Speaker
Description
Elastic light-by-light (LbL) scattering, one of the most fascinating processes in the Standard Model (SM), has recently been observed in the ultraperipheral collisions (UPCs) of relativistic heavy ions in the Atlas and CMS experiments at the Large Hadron Collider (LHC). Recognizing that the incident quasi-real photons in LbL scattering are strongly linearly polarized, we re-investigate the LbL scattering at UPCs by incorporating the joint dependence of the impact parameter and transverse momenta of the incident photons. We calculate the spectra of transverse momentum, invariant mass and rapidity. Moreover, we show that the linear polarization of incident photons generates a sizable cos2ϕ-type azimuthal modulation, which awaits the test in future LHC and EIC/EicC experiments
