Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet
We present an experimental search of supersymmetry (SUSY) in compressed mass spectra scenarios with scalar taus, using data from proton-proton (pp) collisions in the Large Hadron Collider, LHC, at CERN laboratory, at E=13 TeV, collected by the CMS experiment in 2016 and 2017. Compressed mass spectra...
- Autores:
-
Segura Delgado, Manuel Alejandro
- Tipo de recurso:
- Doctoral thesis
- Fecha de publicación:
- 2019
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/41263
- Acceso en línea:
- http://hdl.handle.net/1992/41263
- Palabra clave:
- Supersimetría - Investigaciones
Neutrinos - Investigaciones
Partículas (Física nuclear) - Investigaciones
Leptones (Física nuclear) - Investigaciones
Gran Colisionador de Hadrones (Francia y Suiza) - Experimentos - Investigaciones
Física
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
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| dc.title.es_CO.fl_str_mv |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| title |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| spellingShingle |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet Supersimetría - Investigaciones Neutrinos - Investigaciones Partículas (Física nuclear) - Investigaciones Leptones (Física nuclear) - Investigaciones Gran Colisionador de Hadrones (Francia y Suiza) - Experimentos - Investigaciones Física |
| title_short |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| title_full |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| title_fullStr |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| title_full_unstemmed |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| title_sort |
Search for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jet |
| dc.creator.fl_str_mv |
Segura Delgado, Manuel Alejandro |
| dc.contributor.advisor.none.fl_str_mv |
Flórez Bustos, Carlos Andrés |
| dc.contributor.author.none.fl_str_mv |
Segura Delgado, Manuel Alejandro |
| dc.contributor.jury.none.fl_str_mv |
Gurrola, Alfredo Buchmuller, Oliver Gómez Moreno, Bernardo |
| dc.subject.armarc.es_CO.fl_str_mv |
Supersimetría - Investigaciones Neutrinos - Investigaciones Partículas (Física nuclear) - Investigaciones Leptones (Física nuclear) - Investigaciones Gran Colisionador de Hadrones (Francia y Suiza) - Experimentos - Investigaciones |
| topic |
Supersimetría - Investigaciones Neutrinos - Investigaciones Partículas (Física nuclear) - Investigaciones Leptones (Física nuclear) - Investigaciones Gran Colisionador de Hadrones (Francia y Suiza) - Experimentos - Investigaciones Física |
| dc.subject.themes.none.fl_str_mv |
Física |
| description |
We present an experimental search of supersymmetry (SUSY) in compressed mass spectra scenarios with scalar taus, using data from proton-proton (pp) collisions in the Large Hadron Collider, LHC, at CERN laboratory, at E=13 TeV, collected by the CMS experiment in 2016 and 2017. Compressed mass spectra scenarios, where the mass difference between the lightest neutralino and the stau is small, have been proposed in several models in order to incorporate coannihilation as a mechanism to obtain a relic dark matter density consistent with that predicted by astronomy. The compressed mass region in SUSY is challenging to probe experimentally. We focus on a final state containing exactly one tau lepton, with low transverse momentum, that has decayed hadronically, at least one initial state radiation jet (ISR) with high momentum, and a large imbalance of missing transverse momentum. An integrated luminosity of 77.2 fb-1 of pp data was used for this analysis. The data was found to be in agreement with respect to the expected background. Therefore, upper limits on the production cross-section as function of chargino mass were set, excluding masses up to 290 GeV for a mass splitting of delta m(stau-neutralino) = 50 GeV. The limits set on this search, constitute the most stringent limits today for all stau's related searches. |
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2019 |
| dc.date.issued.none.fl_str_mv |
2019 |
| dc.date.accessioned.none.fl_str_mv |
2020-09-03T08:12:47Z |
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2020-09-03T08:12:47Z |
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Trabajo de grado - Doctorado |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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info:eu-repo/semantics/doctoralThesis |
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http://purl.org/coar/resource_type/c_db06 |
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Text |
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http://purl.org/redcol/resource_type/TD |
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http://purl.org/coar/resource_type/c_db06 |
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http://hdl.handle.net/1992/41263 |
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u830355.pdf |
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instname:Universidad de los Andes |
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reponame:Repositorio Institucional Séneca |
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repourl:https://repositorio.uniandes.edu.co/ |
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http://hdl.handle.net/1992/41263 |
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u830355.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
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eng |
