Scattering amplitudes are the arena where quantum field theory directly confronts experiment. At the LHC, quarks and gluons inside each proton slam together, producing a cornucopia of jets, electroweak bosons, the occasional Higgs boson, and perhaps the needles of new physics inside the haystack of the Standard Model. Advances in our theoretical understanding of scattering amplitudes have a practical benefit: they enable more precise predictions of Standard Model cross sections at the LHC, which in turn assist experimental measurements and searches for new particles. Yet these advances have also revealed beautiful and intriguing structures and patterns, both within individual theories and relating different theories to each other, which suggest that our fundamental understanding of quantum field theory is far from complete. June 18-22, SLAC will host the international conference Amplitudes 2018, which is devoted to the study of scattering amplitudes and related topics. Some of the topics to be explored include:

The Amplitudes series of international conferences began in 2009 and has grown in scope every year. Amplitudes 2018 will be the tenth in the series; previous editions were held at