916 research outputs found

    Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

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    A measurement of the cosmic-ray spectrum for energies exceeding 4×10184{\times}10^{18} eV is presented, which is based on the analysis of showers with zenith angles greater than 60∘60^{\circ} detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10185.3{\times}10^{18} eV, the "ankle", the flux can be described by a power law E−γE^{-\gamma} with index Îł=2.70±0.02 (stat)±0.1 (sys)\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)} followed by a smooth suppression region. For the energy (EsE_\text{s}) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es=(5.12±0.25 (stat)−1.2+1.0 (sys))×1019E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19} eV.Comment: Replaced with published version. Added journal reference and DO

    DesafĂ­os en la re-construcciĂłn de las prĂĄcticas pre-profesionales en contexto de pandemia

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    El Programa de PrĂĄcticas Preprofesionales de la Facultad de PsicologĂ­a UNC, es una modalidad de egreso, que brinda prĂĄcticas intensivas e integradoras, que articulan el mundo acadĂ©mico con el mundo del trabajo. Las prĂĄcticas constituyen actividades de capacitaciĂłn y entrenamiento en tĂ©cnicas, instrumentos y herramientas, desde diferentes enfoques teĂłricos y en distintos contextos y ĂĄreas de ejercicio del psicĂłlogo, con el asesoramiento, supervisiĂłn y seguimiento continuo del equipo docente para facilitar el aprendizaje del que hacer profesional. En el contexto de pandemia, todos los involucrados asumimos el compromiso de adecuar las actividades mencionadas a entornos virtuales, con el doble propĂłsito de: por un lado, sostener el vĂ­nculo con la comunidad, colaborando en la co-creaciĂłn de alternativas; y, por otro garantizar el trĂĄnsito de los estudiantes por una experiencia significativa de aprendizaje, en contacto con las condiciones del terreno, en las que hoy se desarrolla el quehacer del psicĂłlogo. En este marco, surgieron desafĂ­os como: reducir la distancia entre las expectativas y las posibilidades, mantener la motivaciĂłn, habilitar mĂșltiples canales de comunicaciĂłn y contacto, reconocer mĂșltiples recursos en contraste con las dificultades de accesibilidad, entre otras. En el presente Simposio, se comparten las diversas formas en que cada Contexto ha repensado la labor de formaciĂłn de futuros graduados para atravesar situaciones criticas. FormaciĂłn de futuros psicĂłlogos en Contextos JurĂ­dicos nuevos escenarios de acompañamiento psicoeducativo del Contexto Educativo. Tejiendo en las redes sociales y virtuales emociones en la virtualizaciĂłn de las prĂĄcticas del Contexto Organizacional y del Trabajo. RecuperaciĂłn de prĂĄcticas y trayectorias del Contexto Social-Comunitario. Creando formas alternativas de sistematizaciĂłn. RecreaciĂłn de dispositivos de formaciĂłn de practicantes del Contexto Salud y Sanitarista. Se pretende evidenciar los procesos de construcciĂłn de conocimientos colectivos en condiciones complejas, posibilitados y enriquecidos a travĂ©s de la solidaridad y el diĂĄlogo entre los diferentes actores involucrados.Fil: LĂłpez, Adriana. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: DemarĂ­a, Mariela Lorena. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: BeltrĂĄn, Mariana. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: DĂ­az, InĂ©s. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Blanc, Federico. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Ferrer, Carmen Cecilia. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Mierez, Silvia. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Scorza, Diana. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Aybar, Ariel. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Buffa, Silvina. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Rinaudo, Gustavo. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Carreras, Rafael. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Gigante, Constansa. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Ferrero, Dina Gricelda. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Wortley, Ana Carolina. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Wortley, Ana Carolina. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Servicio Cuidando a Quienes Cuidan: Servicio de ContenciĂłn Virtual para Efectores/as de la Salud, Docentes y No docentes; Argentina.Fil: Morales, Gabriela. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Bellido, Leandro Pablo. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Casih, Leandro NicolĂĄs. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: GĂłmez, Francisco Gustavo. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Sastre, MarĂ­a Constanza. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Grillo, Carla Simone. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina.Fil: Zupichiatti, Lara. Universidad Nacional de CĂłrdoba. Facultad de PsicologĂ­a. Programa de PrĂĄcticas Pre-Profesionales; Argentina

    Standalone vertex ïŹnding in the ATLAS muon spectrometer

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    A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011

    Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

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    Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H →γ Îł, H → Z Z∗ →4l and H →W W∗ →lÎœlÎœ. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined ïŹts probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson

    Measurement of the top quark pair cross section with ATLAS in pp collisions at √s=7 TeV using final states with an electron or a muon and a hadronically decaying τ lepton

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    A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb -1. Events with an isolated electron or muon and a τ lepton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, σtt-=186±13(stat.)±20(syst.)±7(lumi.) pb, is in good agreement with the Standard Model prediction

    Measurement of the top quark-pair production cross section with ATLAS in pp collisions at \sqrt{s}=7\TeV

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    A measurement of the production cross-section for top quark pairs(\ttbar) in pppp collisions at \sqrt{s}=7 \TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron ee or muon Ό\mu) with large missing transverse energy and at least four jets, and dilepton (eeee, ΌΌ\mu\mu or eΌe\mu) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb-1, 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-\ttbar Standard Model processes are estimated using data-driven methods and determined to be 12.2±3.912.2 \pm 3.9 events and 2.5±0.62.5 \pm 0.6 events, respectively. The kinematic properties of the selected events are consistent with SM \ttbar production. The inclusive top quark pair production cross-section is measured to be \sigmattbar=145 \pm 31 ^{+42}_{-27} pb where the first uncertainty is statistical and the second systematic. The measurement agrees with perturbative QCD calculations.Comment: 30 pages plus author list (50 pages total), 9 figures, 11 tables, CERN-PH number and final journal adde

    Hunt for new phenomena using large jet multiplicities and missing transverse momentum with ATLAS in 4.7 fb−1 of √s=7 TeV proton-proton collisions

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    Results are presented of a search for new particles decaying to large numbers of jets in association with missing transverse momentum, using 4.7 fb−1 of pp collision data at s√=7TeV collected by the ATLAS experiment at the Large Hadron Collider in 2011. The event selection requires missing transverse momentum, no isolated electrons or muons, and from ≄6 to ≄9 jets. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of a MSUGRA/CMSSM supersymmetric model, where, for large universal scalar mass m 0, gluino masses smaller than 840 GeV are excluded at the 95% confidence level, extending previously published limits. Within a simplified model containing only a gluino octet and a neutralino, gluino masses smaller than 870 GeV are similarly excluded for neutralino masses below 100 GeV

    Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

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    The production of tt‟ , W+bb‟ and W+cc‟ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓΜ , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of tt‟t\overline{t}, W+bb‟W+b\overline{b} and W+cc‟W+c\overline{c} is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 ±\pm 0.02 \mbox{fb}^{-1}. The WW bosons are reconstructed in the decays W→ℓΜW\rightarrow\ell\nu, where ℓ\ell denotes muon or electron, while the bb and cc quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions
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