Browsing by Author "Silva, L"
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- Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuteronsPublication . COMPASS collaboration (225 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MSingle hadron azimuthal asymmetries in the cross sections of positive and negative hadron production in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data and also all deuteron COMPASS data. For each hadron charge, the dependence of the azimuthal asymmetry on the hadron azimuthal angle $\phi$ is obtained by means of a five-parameter fitting function that besides a $\phi$-independent term includes four modulations predicted by theory: $\sin\phi$, $\sin 2 \phi$, $\sin 3\phi$ and $\cos\phi$. The amplitudes of the five terms have been first extracted for the data integrated over all kinematic variables. In further fits, the $\phi$-dependence is determined as a function of one of three kinematic variables (Bjorken-$x$, fractional energy of virtual photon taken by the outgoing hadron and hadron transverse momentum), while disregarding the other two. Except the $\phi$-independent term, all the modulation amplitudes are very small, and no clear kinematic dependence could be observed within experimental uncertainties.
- Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised protonsPublication . COMPASS collaboration (209 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MMeasurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for pions and there are hints of non-zero signal also for kaons. The Sivers asymmetries are found to be positive for positive pions and kaons and compatible with zero otherwise.
- Delayed Huntington's disease diagnosis in two alcoholic patients with a family history of "Parkinson's disease"Publication . Mesquita, J; Silva, L; Machado, A
- Ekbom's syndrome as the first manifestation of diabetes mellitusPublication . Mesquita, J; Simões, S; Machado, A; Silva, L
- Is there still a place for involutional melancholia nowadays?Publication . Simões, S; Mesquita, J; Santos, B; Silva, L
- Lithium neurotoxicity at normal serum levelsPublication . Mesquita, J; Cepa, S; Silva, L; Machado, A
- Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_T$Publication . COMPASS collaboration (210 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MWe measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^2$ < 1(GeV/$\it c$)$^2$ for transverse hadron momenta $p_T$ in the range 0.7 GeV/$\it c$ to 4 GeV/$\it c$ . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/$\it c$ or 200 GeV/$\it c$ impinging on polarised $\mathrm{{}^6LiD}$ or $\mathrm{NH_3}$ targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation $\Delta G$ inside the nucleon in the range of the nucleon momentum fraction carried by gluons $0.05 < x_g < 0.2$.
- Portuguese recommendations for the use of biological and targeted synthetic diseasemodifying antirheumatic drugs in patients with rheumatoid arthritis – 2020 updatePublication . Fernandes, Bruno Miguel; Guimarães, F; Almeida, DE; Neto, A; Tavares-Costa, J; Ribeiro, AR; Quintal, Alberto; Pereira, JP; Silva, L; Nóvoa, TS; Faustino, A; Vaz, C; Khmelinskii, N; Samões, B; Dourado, E; Silva, JL; Barcelos, A; Mariz, E; Guerra, M; Santos, MJ; Silvério-António, M; Teixeira, RL; Romão, VC; Santos, H; Santos-Faria, D; Azevedo, S; Rodrigues, A; Dias, JM; Lopes, C; Pinto, P; Couto, M; Miranda, LC; Bernardo, A; Cruz, M; Teixeira, F; Mourão, AF; Neto, A; Teixeira, V; Cordeiro, A; Barreira, S; Inês, LS; Capela, S; Sepriano, A; Canhão, H; Fonseca, JE; Duarte, C; Bernardes, MObjective: To update the recommendations for the treatment of rheumatoid arthritis (RA) with biological and targeted synthetic disease-modifying antirheumatic drugs (bDMARDs and tsDMARDs), endorsed by the Portuguese Society of Rheumatology (SPR). Methods: These treatment recommendations were formulated by Portuguese rheumatologists taking into account previous recommendations, new literature evidence and consensus opinion. At a national meeting, in a virtual format, three of the ten previous recommendations were re-addressed and discussed after a more focused literature review. A first draft of the updated recommendations was elaborated by a team of SPR rheumatologists from the SPR rheumatoid arthritis study group, GEAR. The resulting document circulated among all SPR rheumatologists for discussion and input. The level of agreement with each of all the recommendations was anonymously voted online by all SPR rheumatologists. Results: These recommendations cover general aspects such as shared decision, treatment objectives, systematic assessment of disease activity and burden and its registry in Reuma.pt. Consensus was also achieved regarding specific aspects such as initiation of bDMARDs and tsDMARDs, assessment of treatment response, switching and definition of persistent remission. Conclusion: These recommendations may be used for guidance of treatment with bDMARDs and tsDMARDs in patients with RA. As more evidence becomes available and more therapies are licensed, these recommendations will be updated.
- Resonance Production and $\pi\pi$ S-wave in $\pi^- + p \rightarrow \pi^- \pi^- \pi^+ + p_{recoil}$ at 190 GeV$/c$Publication . COMPASS collaboration (210 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MThe COMPASS collaboration has collected the currently largest data set on diffractively produced π-π-π+ final states using a negative pion beam of 190 GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, 0.5
- Search for exclusive photoproduction of Z$_c^{\pm}$(3900) at COMPASSPublication . COMPASS collaboration (209 authors); Bordalo, P; Franco, C; Nunes, Ana Sofia; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MA search for the exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the channel Zc±(3900)→J/ψπ± . The data cover the range from 7 GeV to 19 GeV in the centre-of-mass energy of the photon–nucleon system. The full set of the COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN of 3.7×10−3 has been established at the confidence level of 90%.