Evidence for Structure in the 1.7-{GeV} Mass Region of the $K^+ K^-$ Final State Centrally Produced in the Reactions $\pi^+ p \to \pi^+ (K^+ K^-$) $p$ and $p p \to p (K^+ K^-$) $p$ at 85-{GeV}/$c$

The Athens-Bari-Birmingham-CERN collaboration Armstrong, T.A. ; Bloodworth, I.J. ; Carney, J.N. ; et al.
Phys.Lett.B 167 (1986) 133-137, 1986.
Inspire Record 219229 DOI 10.17182/hepdata.30285

The reactions π + p → π + (K + K − )p and pp → p(K + K − )p where the K + K − system is centrally produced have been studied at 85 GeV/ c . The K + K − spectrum contains several structures in the regions of S ∗ ø , f A 2 and f′. Structure is observed in the 1.7 GeV mass region which cannot be attributed to the g meson. The most likely interpretation of the data is that we observe the θ with a mass of 1.742 GeV and a new resonance at a mass of 1.629±0.010 GeV with a width of 0.082±0.030 GeV.

1 data table

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