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The expressions for the transition form factors (TFFs) of pseudoscalar mesons are derived in the context of the anomaly sum rule approach based on the dispersion representation of the axial… Click to show full abstract
The expressions for the transition form factors (TFFs) of pseudoscalar mesons are derived in the context of the anomaly sum rule approach based on the dispersion representation of the axial anomaly and hypothesis of the global quark-hadron duality. The obtained solutions take into account the π$^{0}$-η-η′ mixing and the contribution of the gluon anomaly. It is shown that this method allows one to describe the TFFs for spacelike and timelike photon virtualities. The contribution of the gluon anomaly is estimated.
Keywords:
form factors;
contribution gluon;
pseudoscalar mesons;
transition form;
gluon anomaly
Journal Title: Physics of Atomic Nuclei
Year Published: 2019
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Journal Title: Physics of Atomic Nuclei
Year Published: 2019
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!