The Sld Collaboration
ثبت نشده
چکیده
We present a direct measurements of the Z 0-lepton coupling asymmetries, A e , A , and A. It is based on a data sample selected from 170k Z 0 decays collected by the SLD detector. The Z's are produced by collisions of polarized e , with unpolarized e + bunches at SLC. The couplings are extracted from the measurement of the left-right forward-backward asymmetry for each lepton species. The preliminary results using information from all leptonic data for
منابع مشابه
New 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 کاملJ an 1 99 8 SLAC - PUB - 7709 December 1 , 1997 Measurements of Hadronic Asymmetries in e + e − Collisions at LEP and SLD 1
High precision experimental new electroweak results measured at the four LEP experiments and the SLD collaboration are discussed. Heavy quark (bb and cc) forward-backward asymmetries measured at LEP are presented along with polarized forward-backward and left-right asymmetries measured at SLD. The results are compared, and the combined averages are used to evaluate the Standard Model parameters.
متن کاملMeasurement of a C with Charmed Mesons at Sld * the Sld Collaboration
We present a direct measurement of the parity-violation parameter A c. The measurement is based on 550k Z 0 decays collected by the SLD detector. The mean electron-beam polarization is |P e | = 73%. The tagging of c-quark events was performed using two methods: The exclusive reconstruction of D * + , D + , and D 0 mesons, and the inclusive P T spectrum of soft-pions (π s) in the decay of D * + ...
متن کاملPole Using a Lepton Tag * the Sld Collaboration
The parity violation parameters A b and A c of the Zbb and Zc¯ c couplings have been measured directly, using the polar angle dependence of the polarized cross sections at the Z 0 pole. Bottom and charmed hadrons were tagged via their semileptonic decays. Both the electron and muon analyses take advantage of new multivariate techniques to increase the analyzing power. Based on the 1993-98 SLD s...
متن کامل