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Study of the centrally produced ππ and KK systems
Authors
T.A. Armstrong Benayoun, M. Beusch, W. Bloodworth, I.J. Carney, J.N. Childs, R. Evangelista, C. French, B.R. Ghidini, B. Girone, M. Jacholkowski, A. Kahane, J. Kinson, J.B. Kirk, A. Knudson, K. Lenti, V. Leruste, Ph. Malamant, A. Narjoux, J.L. Navach, F. Palano, A. Quercigh, E. Redaelli, N. Rossi, L. Sené, M. Stassinaki, M. Trainor, M.T. Vassiliadis, G. Villalobos Baillie, O. Votruba, M.F.
Publication date
1 January 1991
Publisher
Abstract
We have studied the ππ and K K ̄ systems centrally produced in proton collisions at 300 GeV/c. Clear evidence for S*/fhook0(975) production is observed. An analysis performed on the π+π- mass spectrum in the 1.0 GeV region, using a coupled channel formalism, shows that it is possible to describe the S*/fhook0(975) effect with one single resonance, and requires interference of the S*/fhook0(975) with the S-wave background. The resulting S*/fhook0(975) parameters are m0 = 979 ± 4 MeV, gπ = 0.28 ± 0.04, gK = 0.56 ± 0.18. Evidence is found for a structure having a mass of 1472 ± 12 MeV and a width of 195 ± 33 MeV. © 1991
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Last time updated on 10/02/2023