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Axis error includes +- 0.0/0.0 contribution (?////DUE TO ABSORPTION CORRECTIONS//THE CORRECTION TO THE RATIO DEUT/P DUE TO DIFFERENCE OF PARTICLE ABSORPTION IN CHERENKOV COUNTERS WERE DETERMINED EXPERIMENTALLY (IN THE RANGE 6-45 PCT). THERE WAS THE CORRECTION OF ABOUT 19 PCT FOR ABSORPTION IN THE OTHER PARTS OF THE SPECTROMETER).
Axis error includes +- 0.0/0.0 contribution (?////DUE TO ABSORPTION CORRECTIONS//THE CORRECTION TO THE RATIO DEUT/P DUE TO DIFFERENCE OF PARTICLE ABSORPTION IN CHERENKOV COUNTERS WERE DETERMINED EXPERIMENTALLY (IN THE RANGE 6-45 PCT). THERE WAS THE CORRECTION OF ABOUT 19 PCT FOR ABSORPTION IN THE OTHER PARTS OF THE SPECTROMETER).
Axis error includes +- 0.0/0.0 contribution (?////DUE TO ABSORPTION CORRECTIONS//THE CORRECTION TO THE RATIO DEUT/P DUE TO DIFFERENCE OF PARTICLE ABSORPTION IN CHERENKOV COUNTERS WERE DETERMINED EXPERIMENTALLY (IN THE RANGE 6-45 PCT). THERE WAS THE CORRECTION OF ABOUT 19 PCT FOR ABSORPTION IN THE OTHER PARTS OF THE SPECTROMETER).
Evidence for narrow states produced by Σ − interactions in beryllium, and decaying into ( Λ p + pions ), has been obtained in an experiment at the CERN SPS hyperon beam. At 3.1 GeV/ c 2 , the ( Λ p π + π + ), ( Λ p π + π + π − ) and ( Λ p π + π − ) effective mass distributions show an excess of 45, 19 and 62 events above a background of 50, 28 and 187, respectively. The possibility that these three signals are statistical fluctuations is remote. The observed widths of the signals are compatible with the mass resolution of the apparatus, 24 MeV/ c 2 FWHM. We have not been able to find an interpretation of the quantum numbers of the final states, which are baryon number 0, strangeness −1 and charge +1, 0 and −1.
The cross section times branching fraction. The differential cross section is fitted by the equation : D3(SIG)/D3(P) = (1-XL)**POWER*EXP(-SLOPE*PT**2).
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MULTIPLICITIES OF PI0 WAS OBTANED FROM MULTIPLICITIES OF GAMMAS: MULT(PI0)=MULT(GAMMA)/2.
PI- NUCLEON= (PI- P + PI- N)/2.
PI- NUCLEON= (PI- P + PI- N)/2.
The spin correlation parameter A oonn and the analyzing powers A oono and A ooon were measured simultaneously, in the energy range 0.5–0.8 GeV and in the angular region 40°–80° CM. The experiment used the polarized proton beam of SATURNE II and the Saclay frozen spin polarized target.
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The spin correlation parameter A oonn (pp) and the analyzing power A oono (pp) have been measured in the angular region 45°< θ CM <90° at 0.834, 0.874, 0.934, 0.995 and 1.095 GeV beam kinetic energy using the SATURNE II polarized proton beam incident on the polarized proton target.
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The analysis of exclusive neutral strange particle production in the reactions π − p → K° Λ + K° Σ ° and p p → Λ Λ + Λ Σ° + c.c. at 3.15, 4.95, 7.9 and 12 GeV/ c yielded the differential cross section distributions up to about 90° c.m.s. scattering angle and the Λ-particle polarization at large transverse momentum. Applying a fit to d σ /d t ∞ s − n resulted in n = 8.6 ± 0.9 for the K° Λ + K° Σ° final state which is compatible with the quark counting rule n = 8 for meson-baryon reactions. The average Λ polarization around t = −1.6 (GeV/ c ) 2 was P Λ = 0.79 ± 0.17 at 3.15 GeV/ c beam energy.
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