Exclusive K+K- production by double pomeron exchange at the Fermilab Bevatron

We present data from proton-antiproton collisions at $\sqrt{s}$ = 1.96 TeV collected by the CDF experiment, in which a K+K- pair is reconstructed in the central region $|\eta| <$ 1.0, and no other particles are detected in the range -5.9 $< \eta <$ +5.9. Hadron collisions with such large rapidity gaps are described by double pomeron exchange where the central state has Q = B = S = 0, isospin I = 0, even spin J, positive parity P and positive charge parity C.It is therefore a quantum number filter, of particular interest for states with high gluon content, such as hybrids and glueballs.