TAR Yields extraction 0. 25 p(Gev/c) 0.5<p.Gev/c)<0.55 234353土0247030 slop:3231610522148 pure r mean.385051:0000143 ra200345796:0000107 STAR Preliminary STAR Preliminary Log,(de/d×) keV/cm Log, (de/dx)[keV/cm] k mean:027701136 05≤p(Gevc)<0.55 Constan354251:133798 1253:2.749005 STAR Preliminary STAR Preliminary 1000 Log, (de/dx)[keV/cm e Jin-------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------- F. Jin 7 e  Yields extraction e e