Predictions of exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">?</mml:mi></mml:math> photoproduction at the LHC and future colliders

The cross section for exclusive $\mathrm{\ensuremath{\Upsilon}}$ ultraperipheral photoproduction at present and future colliders is determined using the low $x$ gluon parton distribution function extracted from an analysis of $J/\ensuremath{\psi}$ measurements performed Hadron-Electron Ring Accelerator Large Hadron Collider. Predictions are given next-to-leading order in collinear factorization over a wide $\ensuremath{\gamma}p$ centre-of-mass energy range, calculated assuming nonrelativistic approximation wave function, with skewing corrections incorporated.