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Measurement of exclusive γγ →w+W- production and search for exclusive Higgs boson production in pp collisions at s =8 TeV using the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
Rekke forfattare: 28602016 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 94, nr 3, artikkel-id 032011Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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±μX)=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<a0W/Λ2<1.7×10-6 GeV-2 and -6.4×10-6<aCW/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.

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2016. Vol. 94, nr 3, artikkel-id 032011
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URN: urn:nbn:se:kth:diva-195579DOI: 10.1103/PhysRevD.94.032011ISI: 000383046500001Scopus ID: 2-s2.0-84989282845OAI: oai:DiVA.org:kth-195579DiVA, id: diva2:1044395
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QC 20161103

Tilgjengelig fra: 2016-11-03 Laget: 2016-11-03 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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