, Gießen, Deutschland — 2IST, Lisboa, Portugal
We report on recent progress in the description of hybrid states in the framework of Dyson-Schwinger/Faddeev equations [1]. Based on explicit solutions for the quark and gluon propagators and their interactions we formulate a three-body equation describing hybrids as bound states of non-perturbative quark, antiquark and gluon constituents. This setup builds on the analogous three-body framework for baryons [2] that has provided very satisfactory results for the octet and decuplet spectrum [3]. We discuss the hybrid's constituents and report on first results for the emergent bound state properties.
[1] G. Eichmann, H. Sanchis-Alepuz, R. Williams, R. Alkofer and C. S. Fischer, Prog. Part. Nucl. Phys. 91 (2016) 1
[2] G. Eichmann, R. Alkofer, A. Krassnigg and D. Nicmorus, Phys. Rev. Lett. 104 (2010) 201601
[3] H. Sanchis-Alepuz and C. S. Fischer, Phys. Rev. D 90 (2014) no.9, 096001