A search for glueballs and a study of doouble pomeron exchange at the CERN intersecting storage rings

T. Åkesson*, M. G. Albrow, S. Almehed, R. Batley, O. Benary, H. Bøggild, O. Botner, H. Breuker, V. Burkert, R. Carosi, A. A. Carter, J. R. Carter, P. C. Cecil, S. U. Chung, W. E. Cleland, D. Cockerill, S. Dagan, E. Dahl-Jensen, I. Dahl-Jensen, P. DamG. Damgaard, W. M. Evans, C. W. Fabjan, P. Frandsen, S. Frankel, W. Frati, M. D. Gibson, U. Goerlach, M. J. Goodrick, K. H. Hansen, V. Hedberg, J. W. Hiddleston, H. J. Hilke, G. Jarlskog, T. Killian, R. Kroeger, K. Kulka, J. v.d. Lans, J. Lindsay, D. Lissauer, B. Lörstad, T. Ludlam, A. Markou, N. A. McCubbin, U. Mjörnmark, R. Møller, W. Molzon, B. S. Nielsen, A. Nilsson, L. H. Olsen, Y. Oren, T. W. Pritchard, L. Rosselet, E. Rosso, A. Rudge, I. Stumer, M. Sullivan, J. A. Thompson, G. Thorstenson, E. Vella, D. Weygand, J. G. Williamson, W. J. Willis, M. Winik, W. Witzeling, C. Woody, W. A. Zajc

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

130 Scopus citations

Abstract

We present results from a study of centrally produced mesons in 3 × 106 events with two small-angle protons at the CERN Intersecting Storage Rings. A high-statistics sample of exclusive pp → ppπ+π- events at √s = 63 GeV has been obtained, where the reaction mechanism is dominated by double pomeron exchange. Scalar or tensor glueballs may be produced by this process. The π+π- mass spectrum has a distinctive structure, and analysis shows that the data are dominantly S-wave up to 1600 MeV. The behaviour of the D-wave provides evidence for a 2++ resonance (M = 1480 ± 50 MeV, Γ = 150 ± 50 MeV) in addition to the f(1270). We also show data on exclusive K+K-, pp, and π+π-π+π- production, and on the analogous reaction αα → ααπ+π- at √s = 126 GeV. Flavour independence is suggested by the observation of approximately equal numbers of K+K- and π+π- pairs for mass above 1 GeV. The mass spectra are also apparently independent of √s (45, 63, 126 GeV) and incident particle type (p, α).

Original languageEnglish
Pages (from-to)154-184
Number of pages31
JournalNuclear Physics, Section B
Volume264
Issue numberC
DOIs
StatePublished - 1986
Externally publishedYes

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