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Direct Measurement of A{sub b} and A{sub c} at the Z{sup 0} Pole Using a Lepton Tag

Journal Article · · Physical Review Letters
OSTI ID:698927
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  1. Adelphi University, Garden City, New York 11530 (United States)
  2. Aomori University, Aomori, 030 (Japan)
  3. INFN Sezione di Bologna, I-40126 Bologna (Italy)
  4. Brunel University, Uxbridge, Middlesex UB8 3PH (United Kingdom)
  5. Boston University, Boston, Massachusetts 02215 (United States)
  6. University of Cincinnati, Cincinnati, Ohio 45221 (United States)
  7. University of Colorado, Boulder, Colorado 80309 (United States)
  8. Columbia University, New York, New York 10533 (United States)
  9. Colorado State University, Ft. Collins, Colorado 80523 (United States)
  10. INFN Sezione di Ferrara and Universita di Ferrara, I-44100 Ferrara (Italy)
  11. INFN Laboratori Nazionali di Frascati, I-00044 Frascati (Italy)
  12. University of Illinois, Urbana, Illinois 61801 (United States)
  13. Johns Hopkins University, Baltimore, Maryland 21153 (United States)
  14. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)
  15. Louisiana Technical University, Ruston, Louisiana 71272 (United States)
  16. University of Massachusetts, Amherst, Massachusetts 01003 (United States)
  17. University of Mississippi, (United States)
+ Show Author Affiliations

The parity violation parameters A{sub b} and A{sub c} of the Zb{ovr b} and Zc{ovr c} couplings have been measured directly, using the polar angle dependence of the Z{sup 0} -pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron identification algorithms take advantage of new multivariate techniques, incorporating for the first time information from the SLD {hacek C}erenkov Ring Imaging Detector. Based on the 1993{endash}1995 SLD sample of 150thinsp000 Z{sup 0} decays produced with highly polarized electron beams, we measure A{sub b}=0.910{plus_minus}0.068(stat) {plus_minus}0.037(syst) , A{sub c}=0.642{plus_minus}0.110(stat) {plus_minus}0.063(syst) . {copyright} {ital 1999} {ital The American Physical Society }

OSTI ID:
698927
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

66 PHYSICS
B QUARKS
C QUARKS
ELECTRON BEAMS
ELECTRON-POSITRON INTERACTIONS
MUONS
P INVARIANCE
PARITY
PARTICLE DECAY
QUARKS
SEMILEPTONIC DECAY
STANFORD LINEAR COLLIDER DETECTOR
Z NEUTRAL BOSONS