Majorana Higgses at colliders
Abstract Collider signals of heavy Majorana neutrino mass origin are studied in the minimal Left-Right symmetric model, where their mass is generated spontaneously together with the breaking of lepton number. The right-handed triplet Higgs boson Δ, responsible for such breaking, can be copiously pro...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-04-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP04(2017)114 |
| _version_ | 1828498395103232000 |
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| author | Miha Nemevšek Fabrizio Nesti Juan Carlos Vasquez |
| author_facet | Miha Nemevšek Fabrizio Nesti Juan Carlos Vasquez |
| author_sort | Miha Nemevšek |
| collection | DOAJ |
| description | Abstract Collider signals of heavy Majorana neutrino mass origin are studied in the minimal Left-Right symmetric model, where their mass is generated spontaneously together with the breaking of lepton number. The right-handed triplet Higgs boson Δ, responsible for such breaking, can be copiously produced at the LHC through the Higgs portal in the gluon fusion and less so in gauge mediated channels. At Δ masses below the opening of the V V decay channel, the two observable modes are pair-production of heavy neutrinos via the triplet gluon fusion gg → Δ → NN and pair production of triplets from the Higgs h → ΔΔ → 4N decay. The latter features tri- and quad same-sign lepton final states that break lepton number by four units and have no significant background. In both cases up to four displaced vertices may be present and their displacement may serve as a discriminating variable. The backgrounds at the LHC, including the jet fake rate, are estimated and the resulting sensitivity to the Left-Right breaking scale extends well beyond 10 TeV. In addition, sub-dominant radiative modes are surveyed: the γγ, Zγ and lepton flavour violating ones. Finally, prospects for Δ signals at future e + e − colliders are presented. |
| first_indexed | 2024-12-11T13:06:19Z |
| format | Article |
| id | doaj.art-6f6f4842ac40463082af99c0596fcb03 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-11T13:06:19Z |
| publishDate | 2017-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-6f6f4842ac40463082af99c0596fcb032022-12-22T01:06:19ZengSpringerOpenJournal of High Energy Physics1029-84792017-04-012017413410.1007/JHEP04(2017)114Majorana Higgses at collidersMiha Nemevšek0Fabrizio Nesti1Juan Carlos Vasquez2Jožef Stefan InstituteDipartimento di Fisica, Sezione di Fisica teorica, Università di TriesteCentro Científico Tecnológico de Valparaíso-CCTVal, Universidad Técnica Federico Santa MarıaAbstract Collider signals of heavy Majorana neutrino mass origin are studied in the minimal Left-Right symmetric model, where their mass is generated spontaneously together with the breaking of lepton number. The right-handed triplet Higgs boson Δ, responsible for such breaking, can be copiously produced at the LHC through the Higgs portal in the gluon fusion and less so in gauge mediated channels. At Δ masses below the opening of the V V decay channel, the two observable modes are pair-production of heavy neutrinos via the triplet gluon fusion gg → Δ → NN and pair production of triplets from the Higgs h → ΔΔ → 4N decay. The latter features tri- and quad same-sign lepton final states that break lepton number by four units and have no significant background. In both cases up to four displaced vertices may be present and their displacement may serve as a discriminating variable. The backgrounds at the LHC, including the jet fake rate, are estimated and the resulting sensitivity to the Left-Right breaking scale extends well beyond 10 TeV. In addition, sub-dominant radiative modes are surveyed: the γγ, Zγ and lepton flavour violating ones. Finally, prospects for Δ signals at future e + e − colliders are presented.http://link.springer.com/article/10.1007/JHEP04(2017)114Beyond Standard ModelHiggs PhysicsNeutrino Physics |
| spellingShingle | Miha Nemevšek Fabrizio Nesti Juan Carlos Vasquez Majorana Higgses at colliders Journal of High Energy Physics Beyond Standard Model Higgs Physics Neutrino Physics |
| title | Majorana Higgses at colliders |
| title_full | Majorana Higgses at colliders |
| title_fullStr | Majorana Higgses at colliders |
| title_full_unstemmed | Majorana Higgses at colliders |
| title_short | Majorana Higgses at colliders |
| title_sort | majorana higgses at colliders |
| topic | Beyond Standard Model Higgs Physics Neutrino Physics |
| url | http://link.springer.com/article/10.1007/JHEP04(2017)114 |
| work_keys_str_mv | AT mihanemevsek majoranahiggsesatcolliders AT fabrizionesti majoranahiggsesatcolliders AT juancarlosvasquez majoranahiggsesatcolliders |