Odilon Lourenço

Prof. Odilon Lourenço

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Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 March 2012 in Physical Review C
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MDMariana Dutra
Mariana Dutra
OLOdilon Lourenço
Odilon Lourenço
JMJ. S. Sá Martins
J. S. Sá Martins
ADA. Delfino
A. Delfino
JSJ. R. Stone
J. R. Stone
Paul StevensonPaul Stevenson
Paul Stevenson
This paper presents a detailed assessment of the ability of the 240 Skyrme interaction parameter sets in the literature to satisfy a series of criteria derived from macroscopic properties of nuclear matter in the vicinity of nuclear saturation density at zero temperature and their density dependence, derived by the liquid-drop model, in experiments with giant resonances and heavy-ion collisions. The objective is to identify those parametrizations which best satisfy the current understanding of the physics of nuclear matter over a wide range of applications. Out of the 240 models, only 16 are shown to satisfy all these constraints. Additional, more microscopic, constraints on the density dependence of the neutron and proton effective mass β-equilibrium matter, Landau parameters of symmetric and pure neutron nuclear matter, and observational data on high- and low-mass cold neutron stars further reduce this number to 5, a very small group of recommended Skyrme parametrizations to be used in future applications of the Skyrme interaction of nuclear-matter-related observables. Full information on partial fulfillment of individual constraints by all Skyrme models considered is given. The results are discussed in terms of the physical interpretation of the Skyrme interaction and the validity of its use in mean-field models. Future work on application of the Skyrme forces, selected on the basis of variables of nuclear matter, in the Hartree-Fock calculation of properties of finite nuclei, is outlined.

10 November 2014 in Physical Review C
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MDMariana Dutra
Mariana Dutra
OLOdilon Lourenço
Odilon Lourenço
SAS. S. Avancini
S. S. Avancini
BCB. V. Carlson
B. V. Carlson
ADA. Delfino
A. Delfino
JSJ. R. Stone
J. R. Stone
Background: The microscopic composition and properties of infinite hadronic matter at a wide range of densities and temperatures have been subjects of intense investigation for decades. The equation of state (EoS) relating pressure, energy density, and temperature at a given particle number density is essential for modeling compact astrophysical objects such as neutron stars, core-collapse supernovae, and related phenomena, including the creation of chemical elements in the universe. The EoS depends not only on the particles present in the matter, but, more importantly, also on the forces acting among them. Because a realistic and quantitative description of infinite hadronic matter and nuclei from first principles in not available at present, a large variety of phenomenological models has been developed in the past several decades, but the scarcity of experimental and observational data does not allow a unique determination of the adjustable parameters.

16 June 2014 in Physical Review D
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MFM. Ferreira
M. Ferreira
PCPedro Costa
Pedro Costa
OLOdilon Lourenço
Odilon Lourenço
TFTobias Frederico
Tobias Frederico
Constança ProvidênciaConstança Providência
Constança Providência
The QCD phase diagram at zero chemical potential and finite temperature subject to an external magnetic field is studied within the three-flavor Nambu\char21{}Jona-Lasinio (NJL) model and the NJL model with the Polyakov loop. A scalar coupling parameter dependent on the magnetic field intensity is considered. The scalar coupling has been fitted so that the lattice QCD pseudocritical chiral transition temperatures are reproduced and in the limit of large magnetic field decreases with the inverse of the magnetic field intensity. This dependence of the coupling allows us to reproduce the lattice QCD results with respect to the quark condensates and Polyakov loop: due to the magnetic field the quark condensates are enhanced at low and high temperatures and suppressed for temperatures close to the transition temperatures and the Polyakov loop increases with the magnetic field.

16 February 2016 in Physical Review C
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MDMariana Dutra
Mariana Dutra
OLOdilon Lourenço
Odilon Lourenço
DMDebora Peres Menezes
Debora Peres Menezes
We analyze the stellar properties of the relativistic mean-field (RMF) parametrizations shown to be consistent with the recently studied constraints related to nuclear matter, pure neutron matter, symmetry energy, and its derivatives [ Phys. Rev. C 90, 055203 (2014)]. Our results show that only two RMF parametrizations do not allow the emergence of the direct Urca process, important aspect regarding the evolution of a neutron star. Moreover, among all approved RMF models, fourteen of them produce neutron stars with maximum masses inside the range 1.93≤M/M⊙≤2.05, with M⊙ being the solar mass. Only three models yield maximum masses above this range and a discussion on the inclusion of hyperons is presented. Finally, we verified that the models satisfying the neutron star maximum mass constraint do not observe the squared sound velocity bound; namely, vs2<1/3, corroborating recent findings. However, the recently proposed σ-cut scheme can make the RMF models consistent with both constraints, depending on the isoscalar-vector interaction of each parametrization.

2 April 2019 in Physical Review C
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OLOdilon Lourenço
Odilon Lourenço
MDMariana Dutra
Mariana Dutra
CLCésar H. Lenzi
César H. Lenzi
CFCésar Flores
César Flores
DMDébora P. Menezes
Débora P. Menezes
We have obtained the Love number and corresponding tidal deformabilities (Λ) associated with the relativistic mean-field parametrizations shown to be consistent (CRMF) with the nuclear matter, pure neutron matter, symmetry energy, and its derivatives [Dutra et al., Phys. Rev. C 90, 055203 (2014)]. Our results show that CRMF models present very good agreement with the recent data from binary neutron star merger event GW170817. They also confirm the strong correlation between Λ1.4 and the radius of canonical stars (R1.4). When a recent GW170817 constraint on Λ1.4 and the corresponding radius R1.4 is used, the majority of the models tested are shown to satisfy it.

1 December 2020 in Journal of Cosmology and Astroparticle Physics
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Ronaldo LobatoRonaldo Lobato
Ronaldo Lobato
OLOdilon Lourenço
Odilon Lourenço
Pedro Henrique Ribeiro da Silva MoraesPedro Henrique Ribeiro da Silva Moraes
Pedro Henrique Ribeiro da Silva Moraes
CLC.H. Lenzi
C.H. Lenzi
MAMarcio Guilherme Bronzato de Avellar
Marcio Guilherme Bronzato de Avellar
MMM. Malheiro
M. Malheiro