45 research outputs found
Search for high-mass Wγ and Zγ resonances using hadronic W/Z boson decays from 139 fb<sup> −1</sup> of pp collisions at √s = 13 TeV with the ATLAS detector
No full textA search for high-mass charged and neutral bosons decaying to Wγ and Zγ final states is presented in this paper. The analysis uses a data sample of s = 13 TeV proton-proton collisions with an integrated luminosity of 139 fb −1 collected by the ATLAS detector during LHC Run 2 operation. The sensitivity of the search is determined using models of the production and decay of spin-1 charged bosons and spin-0/2 neutral bosons. The range of resonance masses explored extends from 1.0 TeV to 6.8 TeV. At these high resonance masses, it is beneficial to target the hadronic decays of the W and Z bosons because of their large branching fractions. The decay products of the high-momentum W/Z bosons are strongly collimated and boosted-boson tagging techniques are employed to improve the sensitivity. No evidence of a signal above the Standard Model backgrounds is observed, and upper limits on the production cross-sections of these bosons times their branching fractions to Wγ and Zγ are derived for various boson production models. [Figure not available: see fulltext.].NSF -National Science Foundation(IN2P3-CNRS)info:eu-repo/semantics/publishedVersio
Search for flavour-changing neutral-current interactions of a top quark and a gluon in pp collisions at √s=13 TeV with the ATLAS detector
No full textA search is presented for the production of a single top quark via left-handed flavour-changing neutral-current (FCNC) interactions of a top quark, a gluon and an up or charm quark. Two production processes are considered: u+ g→ t and c+ g→ t. The analysis is based on proton–proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. The data set corresponds to an integrated luminosity of 139 fb- 1. Events with exactly one electron or muon, exactly one b-tagged jet and missing transverse momentum are selected, resembling the decay products of a singly produced top quark. Neural networks based on kinematic variables differentiate between events from the two signal processes and events from background processes. The measured data are consistent with the background-only hypothesis, and limits are set on the production cross-sections of the signal processes: σ(u+g→t)×B(t→Wb)×B(W→ℓν)<3.0pb and σ(c+g→t)×B(t→Wb)×B(W→ℓν)<4.7pb at the 95% confidence level, with B(W→ ℓν) = 0.325 being the sum of branching ratios of all three leptonic decay modes of the W boson. Based on the framework of an effective field theory, the cross-section limits are translated into limits on the strengths of the tug and tcg couplings occurring in the theory: |CuGut|/Λ2<0.057TeV- 2 and |CuGct|/Λ2<0.14TeV- 2. These bounds correspond to limits on the branching ratios of FCNC-induced top-quark decays: B(t→ u+ g) < 0.61 × 10 - 4 and B(t→ c+ g) < 3.7 × 10 - 4. © 2022, The Author(s).SCOAP 3 - Sponsoring Consortium for Open Access Publishing in Particle Physics;
CERN, for the benefit of the ATLAS collaboration 202
Higgs self-coupling (mainly non-resonant di-Higgs)
No full textConstraints on the Higgs self-coupling measured by the ATLAS colaboration (mainly non-resonant di-Higgs)
Atlas Digital del Plan GAM 2013
No full textProyecto de Graduación (Licenciatura en Ingeniería Forestal) Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Forestal, 2014.In 2012 a colaboration process between ONU-Habitat, Technological Institute of Costa Rica, the Ministry of Housing and Human Settlements and the National Institute of Housing and Urban Development, was oficıalızed under he cordination of Secretariat of Urban Development Plan (SPNDU) the initiative called Plan GAM 2013. To consolidate the proposals and objectives to achieve this plan was necessary to generate a GIS tool able to analyze and visualize the technical content of the planning and zoning, to achıeve this objective, software and hardware available in the SPNDU and the National Center for High Technology (CeNAT) was used, also a methodology that included the compilation and diagnosis of existing information, the creation of a data dictionary, standardization of cartographic elements, metadata development and the generation of new layers. The result of this approach was a simple database, accessible, easy to use with the potential to replicate, which was incorporated into a digital atlas with 83 maps and 172 layers of geographic information. The use of this digital atlas allowed an efficient analyze of the situation at the greater metropolitan area.Instituto Tecnológico de Costa Rica; CeNAT-PRIAS
Digital Atlas of GAM 2013 Plan
