ATLAS CollaborationAaboud, M.Aad, G.Abbott, B.Abdallah, J.Abdinov, O.Royon, Christophe2017-11-222017-11-222016-08-31Aaboud, M., Aad, G., Abbott, B. et al. Phys. Rev. D (2016) 94: https://doi.org/10.1103/PhysRevD.94.032011https://hdl.handle.net/1808/25457Searches 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 −1.7×10−6<aW0/Λ2<1.7× 10−6 GeV−2 and −6.4×10−6<aWC/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.© 2016 CERN, for the ATLAS Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.http://creativecommons.org/licenses/by/3.0/Particle InteractionsHadron collidersArticle10.1103/PhysRevD.94.032011openAccess