  Central exclusive production (CEP) processes in high-energy hadron-hadron
collisions provide an especially clean environment in which to measure the
nature and quantum numbers (in particular, the spin and parity) of new
resonance states. Encouraged by the broad agreement between experimental
measurements and theoretical predictions based on the Durham approach, we
perform a detailed phenomenological analysis of diphoton and meson pair CEP
final states, paying particular attention to the theoretical uncertainties in
the predictions, including those from parton distribution functions,
higher-order perturbative corrections, and non-perturbative and proton
dissociation contributions. We present quantitative cross-section predictions
for these CEP final states at the RHIC, Tevatron and LHC colliders.
