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Improved direct measurement of the parity-violation parameter Ab using a mass tag and momentum-weighted track charge.
- Source :
-
Physical review letters [Phys Rev Lett] 2003 Apr 11; Vol. 90 (14), pp. 141804. Date of Electronic Publication: 2003 Apr 10. - Publication Year :
- 2003
-
Abstract
- We present an improved direct measurement of the parity-violation parameter A(b) in the Z boson-b-quark coupling using a self-calibrating track-charge technique applied to a sample enriched in Z-->bb events via the topological reconstruction of the B hadron mass. Manipulation of the Stanford Linear Collider electron-beam polarization permits the measurement of A(b) to be made independently of other Z-pole coupling parameters. From the 1996-1998 sample of 400,000 hadronic Z decays, produced with an average beam polarization of 73.4%, we find A(b)=0.906+/-0.022(stat)+/-0.023(syst).
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 90
- Issue :
- 14
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 12731908
- Full Text :
- https://doi.org/10.1103/PhysRevLett.90.141804