THE CONTRIBUTION OF THE (T(TAU)-PARTICLE WAVE-FUNCTION FROM DATA ON THE REACTIONS P(ALPHA,PP)T AND P(ALPHA,PN)TAU AT INCIDENT ALPHA-PARTICLE MOMENTUM 5 GEV(N) COMPONENT TO THE ALPHA)C/

The 2-meter liquid-hydrogen bubble chamber is exposed to a separated b eam of alpha particles from the ITEP synchrotron. The momentum of the incident He-4 nuclei, averaged over the fiducial volume of the chamber , is 5 GeV/c (the kinetic energy of initial protons in the nucleus res t frame is T-p = 620 MeV). The spectral functions of decays alpha-->tp and alpha-->tau n are extracted in the 4 pi geometry (the latter is e xtracted for the first time) from the exclusive reactions alpha p-->tp p and alpha p-->tau pn in the spectator momentum region 0<q<0.3 GeV/c. The pole dominance criteria are carefully checked. Extrapolation of t he nuclear vertex function to the pole gives a lower bound on the nucl ear vertex constant. Our experimental data are compared with the resul ts of other studies and with theoretical calculations. (C) 1997 Americ an Institute of Physics.