40 research outputs found

    Measurement of prompt D0^{0} and D\overline{D}0^{0} meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at root SNN\sqrt{S_{NN}} = 5.02 TeV

    Get PDF
    The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapiditydependent difference (Av2) in the second Fourier coefficient of the azimuthal distribution (elliptic flow, v2) between D0 (uc) and D0 (uc) mesons. Motivated by the search for evidence of this field, the CMS detector at the LHC is used to perform the first measurement of Av2. The rapidity-averaged value is found to be (Av2) = 0.001 ? 0.001 (stat)? 0.003 (syst) in PbPb collisions at ?sNN = 5.02 TeV. In addition, the influence of the collision geometry is explored by measuring the D0 and D0mesons v2 and triangular flow coefficient (v3) as functions of rapidity, transverse momentum (pT), and event centrality (a measure of the overlap of the two Pb nuclei). A clear centrality dependence of prompt D0 meson v2 values is observed, while the v3 is largely independent of centrality. These trends are consistent with expectations of flow driven by the initial-state geometry. ? 2021 The Author. Published by Elsevier B.V. This is an open access article under the CC BY licens

    Measurement of the CP-violating phase ϕs_{s} in the B0^{0}s_{s}→J/ψ φ(1020) →μ⁺μ⁻K⁺K⁻ channel in proton-proton collisions at √s = 13 TeV

    Get PDF

    Observation of electroweak production of Wγ with two jets in proton-proton collisions at √s = 13 TeV

    Get PDF
    A first observation is presented for the electroweak production of a W boson, a photon, and two jets in proton-proton collisions. The W boson decays are selected by requiring one identified electron or muon and an imbalance in transverse momentum. The two jets are required to have a high dijet mass and a large separation in pseudorapidity. The measurement is based on data collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb1^{-1}. The observed (expected) significance for this process is 4.9 (4.6) standard deviations. After combining with previously reported CMS results at 8 TeV, the observed (expected) significance is 5.3 (4.8) standard deviations. The cross section for the electroweak Wγjj_{γjj} production in a restricted fiducial region is measured as 20.4 +/- 4.5 fb and the total cross section for Wγ_{γ} production in association with 2 jets in the same fiducial region is 108 +/- 16 fb. All results are in good agreement with recent theoretical predictions. Constraints are placed on anomalous quartic gauge couplings in terms of dimension-8 effective field theory operators

    Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at s=13 TeV

    Get PDF
    The first measurements of production cross sections of polarized same-sign W±W±boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 137fb−1. Events are selected by requiring exactly two same-sign leptons, electrons or muons, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass to enhance the contribution of same-sign W±W±scattering events. An observed (expected) 95% confidence level upper limit of 1.17 (0.88)fbis set on the production cross section for longitudinally polarized same-sign W±W±boson pairs. The electroweak production of same-sign W±W±boson pairs with at least one of the Wbosons longitudinally polarized is measured with an observed (expected) significance of 2.3 (3.1) standard deviations.SCOAP

    A procedure for monitoring the mean of autocorrelated industrial data

    No full text
    SIGLEAvailable from British Library Document Supply Centre- DSC:DX175882 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

    Pollen contamination in a maritime pine clonal seed orchard using microsatellites

    No full text
    Pollen contamination is a serious problem in seed orchards, which may reduce genetic gain considerably. High levels of pollen contamination can be reached even when the stands are isolated by several hundred of meters from natural populations. Recently, molecular markers have been used to trace details of reproductive processes. The efficiency and utility of estimating mating system, gene flow and pollen contamination are greatly increased by using microsatellite markers, which are ideal for parentage studies and fingerprinting, due to their high discrimination power. The aim of the present study was to estimate the pollen contamination in a clonal seed orchard (CSO). Three nuclear microsatellites were used to screen the 60 different clones from the CSO and the 206 seeds collected from 7 trees from each one of the three plots distributed according to the main winds direction. The 3 loci distinguished the 60 clones genotypes, but 2 pairs. Minimum and maximum estimates of pollen contamination were 46% and 56%, respectively. Those values could be explained by the presence of a P. pinaster stand at a distance lower than 2 Km and the existence of natural regeneration of this species on the orchard’s isolation zone. External plots pollen contamination was higher than in the inner plot. Only 20% of the clones contributed for the next generation, which may lead to a reduction of seeds’ genetic variability. However, an asymmetrical sampling from the orchard (3 plots) was made, which might have biased the results, and the effective number of clones participating in the next generation might be higher. The outcross pollination rate was found to be very high - 90.2%. The minimum estimate of biparental inbreeding was 21.2%, a not so high value if we consider the number of seeds sampled and the orchard size

