Conveners
Parallel 8
- Lorenzo Tancredi (TUM)
Parallel 8
- Lorenzo Tancredi (TUM)
I this talk, I will present recent integrations of all the necessary antenna functions in final-final kinematics at N$^3$LO, and the study of their infrared structure. I will describe how these universal ingredients can be used to construct subtraction terms for simple processes with final-state QCD radiation, such as jet production in lepton collisions.
We present a subtraction scheme for the calculation of real-radiation integrals at NLO in hybrid kT-factorization. The main difference with known methods for collinear factorization is that we subtract the momentum recoil, occurring due to the mapping from an (n+1)-particle phase space to an n-particle phase space, from the initial-state momenta, instead of distributing it over the final-state momenta.
A universal numerical approach for computing loop amplitudes would permit to achieve high precision in theoretical predictions for a wide range of phenomenologically relevant processes. A major obstacle in developing such methods is the treatment of infrared and ultraviolet singularities. These need to be removed at the integrand level before numerical integration becomes feasible. In this...
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...
In my talk I present the first numerical implementation of the LASS scheme to calculate event shape observables for three-jet production in electron-positron annihilation at Next-to-Next-to-Leading Order accuracy in QCD. Since these observables were already calculated in the past by other subtraction schemes I plan to make a detailed comparison of the various methods with emphasis on CPU time...
In this talk I will present the status of a calculation of $RV$ and $VV$ contributions to 3-jet production in electron-positron annihilation at NNLO within the framework of Local Analytic Sector Subtraction. We will demonstrate the cancellation of infrared singularities and put on display the results of a numerical phase-space integration over the finite remainders. This is a step forward...
