literature

Observation of θ(1700)\theta(1700) and Ξ(2230)\Xi(2230) Resonances in πPKS0KS0N\pi^- P \to K^0_S K^0_S N Reaction at 40-{GeV}/c. (In Russian)

1987
13 pages
Published in:
  • Yad.Fiz. 46 (1987) 799-810,
  • Nucl.Phys.B 309 (1988) 426-438
  • Published: 1988
Experiments:

Citations per year

19891998200720162023012345
Abstract: (Elsevier)
The reaction π − p→K s 0 K s 0 n was studied at the incident momentum 40 GeV/ c making use of the 6 m magnetic spark spectrometer MSS ITEP. Partial wave analysis was carried out using ∼ 6700 events of this reaction with t ′<0.2 (GeV/ c ) 2 . In D 0 wave ( J PC =2 ++ ) we find three states besides the well-known resonances f(1270) and f′(1525): ϑ(1700) with the width 30 MeV, f″(1980) with the width 145 MeV (very likely a radial excitation of the f′(1525) meson) and ξ(2230) with the width 80 MeV. The measured width of the ϑ-meson is somewhat smaller, and that of the ξ-meson is somewhat higher than the known values from J ψ radiative decays. In S wave ( J PC =0 ++ ) we find the known states ϵ′(1440) and S ∗ (1720). Using the same data we studied the reaction K − p → K s 0 K s 0 Y ∗ , where f′(1525) was observed with very small background. No higher mass states were observed with appropriate statistical confidence. In particular, σ(ϑ(1700))× Br (ϑ → K K σ(f′(1520)) ⩽ 0.05 (90% c.l. ) , which implies that ϑ cannot be interpreted as an s s state.
  • PI- P: INELASTIC SCATTERING
  • INELASTIC SCATTERING: PI- P
  • PARTIAL WAVE ANALYSIS
  • F2(1270): HADROPRODUCTION
  • HADROPRODUCTION: F2(1270)
  • F2(1525): HADROPRODUCTION
  • HADROPRODUCTION: F2(1525)
  • F2(1720): HADROPRODUCTION
  • HADROPRODUCTION: F2(1720)
  • POSTULATED PARTICLE: X(2220)