Polarized light-by-light scattering at the CLIC induced by axion-like particles
Abstract
The light-by-light (LBL) scattering with initial polarized Compton backscattered photons at the CLIC, induced by axion-like particles (ALPs), is investigated. The total cross sections are calculated, assuming CP-even coupling of the pseudoscalar ALP to photons. The 95\% C.L. exclusion region for the ALP mass ma and its coupling constant f is presented. The results are compared with previously obtained CLIC bounds for the unpolarized case. It is shown that the bounds on f for the polarized beams in the region ma = 1000 \ GeV - 2000 \ GeV, with the collision energy 3000 GeV and integrated luminosity 4000 fb-1, are on average 1.5 times stronger than the bounds for the unpolarized beams. Herewith, our CLIC bounds are stronger than all current exclusion regions for ma > 80 GeV. In particular, they are more restrictive than the limits which follow from the ALP-mediated LBL scattering at the LHC.