Publicação
Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector
| Resumo: | A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at s√=8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integrated luminosity of 20.3 fb−1. Events are required to have at least three selected lepton candidates, at least two of which must be electrons or muons, while the third may be a hadronically decaying tau. Selected events are categorized based on their lepton flavour content and signal regions are constructed using several kinematic variables of interest. No significant deviations from Standard Model predictions are observed. Model-independent upper limits on contributions from beyond the Standard Model phenomena are provided for each signal region, along with prescription to re-interpret the limits for any model. Constraints are also placed on models predicting doubly charged Higgs bosons and excited leptons. For doubly charged Higgs bosons decaying to eτ or μτ, lower limits on the mass are set at 400 GeV at 95% confidence level. For excited leptons, constraints are provided as functions of both the mass of the excited state and the compositeness scale Λ, with the strongest mass constraints arising in regions where the mass equals Λ. In such scenarios, lower mass limits are set at 3.0 TeV for excited electrons and muons, 2.5 TeV for excited taus, and 1.6 TeV for every excited-neutrino flavour. |
|---|---|
| Autores principais: | Onofre, A. |
| Outros Autores: | Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration |
| Assunto: | Hadron-Hadron Scattering |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1866270554239008768 |
|---|---|
| author | Onofre, A. |
| author2 | Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| author2_role | author author |
| author_facet | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| author_role | author |
| contributor_name_str_mv | Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Onofre, A.\"},{\"Person.name\":\"Castro, Nuno Filipe Silva Fernandes\"},{\"Person.name\":\"ATLAS Collaboration\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| datacite.date.Accepted.fl_str_mv | 2015-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2016-02-01T14:23:10Z |
| datacite.date.embargoed.fl_str_mv | 2016-02-01T14:23:10Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Hadron-Hadron Scattering |
| datacite.titles.title.fl_str_mv | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| dc.contributor.none.fl_str_mv | Universidade do Minho |
| dc.creator.none.fl_str_mv | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| dc.date.Accepted.fl_str_mv | 2015-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2016-02-01T14:23:10Z |
| dc.date.embargoed.fl_str_mv | 2016-02-01T14:23:10Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/39862 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Springer Verlag |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Hadron-Hadron Scattering |
| dc.title.fl_str_mv | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at s√=8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integrated luminosity of 20.3 fb−1. Events are required to have at least three selected lepton candidates, at least two of which must be electrons or muons, while the third may be a hadronically decaying tau. Selected events are categorized based on their lepton flavour content and signal regions are constructed using several kinematic variables of interest. No significant deviations from Standard Model predictions are observed. Model-independent upper limits on contributions from beyond the Standard Model phenomena are provided for each signal region, along with prescription to re-interpret the limits for any model. Constraints are also placed on models predicting doubly charged Higgs bosons and excited leptons. For doubly charged Higgs bosons decaying to eτ or μτ, lower limits on the mass are set at 400 GeV at 95% confidence level. For excited leptons, constraints are provided as functions of both the mass of the excited state and the compositeness scale Λ, with the strongest mass constraints arising in regions where the mass equals Λ. In such scenarios, lower mass limits are set at 3.0 TeV for excited electrons and muons, 2.5 TeV for excited taus, and 1.6 TeV for every excited-neutrino flavour. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://prod-dspace.uminho.pt/bitstreams/37365f58-fb6e-4c68-8de7-6685f0b91bdd/download |
| id | rum_1a1f0e81ca2ecf7f8e808595cd024339 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/39862 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/39862 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| publishDate | 2015 |
| publisher.none.fl_str_mv | Springer Verlag |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engSpringer VerlagporA generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at s√=8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integrated luminosity of 20.3 fb−1. Events are required to have at least three selected lepton candidates, at least two of which must be electrons or muons, while the third may be a hadronically decaying tau. Selected events are categorized based on their lepton flavour content and signal regions are constructed using several kinematic variables of interest. No significant deviations from Standard Model predictions are observed. Model-independent upper limits on contributions from beyond the Standard Model phenomena are provided for each signal region, along with prescription to re-interpret the limits for any model. Constraints are also placed on models predicting doubly charged Higgs bosons and excited leptons. For doubly charged Higgs bosons decaying to eτ or μτ, lower limits on the mass are set at 400 GeV at 95% confidence level. For excited leptons, constraints are provided as functions of both the mass of the excited state and the compositeness scale Λ, with the strongest mass constraints arising in regions where the mass equals Λ. In such scenarios, lower mass limits are set at 3.0 TeV for excited electrons and muons, 2.5 TeV for excited taus, and 1.6 TeV for every excited-neutrino flavour.application/pdfporSearch for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detectorOnofre, A.Castro, Nuno Filipe Silva FernandesATLAS CollaborationHostingInstitutionOrganizationalUniversidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf1029-8479DOIIsPartOf10.1007/jhep08(2015)1382016-02-01T14:23:10Z20152015-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/39862http://purl.org/coar/access_right/c_abf2open accessHadron-Hadron Scattering1023500 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://prod-dspace.uminho.pt/bitstreams/37365f58-fb6e-4c68-8de7-6685f0b91bdd/download |
| spellingShingle | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector Onofre, A. Hadron-Hadron Scattering |
| status | SINGLETON |
| subject.fl_str_mv | Hadron-Hadron Scattering |
| title | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| title_full | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| title_fullStr | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| title_full_unstemmed | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| title_short | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| title_sort | Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector |
| topic | Hadron-Hadron Scattering |
| topic_facet | Hadron-Hadron Scattering |
| url | https://hdl.handle.net/1822/39862 |
| visible | 1 |