- Conference date: 10–15 September 2012
- Location: Puerto del Carmen, Lanzarote
At the Fermilab Tevatron with and 1960 GeV, we have studied exclusive double pomeron exchange in the Collider Detector at Fermilab, CDF. With ∼300,000 events we present the mass spectrum of two hadrons, h + h −, assumed to be pions, with |η(π)| < 1.3 and two rapidity gaps Δη > 4.6. The mass spectrum shows resonance structures, including f 0(980), f 2(1270), and f 0(1370). The cross section ratio 1960 GeV/900 GeV and the mean pT (pair) show massdependent structures, even above M = 2 GeV where there are no established π+π− resonances. The data extend above M = 5 GeV. We place an upper limit on exclusive χ c0 →π+π− and K + K −.
- Cumulative distribution functions
- Mass spectra
- Hadron production
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