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VOLUME 66 (1997) | ISSUE 2 | PAGE 69
The contribution of (t(τ)+N)-component to the α-particle wave function from the data on the reactions p(α, pp)t and p(α, pn)τ at the incident α-particle momentum 5 GeV/c
The 2-meter liquid-hydrogen bubble chamber was exposed to a separated beam of α-particles from ITEP synchrotron. Averaged over the fiducial volume of the chamber the momentum of the incident ^He nuclei was 5 GeV/c (the kinetic energy of initial protons in the nucleus rest frame was Tp = 620 MeV). The spectral functions of decays a —» tp and a —> τη were extracted in 4>r-geometry (the last one was extracted for the first time) from the exclusive reactions ap —> tpp and ap —f rpn in the spectator momenta region 0 < q < 0.3 GeV/c. The pole dominance criteria were checked carefully. By extrapolating the nuclear vertex function to the pole the lower bound of the nuclear vertex constant was obtained. Our experimental data are compared with the results of other studies and the theoretical calculations as well. PACS: 21.45.+V, 25.I0.-fs, 27.10.+h