Measurement of the e<sup>+</sup>e<sup>-</sup> → Z → bb forward-backward asymmetry and the B<sup>0</sup>B<sup>0</sup> mixing parameter using prompt leptons
The time-integrated <math><mtext>B</mtext><msup><mi></mi><mn>0</mn></msup><mtext>B</mtext><mtext>̄</mtext><msup><mi></mi><mn>0</mn></msup></math> mixing parameter and the forward-b...
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| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1999
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79977 |
| Aporte de: |
| Sumario: | The time-integrated <math><mtext>B</mtext><msup><mi></mi><mn>0</mn></msup><mtext>B</mtext><mtext>̄</mtext><msup><mi></mi><mn>0</mn></msup></math> mixing parameter and the forward-backward charge asymmetry in the process <math><mtext>e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→b</mtext><mtext>b</mtext><mtext>̄</mtext></math> are measured in hadronic Z events containing prompt muons or electrons, collected by the L3 experiment in the years 1990 to 1995. The total sample of 3.3 milion hadronic Z events with a mean centre-of-mass energy of 91.26 GeV yields: A<sup>b</sup><sub>FB</sub>=0.0960±0.0066(stat.)±0.0033(sys.), χ<sub>b</sub>=0.1192±0.0068(stat.)±0.0051(sys.). This asymmetry measurement together with measurements at energies away from the Z pole energy yield a pole asymmetry and corresponding effective electroweak mixing angle of: A<sup>0,b</sup><sub>FB</sub>=0.1015±0.0064(stat.)±0.0035(sys.), <math><mtext>sin</mtext><msup><mi></mi><mn>2</mn></msup><mtext>θ</mtext><mtext>̄</mtext><msub><mi></mi><mn><mtext>W</mtext></mn></msub><mtext>=0.2318±0.0013</mtext></math>. |
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