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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:6077974
 [1];  [2];  [3]; ; ; ; ; ; ;  [4]; ; ; ;  [5]; ; ; ;  [6]; ; more »; ; ; ; ; ;  [7]; ;  [8]; ; ; ; ;  [9] « less
  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 (Un
+ 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:
6077974
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 83:17; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

662310 -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662380* -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BEAMS
BEAUTY PARTICLES
BOSONS
C QUARKS
CHARM PARTICLES
DECAY
ELECTRON BEAMS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
INVARIANCE PRINCIPLES
LEPTON BEAMS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MUONS
P INVARIANCE
PARITY
PARTICLE BEAMS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
QUARKS
SEMILEPTONIC DECAY
STANFORD LINEAR COLLIDER DETECTOR
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS