Repository logo
 
Publication

Observation and measurement of Higgs boson decays to WW$^*$ with the ATLAS detector

2015-07-16Journal article Open access
Simple item page
dc.contributor.authorATLAS collaboration (2877 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T05:36:36Z
dc.date.available2019-02-04T05:36:36Z
dc.date.issued2015-07-16
dc.date.updated2019-02-04T05:36:36Z
dc.description.abstractWe report the observation of Higgs boson decays to WW* based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of 25  fb−1 from s=7 and 8 TeV pp collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is 1.09-0.15+0.16(stat)-0.14+0.17(syst). The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are 1.02±0.19(stat)-0.18+0.22(syst) and 1.27-0.40+0.44(stat)-0.21+0.30(syst), respectively. At s=8  TeV, the total production cross sections are measured to be σ(gg→H→WW*)=4.6±0.9(stat)-0.7+0.8(syst)  pb and σ(VBF  H→WW*)=0.51-0.15+0.17(stat)-0.08+0.13(syst)  pb. The fiducial cross section is determined for the gluon-fusion process in exclusive final states with zero or one associated jet.
dc.description.versionPeer Reviewed
dc.identifierPhys.Rev. D92 (2015) 012006; DOI 10.1103/PhysRevD.92.012006
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevD.92.012006
dc.identifier.urihttp://hdl.handle.net/10400.26/26744
dc.language.isoeng
dc.titleObservation and measurement of Higgs boson decays to WW$^*$ with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1.pdf
Size:
2.48 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.85 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

LIP - AP - Física de Partículas e Astropartículas