A spin determination of the Ξ* (1820) resonance
Physics Letters B 77:4-5 (1978) 451-453
Abstract:
Using a spin test proposed recently by Minnaert, we determine the spin of the Ξ* (1820) resonance to be 3 2. © 1978.Rare decay modes of K*(1420) and K*(892)
Nuclear Physics, Section B 139:4 (1978) 383-393
Abstract:
A 2.5 standard deviation signal is observed for the decay K*-(1420) → K*-(892)π+π-. From this signal a partial width of 13.0 ± 5.0 MeV for the decay mode K*(1420)→K*(892)ππ is deduced under the assumption that the ππ system is in an I = 1 state. For the rare decay mode K*(892)→Kππ no signal is observed. The following upper limits can be given for the decay widths: ΓK*-(892) → K-π+π- < 40 keV, ΓK*-(892) → K0π-π0 < 35 keV, ΓK*0(892) → K0π+π- < 35 keV. © 1978.Backward production of a spin-parity 1+ Kϱ resonance at 1.28 GeV
Physics Letters B 76:4 (1978) 517-522
Abstract:
A (Kππ)+ mass enhancement is observed in the reactions K-p → Ξ -Ko+π+πo- when events with a small (K- → Ξ-) four momentum transfer squared are selected. The signal is also visible in the reaction K-p → Ξ-π++ neutrals. The enhancement, centered at 1.28 GeV, is seen to decay preferentially into Kρ{variant} with spin-parity JP = 1+. The cross section for K-p→ Ξ-C+(1.28) with C+ → Kρ{variant} at 4.15 GeV/c incident K- momentum is (6.2 ± 0.6) μb. © 1978.Non-strange vector meson production in K-p interactions at 4.2 GeV/c
Nuclear Physics, Section B 133:1 (1978) 38-92
Abstract:
The vector meson production, hypercharge exchange reactions K-p → (φ, ω, ρ{variant}) Λ and (φ, ρ{variant}) Σ0 are studied at 4.2 GeV/c incident momentum. The data come from a high statistics bubble chamber experiment with a sensitivity of ∼ 120 events/μb. Total and differential cross sections are presented. The vector meson density matrix elements and hyperon polarization are investigated as functions of momentum transfer. Amplitude analyses are performed for all five reactions. The results are compared with duality and quark model predictions, as well as used to test current ideas in two-body phenomenology. © 1978.ANI=1 ENHANCEMENT AT A MASS OF 1550 MEV IN (LAMBDA-PI) AND (SIGMA-PI) SYSTEMS
PHYSICS LETTERS B 78:1 (1978) 154-157