Equivalent photons at the LHC: pp(γγ) → ppl+l-, Pb Pb (γγ) → Pb Pb l+l- Mikhail Vysotsky and Evgenii Zhemchugov EPJ Web Conf., 191 (2018) 02015 Published online: 31 October 2018 DOI: 10.1051/epjconf/201819102015