Leif Lönnblad and Malin Sjödahl
Central Exclusive Scalar Luminosities from the Linked Dipole Chain Model Gluon Densities
Published in J. High Energy Phys. 02 (2004) 043.

We investigate the implication of uncertainties in the unintegrated gluon distribution for the predictions for central exclusive production of scalars at hadron colliders. We use parameterizations of the k_T-unintegrated gluon density obtained from the Linked Dipole Chain model, applying different options for the treatment of non-leading terms. We find that the luminosity function for central exclusive production is very sensitive to details of the transverse momentum distribution of the gluon which, contrary to the k_T-integrated distribution, is not very well constrained experimentally.

LU TP 03-47