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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Hadronenstruktur und -spektroskopie

HK 19.3: Vortrag

Montag, 4. März 2013, 17:30–17:45, HSZ-105

Chiral effective field theory for hyperon-nucleon interactions — •Stefan Petschauer¹, Johann Haidenbauer², Norbert Kaiser¹, Ulf-G. Meißner², and Wolfram Weise¹ — ¹Physik-Department, Technische Universität München, D-85747 Garching, Germany — ²Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany

We calculate hyperon-nucleon interactions within the framework of chiral effective field theory. The irreducible potentials in momentum space are derived from the chiral SU(3) Lagrangian and include contributions from one- and two-meson exchange as well as contact terms up to next-to-leading order. Effects from intermediate decuplet baryons are considered as well. With these chiral baryon-baryon potentials a systematic study of hyperon-nucleon scattering and light hypernuclei is possible. Calculations for hyperon-nucleon cross sections have been performed using a regularized Lippmann-Schwinger equation and a good description of all the available data is achieved.

Work supported in part by DFG and NSFC (CRC110).