Search for Higgs boson decays to a photon and a Z boson in pp collisions at √s = 7 and 8 TeV with the ATLAS detector
A search is reported for a neutral Higgs boson in the decay channel H → Zγ, Z → ℓ+ℓ- (ℓ = e,μ), using 4.5 fb<sup>-1</sup> of pp collisions at √s = 7TeV and 20.3 fb<sup>-1</sup> of pp collisions at √s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. T...
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| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2014
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/80365 |
| Aporte de: |
| Sumario: | A search is reported for a neutral Higgs boson in the decay channel H → Zγ, Z → ℓ+ℓ- (ℓ = e,μ), using 4.5 fb<sup>-1</sup> of pp collisions at √s = 7TeV and 20.3 fb<sup>-1</sup> of pp collisions at √s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m<sub>ℓℓγ</sub> , is consistent with the Standard Model hypothesis in the investigated mass range of 120–150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120–150 GeV between 0.13 and 0.5 pb for √s = 8 TeV at 95% confidence level. |
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