Articulo
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
Registro en:
issn:1126-6708
Autor
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Institución
Resumen
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. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Exactas Instituto de Física La Plata