Searches for scalar top and scalar bottom quarks in e+e- interactions at 161 GeV ≤ √s ≤ 183 GeV
Searches for scalar top and scalar bottom quarks have been performed at center-of-mass energies between 161 GeV and 183 GeV using the L3 detector at LEP. No signal is observed. Model-independent limits on production cross sections are determined for the two decay channels <math><mtext>t&...
Guardado en:
| 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/10915/78042 |
| Aporte de: |
| Sumario: | Searches for scalar top and scalar bottom quarks have been performed at center-of-mass energies between 161 GeV and 183 GeV using the L3 detector at LEP. No signal is observed. Model-independent limits on production cross sections are determined for the two decay channels <math><mtext>t</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub></math>→c<math><mtext>χ</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub><msup><mi></mi><mn>0</mn></msup></math> and <math><mtext>b</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub></math>→b<math><mtext>χ</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub><msup><mi></mi><mn>0</mn></msup></math>. Within the framework of the Minimal Supersymmetric extension of the Standard Model mass limits are derived. For mass differences between <math><mtext>t</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub></math> and <math><mtext>χ</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub><msup><mi></mi><mn>0</mn></msup></math> greater than 10 GeV a 95% C.L. limit of 81.5 GeV is set on the mass of the Supersymmetric partner of the left-handed top. A supersymmetric partner of the left-handed bottom with a mass below 80 GeV is excluded at 95% C.L. if the mass difference between <math><mtext>b</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub></math> and <math><mtext>χ</mtext><mtext>̃</mtext><msub><mi></mi><mn>1</mn></msub><msup><mi></mi><mn>0</mn></msup></math> is greater than 20 GeV. |
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