0000000001306385
AUTHOR
V.f. Perepelitsa
First observation of strong OZI rule violation in πN interactions
The data of the CERN WA56 experiment that triggered the fast proton produced in the $\pi^{+}p$ and $\pi^{-}p$ interactions at beam momenta 20 GeV/c and 12 GeV/c, respectively, are used to analyse the final states $ p_{f} \phi (\omega)\pi^{\pm}$. A large excess (up to two orders of magnitude) of the $\phi/\omega$ cross sections ratio over the OZI prediction is observed.
New evidence for a narrow state of mass 2.02 GeV/c2
Abstract We report evidence for the existence of a narrow p p state with a mass of 2.02 GeV/c2 and a width of about 0.02 GeV/c2, produced centrally in π+p(π−p) interactions at 20(12) GeV/c in several final states, proceeding via baryon exchange mechanism, and that could be interpreted as a baryonium candidate. The data come from the analysis of WA56 experiment made at the CERN Ω spectrometer.
Observation of meson central production in baryon exchange processes
The central production of ρ0,f2 and ρ30 mesons is observed for the first time in processes which are originated by π+p reactions proceeding via baryon exchange mechanism. The data come from the CERN WA56 experiment designed to separate the baryon exchange reactions in π+p-collisions at 20 GeV/c. We report on the measured integral and differential cross sections and also give the density matrix elements of the meson resonances observed.
Backward production of mesons associated with? ++(1232) in? + p interactions at 20 GeV/c
We have analyzed backward meson production inπ + p reactions at 20GeV/c, which were measured in the CERN Ω spectrometer triggered by a fast proton (p f ), in experiment WA56. Production via baryon exchange of quasi-two-body final statesΔ ++ (1232)ρ 0 (770),Δ ++ (1232)f 2 (1270), andΔ ++ (1232)ρ 3 0 (1690) is clearly identified. The density matrix elements of meson resonances and ofΔ ++ (1232) are analyzed. We have observed also the reactionsπ + p→Δ ++ (1232)π 0 andπ + p→Δ ++ (1232)ω in thep f π + π 0 andp f π + π + π − π 0 final states.
"Table 2" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 10" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 5" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 6" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 8" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 3" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 4" of "First observation of strong OZI rule violation in pi N interactions."
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"Table 1" of "First observation of strong OZI rule violation in pi N interactions."
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