X ray measurements in helium like atoms increased discrepancy between experiment and theoretical QED

Video abstract for the article ‘X-ray measurements in helium-like atoms increased discrepancy between experiment and theoretical QED‘ by C T Chantler, A T Payne, J D Gillaspy, L T Hudson, L F Smale, A Henins, J A Kimpton and E Takacs (C T Chantler et al 2014 New J. Phys. 16 123037).