Eta-Eta' mixing and the derivative of the topological susceptibility at zero momentum transfer

Eta-Eta' mixing and the derivative of the topological susceptibility at zero momentum transfer

The couplings of the isosinglet axial-vector currents to the Eta and Eta' mesons are evaluated in a stable, model independent way by use of polynomial kernels in dispersion integrals. The corrections to the Gell-Mann-Oakes-Renner relation in the isoscalar channel are deduced. The derivative of...

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Bibliographic Details
Main Author: Nasrallah, N. F
Format: Journal Article
Language:English
Published: 16-11-2017
Subjects:
Physics - High Energy Physics - Phenomenology
Online Access:Get full text
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Summary:The couplings of the isosinglet axial-vector currents to the Eta and Eta' mesons are evaluated in a stable, model independent way by use of polynomial kernels in dispersion integrals. The corrections to the Gell-Mann-Oakes-Renner relation in the isoscalar channel are deduced. The derivative of the topological susceptibility at the origin is calculated taking into account instantons and instanton screening.
DOI:10.48550/arxiv.1609.04369