Measurement of the forward backward asymmetry of c and b quarks at the Z pole using reconstructed D mesons
Collaboration
31 pages
Published in:
- Eur.Phys.J.C 10 (1999) 219-237
e-Print:
- hep-ex/9903074 [hep-ex]
PDG: CHARGE ASYMMETRY IN
Report number:
- CERN-EP-99-007,
- CERN-EP-99-07,
- CERN-EP-99-7
Experiments:
Citations per year
Abstract:
A measurement of the forward--backward asymmetry of and on the resonance is performed using about 3.5 million hadronic decays collected by the DELPHI detector at LEP in the years 1992 to 1995. The heavy quark is tagged by the exclusive reconstruction of several meson decay modes. The forward--backward asymmetries for and quarks at the resonance are determined to be: \renewcommand{\arraystretch}{1.6} \begin{array}{rcr@{}l} \Afbc(\sqrt{s} = 91.235 {\rm GeV}) &=& &0.0659 \pm 0.0094 (stat) \pm 0.0035 (syst) \Afbb (\sqrt{s} = 91.235 {\rm GeV}) &=& &0.0762 \pm 0.0194 (stat) \pm 0.0085 (syst) \Afbc(\sqrt{s} = 89.434 {\rm GeV}) &=&-&0.0496 \pm 0.0368 (stat) \pm 0.0053 (syst) \Afbb(\sqrt{s} = 89.434 {\rm GeV}) &=& &0.0567 \pm 0.0756 (stat) \pm 0.0117 (syst) \Afbc(\sqrt{s} = 92.990 {\rm GeV}) &=& &0.1180 \pm 0.0318 (stat) \pm 0.0062 (syst) \Afbb(\sqrt{s} = 92.990 {\rm GeV}) &=& &0.0882 \pm 0.0633 (stat) \pm 0.0122 (syst) \end{array} The combination of these results leads to an effective electroweak mixing angle of: SINEFF = 0.2332 \pm 0.0016- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- charm
- bottom
- quark: pair production
- particle identification: flavor
- charmed meson: particle identification
- angular distribution: asymmetry
References(16)
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