487 research outputs found

    Avaliação da cobertura vacinal de Febre Amarela e Sarampo em Curitiba, no período de 2008 a 2019

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    Objetivo: Avaliar os números da vacinação contra o sarampo e a febre amarela na cidade de Curitiba, entre 2008 a 2019, levando em consideração surtos e campanhas ocorridos no período em questão.  Métodos: Estudo observacional ecológico, quantitativo, analítico e transversal, realizado através da coleta de dados de informações vacinais do setor de Epidemiologia da Secretaria Municipal de Saúde de Curitiba/PR. Resultados: Em relação ao sarampo, foram aplicadas 1.256.331 vacinas no período estudado, sendo que 718.725 correspondem à primeira dose e 537.606 ao reforço. Quanto à febre amarela, foram aplicadas 985.183 vacinas, sendo 976.231 correspondentes à primeira dose e 8.952 ao reforço. O ano de maior aplicação foi 2019, tanto contra o sarampo quanto à febre amarela, 199.087 e 430.797 doses, respectivamente. Conclusão: A vacinação contra o sarampo e  febre amarela na cidade de Curitiba entre 2008 e 2019 teve um aspecto crescente em número, especialmente nos dois últimos anos avaliados

    Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

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    Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

    Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at s=8TeV\sqrt{s}=8\,\mathrm TeV{} with the ATLAS detector

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    ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider

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    Search for single production of vector-like quarks decaying into Wb in pp collisions at s=8\sqrt{s} = 8 TeV with the ATLAS detector

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    Multiplicity dependence of light (anti-)nuclei production in p–Pb collisions at sNN=5.02 TeV

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    The measurement of the deuteron and anti-deuteron production in the rapidity range −1 < y < 0 as a function of transverse momentum and event multiplicity in p–Pb collisions at √sNN = 5.02 TeV is presented. (Anti-)deuterons are identified via their specific energy loss dE/dx and via their time-of- flight. Their production in p–Pb collisions is compared to pp and Pb–Pb collisions and is discussed within the context of thermal and coalescence models. The ratio of integrated yields of deuterons to protons (d/p) shows a significant increase as a function of the charged-particle multiplicity of the event starting from values similar to those observed in pp collisions at low multiplicities and approaching those observed in Pb–Pb collisions at high multiplicities. The mean transverse particle momenta are extracted from the deuteron spectra and the values are similar to those obtained for p and particles. Thus, deuteron spectra do not follow mass ordering. This behaviour is in contrast to the trend observed for non-composite particles in p–Pb collisions. In addition, the production of the rare 3He and 3He nuclei has been studied. The spectrum corresponding to all non-single diffractive p-Pb collisions is obtained in the rapidity window −1 < y < 0 and the pT-integrated yield dN/dy is extracted. It is found that the yields of protons, deuterons, and 3He, normalised by the spin degeneracy factor, follow an exponential decrease with mass number

    Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at sNN=2.76TeV\sqrt{s_{\rm{NN}}} = 2.76 TeV

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    This paper presents the first measurements of the charge independent (CI) and charge dependent (CD) two-particle transverse momentum correlators G2CI and G2CD in Pb–Pb collisions at sNN=2.76TeV by the ALICE collaboration. The two-particle transverse momentum correlator G2 was introduced as a measure of the momentum current transfer between neighboring system cells. The correlators are measured as a function of pair separation in pseudorapidity (Δ η ) and azimuth (Δ φ ) and as a function of collision centrality. From peripheral to central collisions, the correlator G2CI exhibits a longitudinal broadening while undergoing a monotonic azimuthal narrowing. By contrast, G2CD exhibits a narrowing along both dimensions. These features are not reproduced by models such as HIJING and AMPT. However, the observed narrowing of the correlators from peripheral to central collisions is expected to result from the stronger transverse flow profiles produced in more central collisions and the longitudinal broadening is predicted to be sensitive to momentum currents and the shear viscosity per unit of entropy density η/s of the matter produced in the collisions. The observed broadening is found to be consistent with the hypothesized lower bound of η/s and is in qualitative agreement with values obtained from anisotropic flow measurements.This paper presents the first measurements of the charge independent (CI) and charge dependent (CD) two-particle transverse momentum correlators G2CIG_{2}^{\rm CI} and G2CDG_{2}^{\rm CD} in Pb--Pb collisions at \sqrt{s_{\text{NN}}} = 2.76\;\text{\TeVe} by the ALICE collaboration. The two-particle transverse momentum correlator G2G_{2} was introduced as a measure of the momentum current transfer between neighbouring system cells. The correlators are measured as a function of pair separation in pseudorapidity (Δη\Delta \eta) and azimuth (Δφ\Delta \varphi) and as a function of collision centrality. From peripheral to central collisions, the correlator G2CIG_{2}^{\rm CI} exhibits a longitudinal broadening while undergoing a monotonic azimuthal narrowing. By contrast, G2CDG_{2}^{\rm CD} exhibits a narrowing along both dimensions. These features are not reproduced by models such as HIJING and AMPT. However, the observed narrowing of the correlators from peripheral to central collisions is expected to result from the stronger transverse flow profiles produced in more central collisions and the longitudinal broadening is predicted to be sensitive to momentum currents and the shear viscosity per unit of entropy density η/s\eta/s of the matter produced in the collisions. The observed broadening is found to be consistent with the hypothesized lower bound of η/s\eta/s and is in qualitative agreement with values obtained from anisotropic flow measurements

    Inclusive J/ψ\psi production in Xe–Xe collisions at sNN\sqrt{s_{\rm NN}} = 5.44 TeV

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    Inclusive J/ψ\psi production is studied in Xe-Xe interactions at a centre-of-mass energy per nucleon pair of sNN=5.44\sqrt{s_{\rm NN}}= 5.44 TeV, using the ALICE detector at the CERN LHC. The J/ψ\psi meson is reconstructed via its decay into a muon pair, in the centre-of-mass rapidity interval 2.5<y<42.5<y<4 and down to zero transverse momentum. In this Letter, the nuclear modification factors RAAR_{\rm AA} for inclusive J/ψ\psi, measured in the centrality range 0-90% as well as in the centrality intervals 0-20% and 20-90% are presented. The RAAR_{\rm AA} values are compared to previously published results for Pb-Pb collisions at sNN=5.02\sqrt{s_{\rm NN}}= 5.02 TeV and to the calculation of a transport model. A good agreement is found between Xe-Xe and Pb-Pb results as well as between data and the model

    Real-time data processing in the ALICE High Level Trigger at the LHC

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    International audienceAt the Large Hadron Collider at CERN in Geneva, Switzerland, atomic nuclei are collided at ultra-relativistic energies. Many final-state particles are produced in each collision and their properties are measured by the ALICE detector. The detector signals induced by the produced particles are digitized leading to data rates that are in excess of 48 GB/s. The ALICE High Level Trigger (HLT) system pioneered the use of FPGA- and GPU-based algorithms to reconstruct charged-particle trajectories and reduce the data size in real time. The results of the reconstruction of the collision events, available online, are used for high level data quality and detector-performance monitoring and real-time time-dependent detector calibration. The online data compression techniques developed and used in the ALICE HLT have more than quadrupled the amount of data that can be stored for offline event processing
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