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Search Results: 1 - 10 of 72 matches for " Idaleto Malvezzi Aued "
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Mordernization and production of the social exclusion in the Campos Gerais do Paraná, Brazil Moderniza o e produ o da miséria nos Campos Gerais do Paraná
Edu Silvestre Albuquerque,Idaleto Malvezzi Aued
Revista de História Regional , 2009,
Abstract: The idea of the delay or archaism of the elites from Campos Gerais do Paraná supported in the great country properties and extensive creation appears spread in academic works, literature and the media, influencing the proper course of the politics of regional development. However, we defend the thesis of that the modernity these local elites in the long of history because of constant modernizations of the regional productive process and the production of the social exclusion. A idéia do atraso ou arcaísmo das elites dos Campos Gerais do Paraná sustentadas no bin mio latifúndio pecuária extensiva aparece disseminada em trabalhos acadêmicos, na literatura e na mídia, influenciando o próprio curso das políticas de desenvolvimento regional. Contudo, defendemos a tese da modernidade dessas elites locais ao longo da história em raz o das constantes moderniza es do processo produtivo regional e de sua nefasta contra-face: a produ o da miséria.
Analysis of Substructures in Charm Decays
Sandra Malvezzi
Physics , 1996,
Abstract: Recent results on Dalitz analysis of three-pseudoscalar decays are discussed in the context of probing charm hadronic-decay mechanisms: the role of FSI effects, which create phase shifts between the interfering resonant channels, can be studied in the different decay modes and the annihilation contribution measured in the charm sector through the $D^+_s \to \pi^+\pi^-\pi^+$ decay.
Tetracritical behaviour in a spin-3/2 quantum chain
A. Malvezzi
Physics , 1994,
Abstract: Finite-Size-Scaling and Conformal Invariance are used in order to find the phase diagram and critical exponents of a quantum spin chain with spin $S=3/2$. The model has a tetracritical point besides critical lines. The conformal anomaly and anomalous dimensions of some primary operators are calculated at the tetracritical point.
Charm lifetime
Sandra Malvezzi
Physics , 1995, DOI: 10.1007/BF02731706
Abstract: A review of the charmed meson and baryon lifetimes is presented. Our knowledge of charmed particle lifetimes has greatly improved over the past two years, a crucial r\^ole having been played by the E687 experiment at Fermilab, which has almost quadrupled the samples of $D$ mesons. The lifetime ratios $\tau(D^+)/\tau(D^0)$ and $\tau(D_s^+)/\tau(D^0)$ are now known with an accuracy of 1.7\% and 3.7\% respectively. In the baryon sector the statistics is still limited, but the experimental results on $\Lambda_c^+$, $\Xi_c^0$ and $\Xi_c^+$ exhibit a clear pattern of lifetime hierarchy, as expected from simple theoretical arguments. The first measurement of $\tau(\Omega_c^0)$ from E687 is also presented to complete the charmed baryon lifetime picture. The more accurate experimental scenario can provide information on non-perturbative QCD effects and the hadronic matrix elements.
Light quark and charm interplay in the Dalitz-plot analysis of hadronic decays in FOCUS
Sandra Malvezzi
Physics , 2003, DOI: 10.1016/S0920-5632(03)02334-X
Abstract: The potentiality of interpreting the D-meson decay-dynamics has revealed itself to be strongly dependent on our understanding of the light-meson sector. The statistics collected by FOCUS is already at a level that manifests parametrization problems for scalar particles. In this paper the first application of the K-matrix approach in the charm sector is illustrated and preliminary results on the D+ and Ds decays to three pions are shown.
K-matrix and Dalitz plot analysis from FOCUS
S. Malvezzi
Physics , 2007,
Abstract: Dalitz analysis is a powerful tool for physics studies within and beyond the Standard Model. In the last decade it has helped to investigate the Heavy Flavor hadronic decay dynamics and is now being applied to extract angles of the CKM Unitarity triangle. To perform such sophisticate analyses we need to model the strong interaction effects. The FOCUS experiment has performed pilot studies in the charm sector through the K-matrix formalism. What has been learnt from charm will be beneficial for future accurate beauty measurements. Experience and results from FOCUS are presented and discussed.
Status and prospects of charm physics: a few considerations
Sandra Malvezzi
Physics , 2004,
Abstract: Progress in charm physics has been prodigious over the last twenty years; it comes both from fixed target and collider experiments, and can guide us toward future investigations. To fully exploit the power of flavor physics, complications coming from strong dynamics effects have to be dealt with. The role of charm in the search for New Physics, the lessons learnt so far and warnings for the future are briefly discussed.
An introduction to numerical methods in low-dimensional quantum systems
Malvezzi, André Luiz;
Brazilian Journal of Physics , 2003, DOI: 10.1590/S0103-97332003000100004
Abstract: this is an introductory course to the lanczos method and density matrix renormalization group algorithms (dmrg), two among the leading numerical techniques applied in studies of low-dimensional quantum models. the idea of studying the models on clusters of a finite size in order to extract their physical properties is briefly discussed. the important role played by the model symmetries is also examined. special emphasis is given to the dmrg.
An introduction to numerical methods in low-dimensional quantum systems
Malvezzi André Luiz
Brazilian Journal of Physics , 2003,
Abstract: This is an introductory course to the Lanczos Method and Density Matrix Renormalization Group Algorithms (DMRG), two among the leading numerical techniques applied in studies of low-dimensional quantum models. The idea of studying the models on clusters of a finite size in order to extract their physical properties is briefly discussed. The important role played by the model symmetries is also examined. Special emphasis is given to the DMRG.
Heavy Flavor decays and light hadrons in the FOCUS experiment: recent results
Sandra Malvezzi,for the FOCUS collaboration
Physics , 2008, DOI: 10.1063/1.2973554
Abstract: Interpretation of D-meson decay-dynamics has revealed itself to be strongly dependent on our understanding of the light-meson sector. The interplay becomes particularly evident in Dalitz plot analyses to study physics within and beyond the Standard Model. Experience and results from FOCUS are presented and discussed. A brief update of the pentaquark search in the experiment is also reported.
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