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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).
The reaction e + e − → ηπ + π − has been studied with the Neutral Detector in the CM energy range 1.05–1.40 GeV at VEPP-2M. At the maximum energy the cross section exceeds the prediction of the vector dominance with one ϱ(770). The following upper limits for the electron width times branching ratio into ηπ + π − have been obtained for a resonance with a mass of 1.28 GeV and width of 0.08 GeV observed with the Omega-spectrometer at CERN: Λ ee · B ηππ < 9 eV, and for a ϱ′(1250) with a mass of 1.26 GeV and width of 0.125 GeV: Λ ee · B ηππ < 14 eV at 90% confidence level.
Axis error includes +- 10/10 contribution (RES-DEF(RES=ETA,DEF=530<M(2GAMMA)<570 MEV,BACK=CORRECTED)).
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Axis error includes +- 1/1 contribution (DUE TO BACKGROUND).
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The reaction e + e - → ωπ 0 → π 0 π 0 γ has been studied with the Neutral Detector at the VEPP-2M collider. The cross section values differ from the predictions of the vector dominance model with one ϱ(770) meson, and are consistent with the contributions of ϱ(770) and ϱ(1600). ϱ(1250) has not been observed.
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FIT IN THE RANGE OF KINETIC ENERGY OF FRAGMENTS FROM 4 TO 8 MEV/NUCLEON.
FIT IN THE RANGE OF KINETIC ENERGY OF FRAGMENTS FROM 4 TO 8 MEV/NUCLEON.
The polarization parameter in the reactions π−p→ηn and π−p→η′n at 40 GeV/c with −t ranging from 0 to 2.6 (GeV/c)2 and 1.0 (GeV/c)2, respectively, was measured in experiments using a propanediol polarized target. Only gamma particles from the neutral meson decay were detected. The polarization parameter of the first reaction turns out to be negative in a widet interval (0.05<−t<1.6 (GeV/c)2) and probably changes its sign at larger values oft. The average value of the polarization parameter of the second reaction is equal to −17±8)% in the region 0.05<−t<0.5 (GeV/c)2.
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