Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP
The measurements of <math><mtext>R</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=σ(</mtext><mtext>e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</...
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| Formato: | Articulo |
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2000
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/75660 |
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I19-R120-10915-75660 |
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dspace |
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Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas bb production forward-backward asymmetry centre-of-mass energies Física |
| spellingShingle |
Ciencias Exactas bb production forward-backward asymmetry centre-of-mass energies Física Dova, María Teresa L3 Collaboration Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| topic_facet |
Ciencias Exactas bb production forward-backward asymmetry centre-of-mass energies Física |
| description |
The measurements of <math><mtext>R</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=σ(</mtext><mtext>e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→</mtext><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext><mtext>)/σ(</mtext><mtext>e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→</mtext><mtext>q</mtext><mtext>q</mtext><mtext>̄</mtext><mtext>)</mtext></math> and of the b quark forward–backward charge asymmetry, Abfb, at centre-of-mass energies above the Z pole are described. The measurement of Rb is performed at 's between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. The measurement of Ab is fb performed using the large statistics event sample collected at 's s189 GeV with a lepton-tag analysis based on the selection ' b of prompt muons and electrons. The results at s =189 GeV are <math><mtext>R</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=0.163±0.013</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat.)</mtext><mtext>±0.005</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst.)</mtext></math>, <math><mtext>A</mtext><msub><mi></mi><mn><mtext>fb</mtext></mn></msub><msup><mi></mi><mn><mtext>b</mtext></mn></msup><mtext>=0.61±0.18</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat.)</mtext><mtext>±0.09</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst.)</mtext></math> |
| format |
Articulo Articulo |
| author |
Dova, María Teresa L3 Collaboration |
| author_facet |
Dova, María Teresa L3 Collaboration |
| author_sort |
Dova, María Teresa |
| title |
Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| title_short |
Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| title_full |
Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| title_fullStr |
Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| title_full_unstemmed |
Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP |
| title_sort |
measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the z pole at lep |
| publishDate |
2000 |
| url |
http://sedici.unlp.edu.ar/handle/10915/75660 |
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AT dovamariateresa measurementsofthemathmtextbmtextmtextbmtextmtextmtextmathproductioncrosssectionandforwardbackwardasymmetryatcentreofmassenergiesabovethezpoleatlep AT l3collaboration measurementsofthemathmtextbmtextmtextbmtextmtextmtextmathproductioncrosssectionandforwardbackwardasymmetryatcentreofmassenergiesabovethezpoleatlep |
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Repositorios |
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