Publicação
Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector
| Resumo: | The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb(-1) of integrated luminosity from proton-proton collisions at root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark (t) over tilde and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay (t) over tilde -> b (chi) over tilde (+/-)(1) into a b-quark and the lightest chargino with (chi) over tilde (+/-)(1) W (chi) over tilde (0)(1),the decay (t) over tilde -> t (chi) over tilde (0)(1) into an on-shell top quark and the lightest neutralino, the three-body decay (t) over tilde -> bW (chi) over tilde (0)(1) and the four-body decay (t) over tilde -> bl nu(chi) over tilde (0)(1). No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the (t) over tilde and (chi) over tilde (0)(1) masses. The results exclude at 95% confidence level (t) over tilde masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches. |
|---|---|
| Autores principais: | Onofre, A. |
| Outros Autores: | Castro, Nuno Filipe; ATLAS Collaboration |
| Assunto: | Ciências Naturais::Ciências Físicas |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1867439140515086336 |
|---|---|
| author | Onofre, A. |
| author2 | Castro, Nuno Filipe ATLAS Collaboration |
| author2_role | author author |
| author_facet | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Onofre, A.\"},{\"Person.name\":\"Castro, Nuno Filipe\"},{\"Person.name\":\"ATLAS Collaboration\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
| datacite.date.Accepted.fl_str_mv | 2017-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2018-12-31T01:58:27Z |
| datacite.date.embargoed.fl_str_mv | 2018-12-31T01:58:27Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Ciências Naturais::Ciências Físicas |
| datacite.titles.title.fl_str_mv | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
| dc.date.Accepted.fl_str_mv | 2017-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2018-12-31T01:58:27Z |
| dc.date.embargoed.fl_str_mv | 2018-12-31T01:58:27Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/57661 |
| 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 | Ciências Naturais::Ciências Físicas |
| dc.title.fl_str_mv | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb(-1) of integrated luminosity from proton-proton collisions at root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark (t) over tilde and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay (t) over tilde -> b (chi) over tilde (+/-)(1) into a b-quark and the lightest chargino with (chi) over tilde (+/-)(1) W (chi) over tilde (0)(1),the decay (t) over tilde -> t (chi) over tilde (0)(1) into an on-shell top quark and the lightest neutralino, the three-body decay (t) over tilde -> bW (chi) over tilde (0)(1) and the four-body decay (t) over tilde -> bl nu(chi) over tilde (0)(1). No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the (t) over tilde and (chi) over tilde (0)(1) masses. The results exclude at 95% confidence level (t) over tilde masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/4e38766b-da5e-4b5a-b60f-2123d1be9f77/download |
| id | rum_bb4ee96700a7afe62d708e124f3db454 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/57661 |
| 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:1822/57661 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
| publishDate | 2017 |
| 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 VerlagporThe results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb(-1) of integrated luminosity from proton-proton collisions at root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark (t) over tilde and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay (t) over tilde -> b (chi) over tilde (+/-)(1) into a b-quark and the lightest chargino with (chi) over tilde (+/-)(1) W (chi) over tilde (0)(1),the decay (t) over tilde -> t (chi) over tilde (0)(1) into an on-shell top quark and the lightest neutralino, the three-body decay (t) over tilde -> bW (chi) over tilde (0)(1) and the four-body decay (t) over tilde -> bl nu(chi) over tilde (0)(1). No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the (t) over tilde and (chi) over tilde (0)(1) masses. The results exclude at 95% confidence level (t) over tilde masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches.application/pdfporSearch for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detectorOnofre, A.Castro, Nuno FilipeATLAS CollaborationHostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf1434-6044EISSNIsPartOf1434-6052DOIIsPartOf10.1140/epjc/s10052-017-5445-x2018-12-31T01:58:27Z20172017-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/57661http://purl.org/coar/access_right/c_abf2open accesshttp://www.oecd.org/science/inno/38235147.pdfFields of Science and Technology (FOS)Ciências Naturais::Ciências Físicas2419071 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorium.uminho.pt/bitstreams/4e38766b-da5e-4b5a-b60f-2123d1be9f77/download |
| spellingShingle | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector Onofre, A. Ciências Naturais::Ciências Físicas |
| status | SINGLETON |
| subject.other.fl_str_mv | Ciências Naturais::Ciências Físicas |
| title | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| title_full | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| title_fullStr | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| title_full_unstemmed | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| title_short | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| title_sort | Search for direct top squark pair production in final states with two leptons in root s=13 TeV pp collisions with the ATLAS detector |
| topic | Ciências Naturais::Ciências Físicas |
| topic_facet | Ciências Naturais::Ciências Físicas |
| url | https://hdl.handle.net/1822/57661 |
| visible | 1 |