Repository logo
 
Publication

Probing the CP nature of the Higgs coupling in tth events at the LHC

2017-07-17Journal article Restricted access
Simple item page
dc.contributor.authordos Santos, S. Amor
dc.contributor.authorFiolhais, M. C. N.
dc.contributor.authorFrederix, R.
dc.contributor.authorGoncalo, R.
dc.contributor.authorGouveia, E.
dc.contributor.authorMartins, R.
dc.contributor.authorOnofre, A.
dc.contributor.authorPease, C. M.
dc.contributor.authorPeixoto, H.
dc.contributor.authorReigoto, A.
dc.contributor.authordos Santos, Rui Alberto
dc.contributor.authorSilva, J.
dc.date.accessioned2017-11-27T11:48:00Z
dc.date.available2017-11-27T11:48:00Z
dc.date.issued2017-07-17
dc.description.abstractThe determination of the CP nature of the Higgs coupling to top quarks is addressed in this paper, using tt _ h events produced in pffisffiffi 13 TeV proton- proton collisions at the LHC. Dileptonic final states are employed, with two oppositely charged leptons and four jets, corresponding to the decays t. bW_. bl_.l, _ t. _ bW-. _ bl- _.l, and h. b _ b. Pure scalar ( h H), pure pseudoscalar ( h A), and CP- violating Higgs boson signal events, generated with MADGRAPH5_ AMC@ NLO, are fully reconstructed through a kinematic fit. We furthermore generate samples that have both a CP- even and a CP- odd component in the t _ th coupling in order to probe the ratio of the two components. New angular distributions of the decay products, as well as CP angular asymmetries, are explored in order to separate the scalar from the pseudoscalar components of the Higgs boson and reduce the contribution from the dominant irreducible background, t _ tb _ b. Significant differences between the angular distributions and asymmetries are observed, even after the full kinematic fit reconstruction of the events, allowing to define the best observables for a global fit of the Higgs couplings parameters.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDOS SANTOS, S. Amor [et al] - Probing the CP nature of the Higgs coupling in tth events at the LHC. Physical Review D. ISSN 2470-0010. Vol 96, N.º 1 (2017), pp. 1-19pt_PT
dc.identifier.doi10.1103/PhysRevD.96.013004pt_PT
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.urihttp://hdl.handle.net/10400.21/7588
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Physical Societypt_PT
dc.relation.publisherversionhttps://arxiv.org/pdf/1704.03565.pdfpt_PT
dc.subjectTop-Quark Pairpt_PT
dc.subjectAtlas Detectorpt_PT
dc.subjectMassless Particlespt_PT
dc.subjectBroken Symmetriespt_PT
dc.subjectBoson Productionpt_PT
dc.subjectMadanalysis 5pt_PT
dc.subjectFinal-Statespt_PT
dc.subject8 Tevpt_PT
dc.subjectCollisionspt_PT
dc.subjectSearchpt_PT
dc.titleProbing the CP nature of the Higgs coupling in tth events at the LHCpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titlePhysical Review Dpt_PT
oaire.citation.volume96pt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Probing the CP nature_R.Santos_ADF.pdf
Size:
2.81 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Física - Artigos