96 research outputs found
Alvin S. Felzenberg, A Man and His Presidents: The Political Odyssey of William F. Buckley Jr.
No full textAlvin S. Felzenberg, A Man and His Presidents: The Political Odyssey of William F. Buckley Jr. New Haven: Yale University Press, 2017. Pp. 417. ISBN:9780300163841. Marcus Walsh-Führing In Alvin Felzenberg’s book, A Man and His Presidents: The Political Odyssey of William F. Buckley Jr., the author covers the political life of Buckley by focusing on his career as a political strategist and a major center-right political actor of his era. The book fills a gap in the literature on the develop..
Policy Creation to Policy Management: Development of the Brazilian National Government as a “Gatekeeper”
No full textThe incorporation of National Public Management (npm) in Brazil has challenged the centralizing role of the national government as a policy creator, due to the npm decentralized structure in implementing administrative policy. The author hypothesizes that the introduction of such a decentralized model into the Brazilian national government creates a contradiction to its traditional centralizing role as a policy creator, and forces it to take on the role of a policy manager. This hypothesis is backed up by a research design that relies on process tracing analysis of primary and secondary sources on Brazilian administrative policy in the npm model, and on documentation of neoliberal pressures from the international community to demonstrate the convergence of political discourse. The following analysis will demonstrate the pressure from these political forces on the Brazilian national government to maintain its political legitimacy. This pressure has led to re-centralization by the state in the domestic administrative policy discourse, while the implementation of the npm model and thereof resulting neoliberal policies introduced by the international community have created an administrative decentralized environment. Consequently, the implementation of the npm model has led to fragmentation domestically and challenged the policy agenda of the national government in the centralization of the decision-making process around fiscal and political agendas, while decentralizing the implementation of administrative policies following the npm model with a neoliberal agenda. These findings suggest a need to examine the role of the national government as “Gatekeeper”, particularly in regards to changes toward institutional relationships
Measurement of the <math display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mi>b</mi></mrow><mrow><mn>0</mn></mrow></msubsup><mo stretchy="false">→</mo><mi mathvariant="normal">Λ</mi><mo stretchy="false">(</mo><mn>1520</mn><mo stretchy="false">)</mo><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>μ</mi></mrow><mrow><mo>-</mo></mrow></msup></mrow></math> Differential Branching Fraction
No full textThe branching fraction of the rare decay is measured for the first time, in the squared dimuon mass intervals, , excluding the and regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of . The result in the highest interval, , where theoretical predictions have the smallest model dependence, agrees with the predictions.The branching fraction of the rare decay Λb0→Λ(1520)μ+μ- is measured for the first time, in the squared dimuon mass intervals q2, excluding the J/ψ and ψ(2S) regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb-1. The result in the highest q2 interval, q2>15.0 GeV2/c4, where theoretical predictions have the smallest model dependence, agrees with the predictions.The branching fraction of the rare decay is measured for the first time, in the squared dimuon mass intervals, , excluding the and regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of . The result in the highest interval, , where theoretical predictions have the smallest model dependence, agrees with the predictions
Sugar activation and glycosylation in Plasmodium
No full textTKS thanks previous funding from the Wellcome Trust (093228), SUSLA and BBSRC, and current funding from MRC (MR/M020118/1) and European Community’s Seventh Framework Programme under grant agreement No. 602773 (Project KINDRED). MC, JAR and LI are members of the GlycoPar-EU consortium (FP7 funded Marie Curie Initial Training Network), Grant Agreement Number GA. 608295.Glycoconjugates are important mediators of host-pathogen interactions and are usually very abundant in the surface of many protozoan parasites. However, in the particular case of Plasmodium species, previous works show that glycosylphosphatidylinositol anchor modifications, and to an unknown extent, a severely truncated N-glycosylation are the only glycosylation processes taking place in the parasite. Nevertheless, a detailed analysis of the parasite genome and the recent identification of the sugar nucleotide precursors biosynthesized by Plasmodium falciparum support a picture in which several overlooked, albeit not very prominent glycosylations may be occurring during the parasite life cycle. In this work, the authors review recent developments in the characterization of the biosynthesis of glycosylation precursors in the parasite, focusing on the outline of the possible fates of these precursors.Peer reviewe
Test of lepton universality with decays
