$ε_b$ Constraints on the Minimal $SU(5)$ and $SU(5)\times U(1)$ Supergravity Models

$ζ$-function calculation of the Weyl determinant for two-dimensional non-abelian gauge theories in a curved background and its W-Z-W terms

$ζ$-phenomenology

$ζ$-regularised spectral determinants on metric graphs

$ζ(5)$ is irrational

$ζ-$function and heat kernel formulae

$η$ and $η'$ decays and what can we learn from them?

$η$ and $η'$ mesons in the Dyson-Schwinger approach at finite temperature

$η$ and $η'$ mesons in the Dyson-Schwinger approach using a generalization of the Witten-Veneziano relation

$η$ and $η^\prime$ Physics at BES-III

$η$ bound states in nuclei

$η$ Meson Physics at Gem

$η$ meson reconstruction in pp reactions at 2.2 GeV with HADES

$η$ photoproduction on the quasi-free nucleons in the chiral quark model

$η$ Production in Peripheral Heavy-Ion Collisions

$η$ production off the proton in a Regge-plus-chiral quark approach

$η$-Deuteron Scattering

$η$-invariant and flat vector bundles

$η$-Meson Decays and Strong $U_A(1)$ Breaking in the Three-Flavor Nambu-Jona-Lasinio Model

$η$-meson in nuclear matter