Monte-Carlo tool SANCphot for polarized γγ collision simulation

Abstract

Our study of theoretical uncertainties for the four bosons processes at one-loop level including the case of the transverse polarization is presented. The calculations are based on helicity amplitudes approach for 4-boson SM interactions through a fermion and boson loops. The computation takes into account nonzero mass of loop particles. The obtained predictions are equally suitable for a wide range of energies and for arbitrary, including extreme, regions of the phase volume. Uncertainty estimates are received using the new Monte-Carlo tool SANCphot for γγ collision simulation with final states γγ, γZ, ZZ adapted for polarized γ beams. Program summaryProgram Title: sancphot-v1.01CPC Library link to program files:https://doi.org/10.17632/5sn9nywv2b.1Licensing provisions: LGPLProgramming language: Fortran, C, C++Nature of problem: Theoretical calculations at next-to-leading order in perturbation theory allow to compute higher precision amplitudes for Standard Model processes and decays, provided proper treatments of UV divergences and IR singularities are performed.Solution method: Numerical integration of the precomputed differential expressions for polarized photon-photon cross sections of four-boson interaction processes implemented as SANC modules [1].Additional comments including restrictions and unusual features: Uses subprograms Looptools [2], Cuba [3].The list of processes is limited to photon-photon, photon-Z and Z-Z collisions.