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dc.date.accessioned 2019-08-13T18:48:32Z
dc.date.available 2019-08-13T18:48:32Z
dc.date.issued 2015-11-30
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/79059
dc.description.abstract The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb-1 of pp collision data at √s = 7TeV and 20.3 fb-1 at √s = 8TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the γγ, ZZ, WW, Zγ, bb, ττ, and μμ decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. Limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the γγ and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of mA > 370 GeV in the "hMSSM" simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z → ℓℓ, W/Z → jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. The use of the measured visible decay rates in a more general coupling t improves the upper limit to 0.23, constraining a Higgs portal model of dark matter. en
dc.format.extent 52 p. es
dc.language en es
dc.subject supersymmetry es
dc.subject hadron-hadron scattering es
dc.subject Higgs physics es
dc.subject dark matter es
dc.title Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector en
dc.type Articulo es
sedici.identifier.doi 10.1007/JHEP11(2015)206
sedici.identifier.issn 1029-8479 es
sedici.creator.person Alconada Verzini, María Josefina es
sedici.creator.person Alonso, Francisco es
sedici.creator.person Arduh, Francisco Anuar es
sedici.creator.person Dova, Maria Teresa es
sedici.creator.person Monticelli, Fernando Gabriel es
sedici.creator.person Wahlberg, Hernán Pablo es
sedici.creator.person The ATLAS Collaboration es
sedici.subject.materias Ciencias Exactas es
sedici.subject.materias Física es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Exactas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution 4.0 International (CC BY 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Journal of High Energy Physics es
sedici.relation.journalVolumeAndIssue vol. 2015, no. 11 es

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Creative Commons Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0)