Summary
The test of the Standard Model through the measurements of Z0 to fermion couplings can benefit from much enhanced sensitivity by using longitudinally polarized electron beams. This paper reviews preliminary electroweak measurements from SLD on heavy-quark production at the Z0, using 150 000 hadronic Z0 decays accumulated during the 1993–1995 runs with high electron beam polarization. The parity-violating parametersA b andA c of the Zbb and Zcc couplings are measured directly from the left-right forward-backward asymmetries. A measurement ofR b with a lifetime double tag and a summary of the preliminary measurement ofA LR from the 1993–1995 SLD data are also included in this report.
Similar content being viewed by others
References
SLDCollaboration (K. Abe et al.),Phys. Rev. Lett.,73 (1994) 25.
Olchevski A., talk presented at theInternational Euro-Physics Conference on High Energy Physics, Brussels, July, 1995.
SLDCollaboration (K. Abe et al.), contribution (EPS0222) to theInternational Euro-Physics Conference on High Energy Physics, Brussels, July, 1995.
ALEPHCollaboration (D. Buskulic et al.),Phys. Lett. B,313 (1993) 535.
SLDCollaboration (K. Abe et al.),Phys. Rev. D,53 (1996) 1023.
Djouadi A., Kühn J. andZerwas P.,Z. Phys. C,46 (1990) 411;Altarelli G. andLampe B.,Nucl. Phys.,391 (1993) 3;Stav J. B. andOlsen H. A., private communication.
SLDCollaboration (K. Abe et al.),Phys. Rev. Lett.,75 (1995) 3609.
SLDCollaboration (K. Abe et al.),Phys. Rev. Lett.,74 (1995) 2895.
Isgur N., Scora D., Grinstein B. andWise M. B.,Phys. Rev. D,39 (1989) 799; Code provided by P. Kim and CLEO Collaboration.
SLDCollaboration (K. Abe et al.), contribution (EPS0250) to theInternational Euro-Physics Conference on High Energy Physics, Brussels, July, 1995.
SLDCollaboration (K. Abe et al.),Phys. Rev. Lett.,74 (1995) 2890.
SLDCollaboration (K. Abe et al.), contribution (EPS0251) to theInternational Euro-Physics Conference on High Energy Physics, Brussels, July, 1995.
Takeuchi T., Grant A. andRosner J., Fermilab-Conf-94/279-T, talk presented at theDPF ’94 Meeting, Albuquerque, N.M., August 1994.
Author information
Authors and Affiliations
Consortia
Additional information
Work supported in part by US Department of Energy contract DE-AC03-76SF00515.
Rights and permissions
About this article
Cite this article
SLD Collaboration. Production of charm and beauty in e+e− with polarized electron beams. Nuov Cim A 109, 663–673 (1996). https://doi.org/10.1007/BF02731700
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02731700