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Title: Exclusive Central $$\pi^{+}\pi^{-}$$ Production in Proton Antiproton Collisions at the CDF

Exclusive $$\pi^{=}\pi^{-}$$ production in proton-antiproton collisions at $$\sqrt{s}$$ = 0.9 and 1.96 TeV in the Collider Detector at Fermilab has been measured. We select events with two particles with opposite charge in pseudorapidity region -1.3 < $$\eta$$ < 1.3 with no other particles detected in -5.9 < $$\eta$$ < 5.9. Particles are assumed to be pions. The $$\pi^{+}\pi^{-}$$system is required to have rapidity -1.0 < $y$ < 1.0. The data are expected to be dominated by the double pomeron exchange mechanism. Therefore, the quantum numbers of the central state are constrained. The data extend up to dipion mass M($$\pi^{+}\pi^{-}$$) = 5000 MeV/$c^2$. Resonance structures consistent with $f_0$ and $f_2$(1270) mesons are visible. The results are valuable for light hadron spectroscopy and for providing information about the nature of the pomeron in a region between non-perturbative and perturbative quantum chromodynamics
Authors:
 [1]
  1. Julich, Forschungszentrum
Publication Date:
OSTI Identifier:
1250817
Report Number(s):
FERMILAB-CONF-15-538-PPD
1442307
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CDF
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS