Browsing by Author "Araújo, Mariana"
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- Eficácia da comunicação do serviço de Reabilitação CardíacaPublication . Araújo, Mariana; Farinha, NunoAtendendo às dificuldades de implementação de um serviço de Reabilitação Cardíaca em Portugal, nomeadamente no que respeita à implementação e sucesso de estratégias de marketing e comunicação para este tipo de serviços de saúde, a presente investigação toma como objeto de estudo o serviço de Reabilitação Cardíaca do Instituto de Cardiologia Preventiva de Almada. Através da análise de dados secundários, foram identificadas as estratégias de comunicação desenvolvidas para esse serviço. Seguidamente tentou-se apurar o grau de perceção dessas estratégias pelos prestadores de saúde com quem a instituição se relaciona no Concelho de Almada. O apuramento da eficácia da comunicação dessas estratégias foi realizado através de um estudo exploratório e de um estudo descritivo, este último através de um inquérito submetido aos prestadores de saúde. Conclui-se que o grau de awareness do serviço é elevado, principalmente para os prestadores que colaboram com a instituição, porém nem todas as estratégias foram completamente apreendidas, ou seja, existe um fraco conhecimento aprofundado sobre procedimentos do serviço e outras informações úteis para a referenciação do mesmo, por parte dos prestadores. Torna-se evidente que existe necessidade de informação mais aprofundada e formação sobre o serviço de Reabilitação Cardíaca.
- From identical S- and P-wave $p_\mathrm{T}$ spectra to maximally distinct polarizations: probing NRQCD with $\chi $ statesPublication . Faccioli, Pietro; Lourenço, Carlos; Araújo, Mariana; Seixas, João; Krätschmer, Ilse; Knünz, ValentinA global analysis of ATLAS and CMS measurements reveals that, at mid-rapidity, the directly-produced $\chi_{c1}$, $\chi_{c2}$ and J/$\psi$ mesons have differential cross sections of seemingly identical shapes, when presented as a function of the mass-rescaled transverse momentum, $p_{\rm T}/M$. This identity of kinematic behaviours among S- and P-wave quarkonia is certainly not a natural expectation of non-relativistic QCD (NRQCD), where each quarkonium state is supposed to reflect a specific family of elementary production processes, of significantly different $p_{\rm T}$-differential cross sections. Remarkably, accurate kinematic cancellations among the variegated NRQCD terms (colour singlets and octets) of its factorization expansion can lead to a surprisingly good description of the data. This peculiar tuning of the NRQCD mixtures leads to a clear prediction regarding the $\chi_{c1}$ and $\chi_{c2}$ polarizations, the only observables not yet measured: they should be almost maximally different from one another, and from the J/$\psi$ polarization, a striking exception in the global panorama of quarkonium production. Measurements of the difference between the $\chi_{c1}$, $\chi_{c2}$ and J/$\psi$ polarizations, complementing the observed identity of momentum dependences, represent a decisive probe of NRQCD.
- Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patternsPublication . Faccioli, Pietro; Lourenço, Carlos; Araújo, Mariana; Knünz, Valentin; Krätschmer, Ilse; Seixas, JoãoThe LHC quarkonium production measurements reveal a startling observation: the J/$\psi$, $\psi$(2S), $\chi_{c1,2}$ and $\Upsilon$(nS) $p_{\rm T}$-differential cross sections are compatible with one universal momentum scaling pattern. Considering also the absence of strong polarizations of directly and indirectly produced S-wave mesons, we are led to the conclusion that there is currently no evidence of a dependence of the partonic production mechanisms on the quantum numbers and mass of the final state. The experimental observations supporting this universal production scenario are remarkably significant, as shown by a new analysis approach, unbiased by specific theoretical calculations of partonic cross sections, which are only considered a posteriori, in comparisons with the data-driven results.
- Universal kinematic scaling as a probe of factorized long-distance effects in high-energy quarkonium productionPublication . Faccioli, Pietro; Lourenço, Carlos; Araújo, Mariana; Seixas, JoãoDimensional analysis reveals general kinematic scaling rules for the momentum, mass, and energy dependence of Drell–Yan and quarkonium cross sections. Their application to mid-rapidity LHC data provides strong experimental evidence supporting the validity of the factorization ansatz, a cornerstone of non-relativistic QCD, still lacking theoretical demonstration. Moreover, data-driven patterns emerge for the factorizable long-distance bound-state formation effects, including a remarkable correlation between the S-wave quarkonium cross sections and their binding energies. Assuming that this scaling can be extended to the P-wave case, we obtain precise predictions for the not yet measured feed-down fractions, thereby providing a complete picture of the charmonium and bottomonium feed-down structure. This is crucial information for quantitative interpretations of quarkonium production data, including studies of the suppression patterns measured in nucleus-nucleus collisions.