Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Hadron Structure and Spectroscopy 8
HK 38.4: Talk
Tuesday, March 24, 2015, 18:15–18:30, T/SR25
η-η′ Mixing in Large-Nc Chiral Perturbation Theory — •Patricia Bickert, Pere Masjuan, and Stefan Scherer — Institut für Kernphysik, JGU, Mainz
We present a calculation of the η-η′ mixing in the framework of large-Nc chiral perturbation theory. The results are obtained at next-to-next-to-leading order (NNLO) in a combined expansion in 1/Nc, quark masses, and momenta. The numerical evaluation of masses and mixing angles is successively performed at leading order, NLO, and NNLO. We investigate the influence of unknown low-energy coupling constants on these quantities.