Speaker
Chris Flett
Description
We discuss exclusive heavy vector meson photoproduction in proton-proton and lead-lead ultraperipheral collisions (UPCs) at the LHC, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low $x$ resummation and implementation of a crucial low $Q$ subtraction included. We compare and contrast predictions in both frameworks and make a comparison with data from HERA and LHC. Time permitting, we will also discuss asymmetric proton-lead collisions. We conclude by remarking obout the possibility to constrain and ultimately determine the low $x$ and low scale gluon PDF in the proton and heavy nuclei, emphasising the significance of this for future global PDF analyses.
| Preferred track | Forward & Diffractive Physics |
|---|---|
| Subfield | HEP theory |
| Attending in-person? | Yes |
| On behalf of collaboration? | No |
