QCD with SLD Toshinori Abe

We present selected new results on strong interaction physics from the SLD experiment at the SLAC Linear Collider (SLC), symmetry tests of b bg vertex, the rate of secondary b b production via gluon splitting, the B hadron energy spectrum and rapidity correlations between identi ed charged hadrons. The parity violation in Z ! b bg decays is consistent with electroweak theory plus QCD. New tests of Tand CP-conservation at the bbg vertex are performed. A new measurement of the rate of gluon splitting into b b pairs yields gb b = 0:00307 0:00071(stat:) 0:00066(syst:) (Preliminary). The B hadron energy spectrum is measured using a new inclusive technique, allowing tests of predictions for its shape and a measurement of hxBi = 0:714 0:005(stat:) 0:007(syst:) (Preliminary). A study of correlations in rapidity between pairs of identi ed , K and p/ p con rms that strangeness and baryon number are conserved locally, and shows local charge conservation between meson-baryon and strange-nonstrange pairs. Flavor-dependent long-range correlations are observed for all combinations of these hadron species. The rst study of correlations using signed rapidities is done and nd the rst direct observation of baryon number ordering along the q q axis. Presented at the XXIX International Symposium on Multiparticle Dynamics (ISMD99) Brown University, Providence, USA August 9-13, 1999 Work supported by Department of Energy contract DE{AC03{76SF00515.