We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 TeV, using data from (1.11 +/- 0.07) fb(-1) integrated luminosity taken by the Run II Collider Detector at Fermilab. We selected events with two electromagnetic showers, each with transverse energy E-T > 2.5 GeV and pseudorapidity |eta| p + e(+)e(-) + (p) over bar by two-photon exchange, while 43 events have no charged tracks. The number of these events that are exclusive pi(0)pi(0) is consistent with zero and is p + gamma gamma + (p) over bar with |eta(gamma)| 2.5 GeV is (2.48(-0.35)(+0.40)(stat)(-0.51)(+0.40)(syst)) pb
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have observed exclusive {gamma} production in proton-antiproton collisions at {radical}s = 1.96 T...
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have observed exclusive {gamma} production in proton-antiproton collisions at {radical}s = 1.96 T...
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have observed exclusive gamma gamma production in proton-antiproton collisions at root s = 1.96 T...
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....
We have observed exclusive {gamma} production in proton-antiproton collisions at {radical}s = 1.96 T...
We have searched for exclusive gamma gamma production in proton-antiproton collisions at root s = 1....