[SLAC] [SLAC Pubs and Reports] SLAC-PUB-6641Measurement of alphas MZ2 from Hadronic Event Observables at the Z0 Resonance Abstract The strong coupling $\alpha_s(M_Z^2$) has been measured using hadronic decays of $Z^0$ bosons collected by the SLD experiment at SLAC. The data were compared with QCD predictions both at fixed order, O($\alpha_s^2$), and including resummed analytic formulae based on the next-to-leading logarithm approximation. In this comprehensive analysis we studied event shapes, jet rates, particle correlations, and angular energy flow, and checked the consistency between $\alpha_s(M_Z^2$) values extracted from these different measures. Combining all results we obtain $\alpha_s(M_Z^2$) = 0.1200 $\pm$ 0.0025(exp.) $\pm$ 0.0078(theor.), where the dominant uncertainty is from uncalculated higher order contributions. (Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.) Full Text PDF slac-pub-6641 (421 KB) Compressed PostScript slac-pub-6641 (1.10 MB) Alternate download methods: old, ancient* *download methods - technical info More Information Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database. Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department. Page generated 05 Jan 2006 @ 16:54 PST by htmlme.pl
The strong coupling $\alpha_s(M_Z^2$) has been measured using hadronic decays of $Z^0$ bosons collected by the SLD experiment at SLAC. The data were compared with QCD predictions both at fixed order, O($\alpha_s^2$), and including resummed analytic formulae based on the next-to-leading logarithm approximation. In this comprehensive analysis we studied event shapes, jet rates, particle correlations, and angular energy flow, and checked the consistency between $\alpha_s(M_Z^2$) values extracted from these different measures. Combining all results we obtain $\alpha_s(M_Z^2$) = 0.1200 $\pm$ 0.0025(exp.) $\pm$ 0.0078(theor.), where the dominant uncertainty is from uncalculated higher order contributions. (Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)
(Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)
PDF slac-pub-6641 (421 KB) Compressed PostScript slac-pub-6641 (1.10 MB) Alternate download methods: old, ancient* *download methods - technical info
Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.