    Optimality Analysis of the Two-Stage Algorithm for Hammerstein System Identification

    No full text
    The Two-Stage Algorithm (TSA) has been extensively used and adapted for the identification of Hammerstein systems. It is essentially based on a particular formulation of Hammerstein systems in the form of bilinearly parameterized linear regressions. This paper has been motivated by a somewhat contradictory fact: though the optimality of the TSA has been established by Bai in 1998 only in the case of some special weighting matrices, the unweighted TSA is usually used in practice. It is shown in this paper that the unweighted TSA indeed gives the optimal solution of the weighted nonlinear least-squares problem formulated with a particular weighting matrix. This provides a theoretical justification of the unweighted TSA, and leads to a generalization of the obtained result to the case of colored noise with noise whitening. Numerical examples of identification of Hammerstein systems are presented to validate the theoretical analysis.CADIC

    Race for Applicable Antimicrobial Dental Implant Surfaces to Fight Biofilm-Related Disease: Advancing in Laboratorial Studies vs Stagnation in Clinical Application

    No full text
    Across years, potential strategies to fight peri-implantitis have been notoriously explored through the antimicrobial coating implant surfaces capable of interfering with the bacterial adhesion process. However, although experimental studies have significantly advanced, no product has been marketed so far. For science to reach the society, the commercialization of research outcomes is necessary to provide real advancement in the biomedical field. Therefore, the aim of this study was to investigate the challenges involved in the development of antimicrobial dental implant surfaces to fight peri-implantitis, through a systematic search. Research articles reporting antimicrobial dental implant surfaces were identified by searching PubMed, Scopus, Web of Science, The Cochrane Library, Embase, and System of Information on Grey Literature in Europe, between 2008 and 2020. A total of 1778 studies were included for quality assessment and the review. An impressive number of 1655 articles (93,1%) comprised in vitro studies, whereas 123 articles refer to in vivo investigations. From those 123, 102 refer to animal studies and only 21 articles were published on the clinical performance of antibacterial dental implant surfaces. The purpose of animal studies is to test how safe and effective new treatments are before they are tested in people. Therefore, the discrepancy between the number of published studies clearly reveals that preclinical investigations still come up against several challenges to overcome before moving forward to a clinical setting. Additionally, researchers need to recognize that the complex journey from lab to market requires more than a great idea and resources to develop a commercial invention; research teams must possess the skills necessary to commercialize an invention

    Planejamento em saúde: uma possibilidade de ação participativa Planeamiento integrado de salud: una possibilitad de la acción participativa Integrated planning in health: a possibility of a participative action

    No full text
    Este trabalho pretende relatar uma experiência vivenciada com o processo de planejamento integrado em uma Unidade Básica de Saúde de Ribeirão Preto-SP. Elegemos como objeto de análise as interações e diálogos que se expressaram no âmbito do Sistema Local de Saúde. Assim procuramos levar em consideração as dinâmicas particulares desta realidade e os agentes sociais envolvidos (docentes, alunos, dirigentes, trabalhadores de saúde e membros da comunidade), na tentativa de compreender o agir comunicativo segundo HABERMAS (1989). Acreditamos ser este um espaço em aberto na perspectiva de ampliar o nível de participação integrada na administração dos serviços públicos de saúde.<br>Este trabajo intenta narrar una experiencia vivenciada con el proceso de planeamiento integrado en una Unidad Básica de Salud de Ribeirão Preto-SP. Elegimos como objeto de análisis las interacciones y los diálogos que se manifestaron distintamente en el campo de actividad del Sistema Local de Salud. Así procuramos considerar las dinámicas particulares de esta realidad y los agentes sociales comprometidos (docentes, alumnos, dirigentes, trabajadores de salud y miembros de la comunidad) en la tentativa de compreender el proceder comunicativo según HABERMAS (1989). Creemos que sea este un espacio abierto en la perspectiva de ampliar el nivel de participación integrada en la administración de los servicios públicos de salud.<br>This paper intends to report an experience with the process of integrated planning in a Basic Health Unit at Ribeirão Preto-SP. We selected as our object of analysis the interactions and dialogues that were expressed in the scope of the local Health System. Therefore, we sought to consider the individual dynamics of this reality and the social agents involved (teachers, students, directors, health workers and community members), trying to understand the communicative action according to HABERMAS (1989). We believe that this is an open space in the perspective of widening the level of integrated participation in the administration of public health services
    corecore