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QCD with SLD
Author(s) -
Toshinori Abe
Publication year - 1999
Language(s) - English
Resource type - Reports
DOI - 10.2172/15076
Subject(s) - physics , particle physics , quantum chromodynamics , hadron , rapidity , baryon , strangeness , baryon number , electroweak interaction , nuclear physics , gluon , vertex (graph theory) , b meson , graph , mathematics , discrete mathematics
We present selected new results on strong interaction physics from the SLDexperiment at the SLAC Linear Collider (SLC), symmetry tests of b\bar{b}gvertex, the rate of secondary b\bar{b} production via gluon splitting, the Bhadron energy spectrum and rapidity correlations between identified chargedhadrons. The parity violation in Z0 --> b\bar{b}g decays is consistent withelectroweak theory plus QCD. New tests of T- and CP-conservation at theb\bar{b}g vertex are performed. A new measurement of the rate of gluonsplitting into b\bar{b} pairs yields g_{b\bar{b}}=0.00307 +- 0.00071 (stat.) +-0.00066 (syst.) (Preliminary). The B hadron energy spectrum is measured using anew inclusive technique, allowing tests of predictions for its shape and ameasurement of < x_B > = 0.714 +- 0.005 (stat.) +- 0.007 (syst.) (Preliminary).A study of correlations in rapidity between pairs of identified pions, kaonsand protons confirms that strangeness and baryon number areconserved locally,and shows local charge conservation between meson-baryon and strange-nonstrangepairs. Flavor-dependent long-range correlations are observed for allcombinations of these hadron species. The first study of correlations usingsigned rapidities is done and find the first direct observation of baryonnumber ordering along the q\bar{q} axis.

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