No full textEn 2012, en un proceso de colaboración entre la ONU-Hábitat, el Instituto Tecnológico de Costa Rica, el Ministerio de Vivienda y Asentamientos Humanos y el Instituto Nacional de Vivienda y Urbanismo, se oficializó la iniciativa denominada Plan GAM 2013, coordinada por la Secretaría del Plan Nacional de Desarrollo Urbano (SPNDU). Para consolidar las propuestas y alcanzar los objetivos de este plan fue necesario generar un instrumento de información geográfica capaz de analizar y visualizar los contenidos técnicos del proceso de planificación y ordenamiento territorial. Para ello se utilizó el equipo de software y hardware disponible en la SPNDU y en el Centro Nacional de Alta Tecnología (CeNAT). Además se aplicó una metodología que incluyó los procesos de recopilación y el diagnóstico de la información existente, la creación de un diccionario de datos, la estandarización de los elementos cartográficos, la elaboración de metadatos y la generación de nuevas capas. El resultado de esta metodología fue una base de datos simple, accesible, de fácil manejo y con posibilidades de ser replicada, que se constituyó en un atlas digital con 83 mapas y 172 capas de información geográfica. El uso de este atlas digital permitió analizar de manera eficiente la situación de la Gran Área Metropolitana (GAM), Costa Rica. In 2012 a colaboration process between ONU-Habitat, Technological Institute of Costa Rica, the Ministry of Housing and Human Settlements and the National Institute of Housing and Urban Development, was oficıalızed under he cordination of Secretariat of Urban Development Plan (SPNDU) the initiative called Plan GAM 2013. To consolidate the proposals and objectives to achieve this plan was necessary to generate a GIS tool able to analyze and visualize the technical content of the planning and zoning, to achıeve this objective, software and hardware available in the SPNDU and the National Center for High Technology (CeNAT) was used, also a methodology that included the compilation and diagnosis of existing information, the creation of a data dictionary, standardization of cartographic elements, metadata development and the generation of new layers. The result of this approach was a simple database, accessible, easy to use with the potential to replicate, which was incorporated into a digital atlas with 83 maps and 172 layers of geographic information. The use of this digital atlas allowed an efficient analyze of the situation at the greater metropolitan area in Costa Rica.
Atlas Digital del Plan GAM 2013
No full textIn 2012 a colaboration process between ONU-Habitat, Technological Institute of Costa Rica, the Ministry of Housing and Human Settlements and the National Institute of Housing and Urban Development, was oficıalızed under he cordination of Secretariat of Urban Development Plan (SPNDU) the initiative called Plan GAM 2013. To consolidate the proposals and objectives to achieve this plan was necessary to generate a GIS tool able to analyze and visualize the technical content of the planning and zoning, to achıeve this objective, software and hardware available in the SPNDU and the National Center for High Technology (CeNAT) was used, also a methodology that included the compilation and diagnosis of existing information, the creation of a data dictionary, standardization of cartographic elements, metadata development and the generation of new layers. The result of this approach was a simple database, accessible, easy to use with the potential to replicate, which was incorporated into a digital atlas with 83 maps and 172 layers of geographic information. The use of this digital atlas allowed an efficient analyze of the situation at the greater metropolitan area in Costa Rica. En 2012, en un proceso de colaboración entre la ONU-Hábitat, el Instituto Tecnológico de Costa Rica, el Ministerio de Vivienda y Asentamientos Humanos y el Instituto Nacional de Vivienda y Urbanismo, se oficializó la iniciativa denominada Plan GAM 2013, coordinada por la Secretaría del Plan Nacional de Desarrollo Urbano (SPNDU). Para consolidar las propuestas y alcanzar los objetivos de este plan fue necesario generar un instrumento de información geográfica capaz de analizar y visualizar los contenidos técnicos del proceso de planificación y ordenamiento territorial. Para ello se utilizó el equipo de software y hardware disponible en la SPNDU y en el Centro Nacional de Alta Tecnología (CeNAT). Además se aplicó una metodología que incluyó los procesos de recopilación y el diagnóstico de la información existente, la creación de un diccionario de datos, la estandarización de los elementos cartográficos, la elaboración de metadatos y la generación de nuevas capas. El resultado de esta metodología fue una base de datos simple, accesible, de fácil manejo y con posibilidades de ser replicada, que se constituyó en un atlas digital con 83 mapas y 172 capas de información geográfica. El uso de este atlas digital permitió analizar de manera eficiente la situación de la Gran Área Metropolitana (GAM), Costa Rica.
