O sistema está realizando uma manutenção regular. Resultados de buscas podem variar durante o processo.

Show simple item record

dc.contributor.authorFichet, Sylvain [UNESP]
dc.contributor.authorMoreau, Gregory
dc.identifier.citationNuclear Physics B. Amsterdam: Elsevier Science Bv, v. 905, p. 391-446, 2016.
dc.description.abstractThe studies of the Higgs boson couplings based on the recent and upcoming LHC data open up a new window on physics beyond the Standard Model. In this paper, we propose a statistical guide to the consistent treatment of the theoretical uncertainties entering the Higgs rate fits. Both the Bayesian and frequentist approaches are systematically analysed in a unified formalism. We present analytical expressions for the marginal likelihoods, useful to implement simultaneously the experimental and theoretical uncertainties. We review the various origins of the theoretical errors (QCD, EFT, PDF, production mode contamination ...). All these individual uncertainties are thoroughly combined with the help of moment-based considerations. The theoretical correlations among Higgs detection channels appear to affect the location and size of the best-fit regions in the space of Higgs couplings. We discuss the recurrent question of the shape of the prior distributions for the individual theoretical errors and find that a nearly Gaussian prior arises from the error combinations. We also develop the bias approach, which is an alternative to marginalisation providing more conservative results. The statistical framework to apply the bias principle is introduced and two realisations of the bias are proposed. Finally, depending on the statistical treatment, the Standard Model prediction for the Higgs signal strengths is found to lie within either the 68% or 95% confidence level region obtained from the latest analyses of the 7 and 8 TeV LHC datasets.en
dc.description.sponsorshipBrazilian Ministry of Science, Technology and Innovation
dc.description.sponsorshipInstitut Universitaire de France
dc.description.sponsorshipEuropean ERC Grant Higgs@LHC
dc.description.sponsorshipEuropean Union FP7 ITN INVISIBLES (Marie Curie Actions)
dc.publisherElsevier B.V.
dc.relation.ispartofNuclear Physics B
dc.sourceWeb of Science
dc.titleAnatomy of the Higgs fits: A first guide to statistical treatments of the theoretical uncertaintiesen
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniv Fed Rio Grande do Norte
dc.contributor.institutionUniv Paris 11
dc.description.affiliationSao Paulo State Univ, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, Sao Paulo, Brazil
dc.description.affiliationUniv Fed Rio Grande do Norte, Int Inst Phys, Av Odilon Gomes Lima 1722, BR-59078400 Natal, RN, Brazil
dc.description.affiliationUniv Paris 11, CNRS, Phys Theor Lab, Bat 210, F-91405 Orsay, France
dc.description.affiliationUnespSao Paulo State Univ, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, Sao Paulo, Brazil
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdEuropean Union FP7 ITN INVISIBLES (Marie Curie Actions): PITN-GA-2011-289442
Localize o texto completo

Files in this item


This item appears in the following Collection(s)

Show simple item record