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Study of the centrally produced ππ andK Ksystems

Authors
Journal
Nuclear Physics B - Proceedings Supplements
0920-5632
Publisher
Elsevier
Publication Date
Volume
21
Identifiers
DOI: 10.1016/0920-5632(91)90235-7

Abstract

Abstract We have studied the ππ and K K ̄ systems centrally produced in proton collisions at 300 GeV/c. Clear evidence for S ∗/ƒ 0(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 ∗/ƒ 0(975) effect with one single resonance, and requires interference of the S ∗/ƒ 0(975) with the S-wave background. The resulting S ∗/ƒ 0(975) parameters are m 0 = 979 ± 4 MeV, g π = 0.28 ± 0.04, g K = 0.56 ± 0.18. Evidence is found for a structure having a mass of 1472 ± 12 MeV and a width of 195 ± 33 MeV.

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