Two loop QCD amplitudes for di-pseudo scalar production in gluon fusion

Arunima Bhattacharya, Maguni Mahakhud, Prakash Mathews +1

We compute the radiative corrections to the four-point amplitude $g+g\to A+A$ in massless Quantum Chromodynamics (QCD) up to order $a_s^4$ in perturbation theory. We used…