Speaker
Dr
Michael Albrow
(Fermi National Accelerator Laboratory)
Description
We measure exclusive pi+pi- production in proton-antiproton collisions at center-of-mass energies sort(s) = 0.9 and 1.96 TeV in the Collider Detector at Fermilab. We select events with two oppositely charged particles, assumed to be pions, with pseudorapidity
|eta| < 1.3 and with no other particles detected in |eta| < 5.9. We require the pi+pi- system to have rapidity |y| < 1.0. The production mechanism of these events is expected to be dominated by double pomeron exchange, which constrains the quantum numbers of the central state. The data are potentially valuable for isoscalar meson spectroscopy, and for understanding the pomeron in a region of transition between nonperturbative
and perturbative quantum chromodynamics. The data extend up to dipion mass 5000 MeV/c2, and show resonance structures attributed to f0 and f2(1270) mesons. From the pi+pi- and
K+K- spectra we place upper limits on exclusive chi_c0(3415) production.
Primary author
Dr
Michael Albrow
(Fermi National Accelerator Laboratory)
