Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Hadron Structure and Spectroscopy II

HK 11.5: Talk

Tuesday, March 28, 2017, 12:00–12:15, F 5

Cascading nucleon resonance decays * — •Mariana Nanova for the CBELSA/TAPS collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen

A key step towards understanding non-perturbative QCD is baryon spectroscopy, the investigation of the spectrum and properties of baryon resonances [1]. We studied the two-meson photoproduction with the CB/TAPS detector system at the ELSA accelerator in Bonn in the reactions γp→ pπ⁰π⁰ and γp→ pπ⁰η. High statistics have been obtained in irradiating a liquid hydrogen target with photon beams in the incident energy range from 0.5 to 3.0 GeV. A kinematic fit has been used in the reconstruction and identification of the exit channels. Dalitz plots show a clear evidence for the Δ(1232), and further baryon resonances populated in the decay of higher lying nucleon resonances [2,3,4]. Preliminary results on Δ(1232)π⁰ and Δ(1232)η excitation functions will be presented.
E. Klempt and J.-M. Richard, Rev. Mod. Phys. 82 (2010) 1095
E. Gutz et al., Eur. Phys. J. A 50 (2014) 74
V. Sokhoyan et al., Eur. Phys. J. A 51 (2015) 95
A. Thiel et al., Phys. Rev. Lett. 114 (2015) 091803
^∗Supported by DFG through SFB/TR16.