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The cross section per nucleon is evaluated with assumption of the linear atomic number dependence. SIG(C=NEUTRINO) and SIG(C=ANTINEUTRINO) are corresponded to the NUMU and NUMUBAR data, respectevly. CLOOP-OVER.
The reaction π−p→η′η′n has been studied atpπ=37 GeV/c. Total of 14 events of this reaction have been selected. It has been shown that in the effective mass spectrum of the η′η′ system the events are concentrated mainly near the reaction threshold, which might be caused by the decayX(1910)→η′η′. The reaction cross-section has been evaluated: σ(π−p→η′η′n)=110±40 nb.
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NUCLEUS IS P, C, AL, CU.
NUCLEUS IS P, C, AL, CU.
NUCLEUS IS P, C, AL, CU.
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Inclusive production ofK0 andK* (892)0 mesons inK+A-interactions (A=Be, Cu, Pb) at the energy 11.2 GeV has been investigated to study hadronisation of the leading\(\bar s\)-quark; the results are presented. Double differential cross sections d2σ/dxfdpt2 were measured in the region of incident particle fragmentation (0.4≦xf≦1,pt≦0.5 GeV/c). The experimental data obtained were analysed on the basis of the Lund model FRITIOF and a quark-gluon model that takes into account colour screening and hadron formation length effects. The experimental data confirm the picture of hadronisation of the leading\(\bar s\)-quark developed in the latter model.
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The reaction π − N→π − ηηN off a carbon nucleus at P π =36 GeV/ c has been studied with the help of the wide aperture magnetic spectrometer VES. In the π − ηη system a resonance with M =1814±10 (stat.)±23 (syst.) MeV, Γ =205±18 (stat.)±32 (syst.) MeV has been observed. Its most probable quantum numbers are I G =1 + or 2 − .
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