Exclusive processes as a probe of gluon saturation at the EIC
The Electron-Ion Collider in the US will collide electrons with light and heavy nuclei over a wide kinematical domain, enabling precision studies of non-linear QCD dynamics in heavy nuclei. Exclusive processes are especially powerful, as at the leading order they are approximatively sensitive to the squared gluon distribution, and as such are sensitive probes of non-linear dynamics. I discuss how exclusive vector meson production at high energy can be used to probe the gluon saturation at the EIC, and also in ultra peripheral heavy-ion collisions at the LHC. In addition to saturation effects, I also discuss how it is possible to probe the spatial structure of protons and nuclei by measuring vector meson production differentially in t. I will also discuss our ongoing work where we calculate vector meson-scattered lepton correlations to get a more differential access to the gluonic structure of the target. Finally, I discuss exclusive dijet production where there are two momentum handles, the momentum imbalance and mean transverse momentum, which provide extra handle compared to the vector meson production. This makes it possible to constrain, for example, the Gluon Wigner distribution at small x.
H. Mäntysaari, K. Roy, F. Salazar, B. Schenke, in progress
H. Mäntysaari, N. Mueller, F. Salazar, B. Schenke, Phys.Rev.Lett. 124 (2020) no.11, 112301
H. Mäntysaari, N. Mueller, B: Schenke, Phys.Rev. D99 (2019) no.7, 074004
H. Mäntysaari, B. Schenke, Phys.Rev.Lett. 117 (2016) no.5, 052301
Moderator: Jarkko Peuron
Heikki Mäntysaari is a Academy of Finland postdoctoral researcher at University of Jyväskylä. He completed his PhD there in 2015. From 2015 to 2017 he was a postoctoral research associate at Brookhaven National Laboratory. Starting from October 2017 he has been a postdoctoral researcher at University of Jyväskylä, and since 2018 he has been funded by the Academy of Finland.