No full textLepton flavour universality in rare transitions is tested for the first time using meson decays. The measurements are performed using collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9. Branching fraction ratios between the and decays are measured in three regions of dilepton mass squared, , with 0.1 b→s transitions is tested for the first time using Bs0 meson decays. The measurements are performed using pp collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fb-1. Branching fraction ratios between the Bs0→ϕe+e- and Bs0→ϕμ+μ- decays are measured in three regions of dilepton mass squared, q2, with 0.1<q2<1.1, 1.1<q2<6.0, and 15<q2<19 GeV2/c4. The results agree with the standard model expectation of lepton flavor universality.Lepton flavour universality in rare b\rightarrow sB_s^0pp\,{\rm fb}^{-1}B_s^0 \rightarrow \phi e^+e^-B_s^0 \rightarrow \phi \mu^+\mu^-q^20.1 < q^2 < 1.11.1 < q^2 < 6.015 < q^2 < 19\,{\rm GeV}^2/c^4$. The results agree with the Standard Model expectation of lepton flavour universality
Amplitude analysis of the decay
No full textInternational audienceAn amplitude analysis of the decay is presented using a dataset corresponding to an integrated luminosity of fb of collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the Standard Model, are extracted directly from the data through a -unbinned amplitude analysis, where is the invariant mass squared. Long-distance contributions, which originate from non-factorisable QCD processes, are systematically investigated and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent with previous analyses of - to -quark transitions, with the largest discrepancy from the Standard Model predictions found to be at the level of 1.8 standard deviations. The global significance of the observed differences in the decay is 1.4 standard deviations
Angular analysis of the decay
No full textInternational audienceAn angular analysis of the decay is presented, using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8 and 13. The combined dataset corresponds to an integrated luminosity of . Observables are determined by fitting time-integrated projections of the angular distribution in three bins of dielectron mass squared, , corresponding to , and . The results are compatible with predictions based on the Standard Model of particle physics
Test of lepton flavour universality with decays
No full textThe first test of lepton flavour universality between muons and electrons using () decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of . The ratio of branching fractions between and } decays is measured in the dilepton invariant-mass-squared range and is found to be , in agreement with the Standard Model prediction. The first observation of the decay is also reported.The first test of lepton flavor universality between muons and electrons using () decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13~TeV, corresponding to an integrated luminosity of . The ratio of branching fractions between and decays is measured in the dilepton invariant-mass-squared range and is found to be , in agreement with the standard model prediction. The first observation of the decay is also reported.The first test of lepton flavor universality between muons and electrons using () decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of . The ratio of branching fractions between and decays is measured in the dilepton invariant-mass-squared range and is found to be , in agreement with the standard model prediction. The first observation of the decay is also reported
Determination of short- and long-distance contributions in decays
No full textInternational audienceAn amplitude analysis of the decay is presented. The analysis is based on data collected by the LHCb experiment from proton-proton collisions at and TeV, corresponding to an integrated luminosity of fb. For the first time, Wilson coefficients and non-local hadronic contributions are accessed directly from the unbinned data, where the latter are parameterised as a function of with a polynomial expansion. Wilson coefficients and non-local hadronic parameters are determined under two alternative hypotheses: the first relies on experimental information alone, while the second one includes information from theoretical predictions for the non-local contributions. Both models obtain similar results for the parameters of interest. The overall level of compatibility with the Standard Model is evaluated to be between 1.8 and 1.9 standard deviations when looking at the Wilson coefficient alone, and between 1.3 and 1.4 standard deviations when considering the full set of and Wilson coefficients. The ranges reflect the theoretical assumptions made in the analysis
Observation of the open-charm tetraquark candidate Tcs0*(2870)0 in the B−→D−D0KS0 decay
No full textAn amplitude analysis of B− → D−D0K0
S decays is performed using proton-proton collision data,
corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector at center-of-mass
energies of 7, 8, and 13 TeV. A resonant structure of spin-parity 0+ is observed in the D0K0
S invariant-mass
spectrum with a significance of 5.3σ. The mass and width of the state, modeled with a Breit-Wigner line
shape, are determined to be 2883 ± 11 ± 8 MeV/c2 and 87+22
−47 17 MeV, respectively, where the first
uncertainties are statistical and the second systematic. These properties and the quark content are consistent
with those of the open-charm tetraquark candidate T*
cs0(2870)0 observed previously in the D+K− final state
of the B− → D−D+K− decay. This result confirms the existence of the T*
cs0(2870)0 state in a new decay
mode. The T*
cs1(2900)0 state, reported in the B− → D−D+K− decay, is also searched for in the D0K0
S
invariant-mass spectrum of the B− → D−D0K0
S decay, without finding evidence for it
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