Some more remarks on the Witten-Veneziano formula for the $\eta'$ mass

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Erhard Seiler This is my paper · ORCID

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keywords formulasomewitten-venezianoattemptsbasisconnectiondiscussfirm

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We discuss some subtleties in connection with the new attempts to provide a firm basis for ths Witten-Veneziano formula.

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On cusps in the $\eta'$ potential
hep-th 2025-08 conditional novelty 7.0 of 10

The eta-prime potential must have at least gcd(N,N_f) cusped branches when gcd(N,N_f)>1, and s-confinement is only possible when gcd(N,N_f)=1.