Light-by-light scattering cross-section measurements at the lhc

Light-by-light (LbyL) scattering, gamma gamma -> gamma gamma, is a rare Standard Model (SM) process, also proposed as a sensitive channel to study physics beyond the SM. In these proceedings, we perform a statistical combination of existing gamma gamma -> gamma gamma cross section measurements at the LHC with the aim of checking the consistency with different SM predictions. Using a simplified set of assumptions, we find the averaged result of 115 +/- 19 nb, consistent with SM predictions within two standard deviations. For the first time, we also consider the contribution from the eta(b)(1S) meson production to the diphoton invariant mass distribution.