Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 32: Structure and Dynamics of Nuclei VI
HK 32.1: Vortrag
Mittwoch, 28. Februar 2018, 14:00–14:15, HZO 70
Elastic NN-Scattering with Coupled NΔ-Channels in Chiral Effective Field Theory — •Susanne Strohmeier and Norbert Kaiser — Technische Universität München
We employ the dynamics of the coupled (NN, NΔ, ΔN, ΔΔ)-channels to study the elastic nucleon-nucleon scattering.
The potentials arising from one- and two-pion exchange are derived from chiral effective field theory at next-to-leading order.
Particular attention is paid to the subtraction of iterative contributions from the planar 2π-exchange box diagrams.
The peripheral phase shifts and mixing angles are compared with the Nijmegen partial wave analysis up to I-waves.
The short-range contact interaction in the coupled channels is constructed up to next-to-leading order (i.e. quadratic in momenta) and the associated low energy constants are determined in fits to NN-scattering data.
The constraints on the low energy constants implied by a large-Nc counting are studied furthermore.
Work supported in part by DFG and NSFC (CRC110).