New opportunities at the photon energy frontier

/ Authors

J. Adam, C. Aidala, A. Angerami, B. Audurier, C. Bertulani, C. Bierlich, B. Blok, J. Brandenburg, S. Brodsky, A. Bylinkin

and 65 more authors

V. C. Roman, F. Celiberto, J. Cepila, G. Chachamis, B. Cole, G. Contreras, D. d’Enterria, A. Dumitru, A. F. T'ellez, L. Frankfurt, M. Ducati, F. Geurts, G. Silveira, F. Giuli, V. Gonçalves, I. Grabowska-Bold, V. Guzey, L. Harland–Lang, M. Hentschinski, T. Hobbs, J. Jalilian-Marian, V. Khoze, Yongsung Kim, S. Klein, S. Knapen, M. Kłusek-Gawenda, M. Krelina, E. Kryshen, T. Lappi, C. Loizides, A. Luszczak, M. Machado, H. Mantysaari, D. Martins, R. McNulty, M. Murray, J. Nemchik, J. Noronha-Hostler, J. Nystrand, A. Papa, B. Pire, M. Płoskoń, M. Przybycien, J. Ralston, P. R. Teles, C. Royon, B. Schenke, W. Schmidke, J. Seger, A. Staśto, P. Steinberg, M. Strikman, A. Szczurek, L. Szymanowski, D. Takaki, R. Ulrich, O. Baillie, R. Vogt, S. Wallon, M. Winn, K. Xie, Zhangbu Xu, Shuaixi Yang, M. Zhalov, Jian Zhou

/ Abstract

Ultra-peripheral collisions (UPCs) involving heavy ions and protons are the energy frontier for photon-mediated interactions. UPC photons can be used for many purposes, including probing low-$x$ gluons via photoproduction of dijets and vector mesons, probes of beyond-standard-model processes, such as those enabled by light-by-light scattering, and studies of two-photon production of the Higgs.