O. Deineka

collaborators

2 papers

hep-ph2026

Coupled-channel Omnès matrix for the $D$ -wave isoscalar $π π / K K ˉ$ system and its application to $J / ψ \to π^{0} π^{0} γ, K_{S} K_{S} γ$

Igor Danilkin, Oleksandra Deineka, Emilie Passemar +1

In this work, we construct the $D$ -wave isoscalar $π π / K K ˉ$ coupled-channel Omnès matrix, formulated to satisfy unitarity, analyticity, and the appropriate asymptotic behavior.…

hep-ph2025

A dispersive estimate of the $a_{0} (980)$ contribution to $(g - 2)_{I^} ¼$

Oleksandra Deineka, Igor Danilkin, Marc Vanderhaeghen

A dispersive implementation of the $a_{0} (980)$ resonance to $(g - 2)_{I^} ¼$ requires the knowledge of the double-virtual $S$ -wave $Î³^*Î³^*\toÏÎ·/ K K(I=1)$ amplitudes. To obtain these…

Coupled-channel Omnès matrix for the D-wave isoscalar ππ/KKˉ system and its application to J/ψ→π0π0γ,KS​KS​γ

A dispersive estimate of the a0​(980) contribution to (g−2)I^​¼

Coupled-channel Omnès matrix for the $D$ -wave isoscalar $π π / K K ˉ$ system and its application to $J / ψ \to π^{0} π^{0} γ, K_{S} K_{S} γ$

A dispersive estimate of the $a_{0} (980)$ contribution to $(g - 2)_{I^} ¼$