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- W2950606918 abstract "We study the $eta$-$eta'$ mixing up to next-to-next-to-leading-order in $U(3)$ chiral perturbation theory in the light of recent lattice simulations and phenomenological inputs. A general treatment for the $eta$-$eta'$ mixing at higher orders, with the higher-derivative, kinematic and mass mixing terms, is addressed. The connections between the four mixing parameters in the two-mixing-angle scheme and the low energy constants in the $U(3)$ chiral effective theory are provided both for the singlet-octet and the quark-flavor bases. The axial-vector decay constants of pion and kaon are studied in the same order and confronted with the lattice simulation data as well. The quark-mass dependences of $m_eta$, $m_{eta'}$ and $m_K$ are found to be well described at next-to-leading order. Nonetheless, in order to simultaneously describe the lattice data and phenomenological determinations for the properties of light pseudoscalars $pi, K, eta$ and $eta'$, the next-to-next-to-leading order study is essential. Furthermore, the lattice and phenomenological inputs are well reproduced for reasonable values of low the energy constants, compatible with previous bibliography." @default.
- W2950606918 created "2019-06-27" @default.
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- W2950606918 date "2015-03-08" @default.
- W2950606918 modified "2023-10-18" @default.
- W2950606918 title "Scrutinizing the eta-eta' mixing, masses and pseudoscalar decay constants in the framework of U(3) chiral effective field theory" @default.
- W2950606918 doi "https://doi.org/10.48550/arxiv.1503.02248" @default.
- W2950606918 hasPublicationYear "2015" @default.
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