120 / 2023-04-14 12:04:28

Signatures of two-photon Breit-Wheeler process in the polarized γγ collider

Breit-Wheeler process, polarized gamma photon

极端光下的基础物理学 > QED效应和核物理-海报

The rapid development of ultraintense ultrashort laser techniques have followed the advent of petawatt laser systems. Polarized particles can be generated in laser-plasma acceleration experiments by focusing laser light on a prepolarized target, or from the polarization build-up in strong-field QED interactions between the laser and particles. Taking advantage of the laser-driven high-density polarized particle sources, it should be possible to verify the fundamental QED predictions, such as photon-photon collisio. Although the linear Breit-Wheeler (LBW) pair production is observed in the collision of two virtual photons by means of the equivalent photon approximation of ultra-relativistic heavy-ion beams, the validation via real photon-photon collisions has never been realized due to the lack of high-brilliance \(\gamma\)-photon beam. In this report, I will introduce the Monte Carlo simulation of the completely polarized LBW process, among which the qualitative signatures of polarized LBW process are imprinted on momenta and spins of produced pairs. These results of polarized LBW process are effective to calibrate and monitor the upcoming polarized \(\gamma\gamma\) collider, and pave the way for proceeding the elusive photon-photon scattering.