Representing The SLD Collaboration
نویسنده
چکیده
We report new preliminary B Physics results obtained with 300,000 hadronic Z decays collected by the SLD experiment at the SLC between 1993 and 1997. Three analyses are presented: a measurement of B and B d lifetimes, a study of the time dependence of B s–B 0 s mixing, and a search for decays of the type b → s g. All analyses benefit from the small and stable interaction point and the excellent resolution and efficiency provided by the pixel-based CCD Vertex Detector. The b → s g analysis also exploits the particle identification capabilities of the Cherenkov Ring Imaging Detector. Invited talk presented at the 33rd Rencontres de Moriond: Electroweak Interactions and Unified Theories Les Arcs, France 14-21 March 1998 Work supported by Department of Energy contract DE–AC03–76SF00515.
منابع مشابه
± , K ± , p and p̄ in Quark , Antiquark and Gluon Jets
Representing the SLD collaboration We present measurements of identified charged hadron production over a wide momentum range using the SLD Cherenkov Ring Imaging Detector. In addition to studying particle production in flavor-inclusive Z 0 decays, we compare the production in decays into light, c and b flavor events. We also examine particle production in gluon jets with that in light quark je...
متن کاملHadron Fragmentation Functions and Leading Particle Effects in Hadronic Z 0 Decays: New Results from Sld
We have measured the di erential cross sections for the production of , K , K, K (892), (1020), p and in hadronic Z decays and in subsets of avor-tagged Z ! light quark (u u, d d, or s s) , Z0! c c and Z ! b b events. Charged hadrons were identi ed with the SLD Cherenkov ring imaging detector. The vertex detector was employed to select avor enriched samples and the polarized electron beam from ...
متن کاملRepresenting the SLD Collaboration
Using hadronic ZO decays recorded by the SLD experiment at SLAC, we have measured the vector/ (vector+pseudoscalar) production ratio, V/(V + P), for the prompt charmed mesons, D*+ and D+ Using the channels D*+ ~ D“n$ , Do + Ii–T+, and Do _ li-–T~n–T~ , as well as D+ ~ Ii’– T~T– , we f ind V/(V + P) = 0.61 + 0.09( .stat.) + 0.03(BR), which disfavors the expectation of 0.75 from naive spin-counti...
متن کاملNew Analysis of Cumulant Moments in e+e− Collisions by SLD Collaboration by Truncated Multiplicity Distributions
Newly reported normalized cumulant moments of charged particles in ee collisions by the SLD collaboration are analyzed by the truncated modified negative binomial distribution (MNBD) and the negative binomial distribution (NBD). Calculated result by the MNBD describes the oscillatory behavior of the data much better than that by the NBD. PACS number(s): 13.65.+i, 34.10.+x Normalized cumulant mo...
متن کاملCurrent Performance of the SLD VXD3
During 1996, the SLD collaboration completed construction and began operation of a new charge-coupled device (CCD) vertex detector (VXD3). Since then, its performance has been studied in detail and a new topological vertexing technique has been developed. In this paper, we discuss the design of VXD3, procedures for aligning it, and the tracking and vertexing improvements that have led to its wo...
متن کامل