Central Exclusive $\pi^{+}\pi^{-}$ Production in $p\bar{p}$ Collisions at $\sqrt{s}$ = 0.9 and 1.96 TeV at the Tevatron

Exclusive pi(+)pi(-) production in proton-antiproton collisions at root s = 0.9 and 1.96 TeV in the Collider Detector at Fermilab has been measured. We selected events with exactly two particles with oposite charge, in vertical bar eta vertical bar < 1.3, with no other particles detected in vertical bar eta vertical bar < 5.9. We require the central pi(+)pi(-) to have rapidity vertical bar y vertical bar < 1. Since these events are dominated by double pomeron exchange, the quantum numbers of the central state are constrained. The data show resonance structures attributed to the f(0) and f(2) mesons.