A study of the centrally produced 4pi channel in pp interactions at 450 GeV/c

Details A study of the centrally produced 4pi channel in pp interactions at 450 GeV/c A study of the centrally produced 4pi channel in pp interactions at 450 GeV/c

1997-07-09

arxiv.org/abs/hep-ex/9707021v1

Phys.Lett.B413:217-224,1997

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, Latex, 3 Figures

Scientific paper

10.1016/S0370-2693(97)01140-4

The reaction pp -> pf (pi+pi-pi+pi-) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. In addition to the well known f1(1285) there is evidence for two JPC=2-+ states called the eta2(1620) and eta2(1875) and a broad scalar called the f0(2000). The production of these states as a function of the dPT kinematical filter shows the behaviour expected for qqbar states. In contrast, there is evidence for two states at 1.45 GeV and at 1.9 GeV which do not show the behaviour observed for qqbar states.

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