-nucleus potential and (,) inclusive spectrum at production threshold region

Kono, Michio*; Hashimoto, Shintaro  

The (,) production inclusive spectrum is reinvestigated in view of the very weak -nucleus potential predicted by microscopic calculations with the SU quark-model baryon-baryon interaction. The inclusive spectrum is evaluated by the semiclassical distorted wave (SCDW) method. The explicit comparison of the strength function with that of the Green function method demonstrates the quantitative reliability of the SCDW approximation. It is presumed that the presently available data at the production threshold region does not necessarily imply the attractive strength of the order of MeV for the -nucleus potential in a conventional Woods-Saxon form. Instead, an almost zero potential is preferable.