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Mass-degenerate Higgs bosons at 125 GeV in the two-Higgs-doublet model

2013-03-12Journal article Open access
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dc.contributor.authorFerreira, P. M.
dc.contributor.authorSantos, Rui
dc.contributor.authorHaber, Howard
dc.contributor.authorSilva, João P.
dc.date.accessioned2013-10-26T19:32:00Z
dc.date.available2013-10-26T19:32:00Z
dc.date.issued2013-03-12
dc.description.abstractThe analysis of the Higgs boson data by the ATLAS and CMS Collaborations appears to exhibit an excess of h -> gamma gamma events above the Standard Model (SM) expectations, whereas no significant excess is observed in h -> ZZ* -> four lepton events, albeit with large statistical uncertainty due to the small data sample. These results (assuming they persist with further data) could be explained by a pair of nearly mass-degenerate scalars, one of which is an SM-like Higgs boson and the other is a scalar with suppressed couplings to W+W- and ZZ. In the two-Higgs-doublet model, the observed gamma gamma and ZZ* -> four lepton data can be reproduced by an approximately degenerate CP-even (h) and CP-odd (A) Higgs boson for values of sin (beta - alpha) near unity and 0: 70 less than or similar to tan beta less than or similar to 1. An enhanced gamma gamma signal can also arise in cases where m(h) similar or equal to m(H), m(H) similar or equal to m(A), or m(h) similar or equal to m(H) similar or equal to m(A). Since the ZZ* -> 4 leptons signal derives primarily from an SM-like Higgs boson whereas the gamma gamma signal receives contributions from two (or more) nearly mass-degenerate states, one would expect a slightly different invariant mass peak in the ZZ* -> four lepton and gamma gamma channels. The phenomenological consequences of such models can be tested with additional Higgs data that will be collected at the LHC in the near future. DOI: 10.1103/PhysRevD.87.055009.por
dc.identifier.citationFERREIRA, P. M.; SANTOS, Rui; HABER, Howard E.; SILVA, João P. - Mass-degenerate Higgs bosons at 125 GeV in the two-Higgs-doublet model. Physical Review D. ISSN 1550-7998. Vol. 87, nr 5 (2013).por
dc.identifier.issn1550-7998
dc.identifier.other10.1103/PhysRevD.87.055009
dc.identifier.urihttp://hdl.handle.net/10400.21/2797
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAmer Physical Socpor
dc.relation.ispartofseries;055009
dc.subjectStandard Modelpor
dc.subjectDoublet Modelpor
dc.subjectElectroweak Fitpor
dc.subjectLHCpor
dc.subjectSearchpor
dc.titleMass-degenerate Higgs bosons at 125 GeV in the two-Higgs-doublet modelpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceUSApor
oaire.citation.issue5por
oaire.citation.titlePhysical Review Dpor
oaire.citation.volume87por
person.familyNameSantos
person.familyNameHaber
person.givenNameRui
person.givenNameHoward
person.identifier100360
person.identifier.ciencia-id5A1A-5794-6DC2
person.identifier.ciencia-id7110-4319-D229
person.identifier.orcid0000-0002-7948-0355
person.identifier.orcid0000-0001-7338-8104
person.identifier.ridF-1956-2010
person.identifier.scopus-author-id10739338800
person.identifier.scopus-author-id7005412317
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationf972a9bd-1bdd-4a47-8d1e-94e9595eddc0
relation.isAuthorOfPublication434f58d9-4ca6-43dc-9bf3-ce04f308f145
relation.isAuthorOfPublication.latestForDiscoveryf972a9bd-1bdd-4a47-8d1e-94e9595eddc0

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