Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at √s = 13 TeV with the ATLAS detector
A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb<sup>-1</sup> of √s = 13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significan...
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| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/82147 |
| Aporte de: |
| Sumario: | A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb<sup>-1</sup> of √s = 13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via ~t<sub>1</sub> → t(*) ~X<sup>0</sup><sub>1</sub> and ~t<sub>1</sub> → b~X<sup>±</sup><sub>1</sub> → bW(*) ~X<sup>0</sup><sub>1</sub>, where ~X<sup>0</sup><sub>1</sub> (~X<sup>±</sup><sub>1</sub>) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to t ~X<sup>0</sup><sub>1</sub>, top-squark masses in the range 450-1000 GeV are excluded for ~X<sup>0</sup><sub>1</sub> masses below 160 GeV. In the case where m<sub>~t<sub>1</sub></sub> ~ m<sub>t</sub> +m<sub>~X<sup>0</sup><sub>1</sub></sub> , top-squark masses in the range 235-590 GeV are excluded. |
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