Central Exclusive π+π− Production in pp̄ Collisions at √s = 0.9 and 1.96 TeV at the Tevatron
1 Forschungszentrum Jülich, 52425 Jülich, Germany
2 University of Cologne, 50937 Cologne, Germany
3 Fermi National Accelerator Laboratory, 60510 Batavia, USA
a e-mail: email@example.com
Published online: 26 November 2014
Exclusive π+π− production in proton-antiproton collisions at √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 |η| < 1.3, with no other particles detected in |η| < 5.9. We require the central π+π− to have rapidity |y| < 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 f0 and f2 mesons.
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