Measurement of Quarkonium Production in Proton-Lead and Proton- Proton Collisions at 5.02 TeV with the ATLAS Detector
No full textThe modification of the production of J/ψ, ψ(2S), and Υ(nS) (n = 1, 2, 3) in p+Pb collisions with respect to their production in pp collisions has been studied. The p+Pb and pp datasets used in this paper correspond to integrated luminosities of 28 nb⁻¹ and 25 pb⁻¹ respectively, collected in 2013 and 2015 by the ATLAS detector at the LHC, both at a centre-of-mass energy per nucleon pair of 5.02 TeV. The quarkonium states are reconstructed in the dimuon decay channel. The yields of J/ψ and ψ(2S) are separated into prompt and non- prompt sources. The measured quarkonium differential cross sections are presented as a function of rapidity and transverse momentum, as is the nuclear modification factor, R_{pPb} for J/ψ and Υ(nS). No significant modification of the J/ψ production is observed while Υ(nS) production is found to be suppressed at low transverse momentum in p+Pb collisions relative to pp collisions. The production of excited charmonium and bottomonium states is found to be suppressed relative to that of the ground states in central p+Pb collisions.School of Natural Sciences and Mathematic
O treinamento industrial e a gerencia de riscos - uma proposta de instrução programada
No full textDissertação (mestrado) - Universidade Feeral de Santa Catarina, Centro TecnologicoO aumento dos riscos industriais, proveniente da utilização de tecnologias mais avançadas e complexas, maior número de insumos, utilização de novos produtos, transporte e armazenagem de grandes quantidades de produtos perigosos, etc., vem desencadeando pressões sociais para que as empresas adotem medidas de emergência e de contenção de riscos eficientes. Neste sentido, a decisão das empresas em alocar recursos para a mitigação de perdas fundamenta-se no cotejo entre a adoção ou não, total ou parcial, das medidas preconizadas pela Gerência de Riscos. Além da influência social, os danos provenientes da ocorrência de eventos indesejáveis atuam diretamente na qualidade e nos resultados da ocorrência, o que muitas vezes justifica a conveniência econômica de sua implementação. Desta forma, a preocupação com riscos em plantas industriais é atualmente parte integrante da filosofia de modernização empregada por empresas que procuram qualificar seus serviços de forma a aumentar sua competitividade, agregando qualidade e confiabilidade a seus produtos e atentando tanto para fatores internos quanto externos aos domínios da empresa. Este trabalho busca contribuir para o aperfeiçoamento operacional das empresas, apresentando um meio de melhorar sua segurança e qualificar o seu quadro funcional através da aplicação de uma técnica de análise de riscos industriais e da utilização dos resultados obtidos como base de conhecimento de um sistema de instrução programada para ser utilizado em treinamento técnico-operacional de funcionários
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Search for first generation scalar leptoquarks in pp collisions at vs = 7 TeV with the ATLAS detector
No full textWe report a search for first generation scalar leptoquarks using 1.03 fb-1 of proton–proton collisions data produced by the Large Hadron Collider at vs = 7 TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses mL Q < 660 (607) GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5). © 2012 CERN. Published by Elsevier B.V. All rights reserved
A Database for Research on British Late Glacial
No full textThis briefly outlines the nature and structure of a database for recording data on British Late Glacial (Palaeolithic) archaeological sites built by the author for recording data on British Late-Glacial and Post-Glacial (Long Blade and Mesolithic sites). This Database builds upon the Central Pennine Mesolithic Sites Database, a recent Colaboration on the Creswellian and the framework created by the Lithoscapes Referential Framework Model and the Analytical Lithics Module
