Measurement of the ZZ production cross section in proton-proton collisions at √s = 8 TeV using the ZZ → ℓ<sup>−</sup>ℓ<sup>+</sup>ℓ′<sup>−</sup>ℓ′<sup>+</sup> and ZZ→ ℓ<sup>−</sup>ℓ<sup>+</sup>νν¯ decay channels with the ATLAS detector
A measurement of the ZZ production cross section in the ℓ<sup>−</sup>ℓ<sup>+</sup>ℓ′<sup>−</sup>ℓ′<sup>+</sup> and ℓ<sup>−</sup>ℓ<sup>+</sup>νν¯ channels (ℓ = e, μ) in proton-proton collisions at √s = 8 TeV at the Large Hadron C...
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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/10915/87670 |
| Aporte de: |
| Sumario: | A measurement of the ZZ production cross section in the ℓ<sup>−</sup>ℓ<sup>+</sup>ℓ′<sup>−</sup>ℓ′<sup>+</sup> and ℓ<sup>−</sup>ℓ<sup>+</sup>νν¯ channels (ℓ = e, μ) in proton-proton collisions at √s = 8 TeV at the Large Hadron Collider at CERN, using data corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> collected by the ATLAS experiment in 2012 is presented. The fiducial cross sections for ZZ → ℓ<sup>−</sup>ℓ<sup>+</sup>ℓ′<sup>−</sup>ℓ′<sup>+</sup> and ZZ→ ℓ<sup>−</sup>ℓ<sup>+</sup>νν¯ are measured in selected phase-space regions. The total cross section for ZZ events produced with both Z bosons in the mass range 66 to 116 GeV is measured from the combination of the two channels to be 7.3 ± 0.4(stat) ± 0.3(syst)<sup>-0.2</sup><sub>-0.1</sub> (lumi) pb, which is consistent with the Standard Model prediction of 6. 6<sup>+0.7</sup><sub>-0.6</sub> pb. The differential cross sections in bins of various kinematic variables are presented. The differential event yield as a function of the transverse momentum of the leading Z boson is used to set limits on anomalous neutral triple gauge boson couplings in ZZ production. |
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