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eng |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ |
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info:eu-repo/semantics/openAccess |
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openAccess |
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188 hojas |
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application/pdf |
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Uniandes |
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Doctorado en Ciencias - Física |
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Facultad de Ciencias |
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Departamento de Física |
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Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Flórez Bustos, Carlos Andrésvirtual::14639-1Segura Delgado, Manuel Alejandro25803500Gurrola, AlfredoBuchmuller, OliverGómez Moreno, Bernardo2020-09-03T08:12:47Z2020-09-03T08:12:47Z2019http://hdl.handle.net/1992/41263u830355.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/We present an experimental search of supersymmetry (SUSY) in compressed mass spectra scenarios with scalar taus, using data from proton-proton (pp) collisions in the Large Hadron Collider, LHC, at CERN laboratory, at E=13 TeV, collected by the CMS experiment in 2016 and 2017. Compressed mass spectra scenarios, where the mass difference between the lightest neutralino and the stau is small, have been proposed in several models in order to incorporate coannihilation as a mechanism to obtain a relic dark matter density consistent with that predicted by astronomy. The compressed mass region in SUSY is challenging to probe experimentally. We focus on a final state containing exactly one tau lepton, with low transverse momentum, that has decayed hadronically, at least one initial state radiation jet (ISR) with high momentum, and a large imbalance of missing transverse momentum. An integrated luminosity of 77.2 fb-1 of pp data was used for this analysis. The data was found to be in agreement with respect to the expected background. Therefore, upper limits on the production cross-section as function of chargino mass were set, excluding masses up to 290 GeV for a mass splitting of delta m(stau-neutralino) = 50 GeV. The limits set on this search, constitute the most stringent limits today for all stau's related searches.Presentamos una búsqueda experimental de supersimetría (SUSY) en escenarios de espectros comprimidos de masa con taus escalares, usando datos de colisiones protón-protón (pp) en el gran colisionador de hadrones, LHC, del laboratorio CERN, E=13 TeV, colectados por el experimento CMS en 2016 y 2017. Los escenarios de espectros comprimidos de masa, donde la diferencia de masa entre el neutralino más ligero y el stau es pequeña, han sido propuesto por varios modelos con el fin de incorporar coaniquilación como mecanismo para obtener una densidad de reliquia de materia oscura consistente con el valor estimado usando mediciones astronómicas. Es un reto probar la región comprimida de masas en SUSY experimentalmente. Nos enfocamos en estados finales que contienen exactamente un leptón tau, con bajo momento transversal, que decae hadronicamente, al menos un jet de radiación de estado inicial (ISR) con alto momento y un gran imbalance de momento transverso faltante. Una luminosidad integrada de 77.2 fb-1 de datos pp fue usada para este análisis. Los datos concuerdan con los eventos esperados del modelo estándar. Por lo tanto, se establecen límites superiores en la sección eficaz de producción como función de la masa del chargino, excluyendo masas hasta 290 GeV para una diferencia de masas de delta m(stau-neutralino) = 50 GeV. Los resultados obtenidos de este análisis, constituyen hoy los limites más rigurosos para todas las búsquedas relacionadas con stau's hasta el momento.Doctor en Ciencias - FísicaDoctorado188 hojasapplication/pdfengUniandesDoctorado en Ciencias - FísicaFacultad de CienciasDepartamento de Físicainstname:Universidad de los Andesreponame:Repositorio Institucional SénecaSearch for compressed supersymmetry at the LHC in final states with one hadronic tau and one energetic jetTrabajo de grado - Doctoradoinfo:eu-repo/semantics/doctoralThesishttp://purl.org/coar/resource_type/c_db06http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TDSupersimetría - InvestigacionesNeutrinos - InvestigacionesPartículas (Física nuclear) - InvestigacionesLeptones (Física nuclear) - InvestigacionesGran Colisionador de Hadrones (Francia y Suiza) - Experimentos - InvestigacionesFísicaPublicationhttps://scholar.google.es/citations?user=SUG6ga0AAAAJvirtual::14639-10000-0002-3222-0249virtual::14639-1https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001541878virtual::14639-136748a10-0a15-454e-8153-6373f14be738virtual::14639-136748a10-0a15-454e-8153-6373f14be738virtual::14639-1THUMBNAILu830355.pdf.jpgu830355.pdf.jpgIM Thumbnailimage/jpeg12840https://repositorio.uniandes.edu.co/bitstreams/35e5f5d5-d5ee-4f9b-81ba-befa3c4834e7/download3b1990aaa133a1122bbf61c865fd494eMD55ORIGINALu830355.pdfapplication/pdf11143011https://repositorio.uniandes.edu.co/bitstreams/e2eff386-0842-4bd2-a52b-2f1b41131e20/download0e7d8c520adcf93935c860ab2b125380MD51TEXTu830355.pdf.txtu830355.pdf.txtExtracted texttext/plain335733https://repositorio.uniandes.edu.co/bitstreams/afd4691c-c07c-42f7-9c64-d95499c5c569/download2214c4bc2bcb0e3406d33474c80c3a7bMD541992/41263oai:repositorio.uniandes.edu.co:1992/412632024-03-13 15:15:11.148http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co |