$η_c$ - glueball Mixing and Resonance X(1835)

$η_c$ mixing effects on charmonium and $B$ meson decays

$η_c$ production and dimuon enhancement in heavy ion collisions

$ηγZ$ anomaly from the $η-->γμ+μ-$ decay

$θ$ Bag and Quark Confinement

$θ$ Effects in Chern-Simons ${\rm QED}_{2+1}$ with a Four-Fermi Interaction

$Θ$ vacua states in heavy ion collisions in presence of dissipation and noise

$θ$ Vacuum in a Random Matrix Model

$θ$ Vacuum: A Matrix Model

$θ$-dependence of QCD at Finite Isospin Density

$Θ+$: Another Explanation and Prediction

$θ-$ Parameter in 2 Color QCD at Finite Baryon and Isospin Density

$Θ^+$ baryon, $N^* (1685)$ resonance, and $πN$ sigma term in the context of the LEPS and DIANA experiments

$Θ^+$ Hypernuclei

$Θ^+$ in a chiral constituent quark model and its interpolating fields

$Θ^+$ pentaquark in the nuclear medium

$Θ^+$-pentaquark parity from associative baryon production in $π D$ collisions, $π^{\pm}+D\to Θ^+ +Σ^{\pm}$

$Θ^{+}$ hypernuclei in relativistic mean field model

$θ_{13}$ in Neutrino Mass Matrix with the Minimal Texture

$θ_{13}$, $δ$ and the neutrino mass hierarchy at a $γ=350$ double baseline Li/B $β$-Beam