Speaker
Matilde Vicini
(ETH zurich)
Description
We present numerical loop (and phase-space) integration for the virtual correction to the process $q \bar{q} \to \gamma \gamma \gamma$ and $q \bar{q} \to \gamma^* \gamma^* \gamma^*$ at one-loop and two-loop $N_f$ orders. The approach involves employing infrared and ultraviolet local subtraction counterterms to achieve a locally finite amplitude in 4 dimensions. Subsequently, this locally finite amplitude is numerically integrated in loop momentum space using the cross-free-family representation and the threshold subtraction technique. Finally, the infrared and ultraviolet counterterms are analytically integrated to obtain the complete result.
Author
Matilde Vicini
(ETH zurich)
Co-author
Dario Kermanschah
