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
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CDF
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1250817
- Report Number(s):
- FERMILAB-CONF-15-538-PPD; 1442307
- Country of Publication:
- United States
- Language:
- English
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