Searches for exclusively produced W boson pairs in the process pp(γγ)→pW+W-p and an exclusively produced Higgs boson in the process pp(gg)→pHp have been performed using e±μ∓ final states. These measurements use 20.2 fb-1 of pp collisions collected by the ATLAS experiment at a center-of-mass energy √s = 8 TeV at the LHC. Exclusive production of W+W- consistent with the Standard Model prediction is found with 3.0σ significance. The exclusive W+W- production cross section is determined to be σ(γγ→W+W-→e±μ∓X) = 6.9 ± 2.2(stat) ± 1.4(sys) fb, in agreement with the Standard Model prediction. Limits on anomalous quartic gauge couplings are set at 95% confidence level as -1.7×10-6W0/Λ2<1.7×10-6 GeV-2 and -6.4×10-6WC/Λ2<6.3×10-6 GeV-2. A 95% confidence-level upper limit on the total production cross section for an exclusive Higgs boson is set to 1.2 pb.
Notes
La lista completa de autores que integran el documento puede consultarse en el archivo.
General information
Issue date:2016
Document language:English
Journal:Physical Review D; vol. 94, no. 3
Origin:Facultad de Ciencias Exactas; Instituto de Física La Plata