335 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of CoimbraPT197 papers
- Universidade Federal de Santa CatarinaBR23 papers
- Instituto Superior TécnicoPT20 papers
- Joint Institute for Nuclear ResearchRU17 papers
- Centre National de la Recherche ScientifiqueFR14 papers
- University of LisbonPT12 papers
- Instituto Tecnológico de AeronáuticaBR8 papers
- Universidade Federal de Minas GeraisBR8 papers
- Universidade de São PauloBR7 papers
- Universidade Federal do ABCBR7 papers
- Bogolyubov Institute for Theoretical PhysicsUA6 papers
- Ghent UniversityBE6 papers
25 papers · 1 filter
Gluons at finite temperature
P. J. Silva, O. Oliveira, D. Dudal +2
The gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we…
Gluon and Ghost Dynamics from Lattice QCD
O. Oliveira, A. G. Duarte, D. Dudal +1
The two point gluon and ghost correlation functions and the three gluon vertex are investigated, in the Landau gauge, using lattice simulations. For the two point functions, we dis…
Why static bound-state calculations of tetraquarks should be met with scepticism
George Rupp, Eef van Beveren
Recent experimental signals have led to a revival of tetraquarks, the hypothetical hadronic states proposed by Jaffe in 1976 to explain the light scalar mesons. Meso…
Pasta phases within the QMC model
Guilherme Grams, Alexandre M. Santos, Prafulla K. Panda +2
In this work the low density regions of nuclear and neutron star matter are studied. The search for the existence of pasta phases in this region is performed within the context of…
Stationarity of the inter-event power-law distributions
Yerali Gandica, Joao Carvalho, Fernando Sampaio Dos Aidos +2
A number of human activities exhibit a bursty pattern, namely periods of very high activity that are followed by rest periods. Records of these processes generate time series of ev…
Momentum correlations of scattered particles in quantum field theory: one-loop entanglement generation
Ricardo Faleiro, Rafael Pavão, Helder Alexander +3
We compute the entanglement entropy variation between initial (separable or entangled in the momenta) and final states in an elastic scattering of a bipartite system compose…
Lamb shift of the Dirac cone of graphene
Pedro Miguel M. C. de Melo, Andrea Marini
The fluctuations of the electromagnetic vacuum are one of the most powerful manifestations of the quantum structure of nature. Their effect on the Dirac electrons of graphene is kn…
Relativistic mechanical-thermodynamical formalism -- description of inelastic collisions
Julio Guemez, Manuel Fiolhais, Luis A. Fernandez
We present a relativistic formalism inspired on the Minkowski four-vectors that also includes conservation laws such as the first law of thermodynamics. It remains close to the rel…
algebra ambiguities in Feynman amplitudes: momentum routing invariance and anomalies in and
A. C. D. Viglioni, A. L. Cherchiglia, A. R. Vieira +2
We address the subject of chiral anomalies in two and four dimensional theories. Ambiguities associated with the algebra within divergent integrals are identified, even thoug…
On the work of internal forces
Julio Guemez, Manuel Fiolhais, Lucilia Brito
We discuss the role of the internal forces and how their work changes the energy of a system. We illustrate the contribution of the internal work to the variation of the system's e…
Dissipation effects in mechanics and thermodynamics
Julio Guemez, Manuel Fiolhais
With the discussion of three examples, we aim at clarifying the concept of energy transfer associated with dissipation in mechanics and in thermodynamics. The dissipation effects d…
Heavy Quark Entropy shift: From the Hadron Resonance Gas to Power Corrections
E. Megias, E. Ruiz Arriola, L. L. Salcedo
A heavy quark placed in the medium modifies its specific heat. Using a renormalization group argument we show a low energy theorem in terms of the defect in the trace of the energy…
Lattice Gluon and Ghost Propagators, and the Strong Coupling in Pure SU(3) Yang-Mills Theory: Finite Lattice Spacing and Volume Effects
Anthony G. Duarte, Orlando Oliveira, Paulo J. Silva
The dependence of the Landau gauge two point gluon and ghost correlation functions on the lattice spacing and on the physical volume are investigated for pure SU(3) Yang-Mills theo…
Neutron star radii and crusts: uncertainties and unified equations of state
M. Fortin, C. Providencia, A. R. Raduta +4
The uncertainties in neutron star (NS) radii and crust properties due to our limited knowledge of the equation of state (EOS) are quantitatively analysed. We first demonstrate the…
Correlation of the neutron star crust-core properties with the slope of the symmetry energy and the lead skin thickness
H. Pais, A. Sulaksono, B. K. Agrawal +1
The correlations of the crust-core transition density and pressure in neutron stars with the slope of the symmetry energy and the neutron skin thickness are investigated, using dif…
Velocity operator approach to quantum fluid dynamics in a three-dimensional neutron-proton system
Seiya Nishiyama, Joao da Providencia
In the preceeding paper, introducing isospin-dependent density operators and defining exact momenta (collective variables), we could get an exact canonically momenta approach to a…
Single-particle spectral function of the hyperon in finite nuclei
Isaac Vidana
The spectral function of the hyperon in finite nuclei is calculated from the corresponding self-energy, which is constructed within a perturbative many-body approach using…
Is the magnetic field making the inner crust of neutron stars more heterogeneous?
Jianjun Fang, Sidney Avancini, Helena Pais +1
We study the effect of strong magnetic fields, of the order of G, on the extension of the crust of magnetized neutron stars. The dynamical instability region of n…
Neutron stars: from the inner crust to the core with the (Extended) Nambu-Jona-Lasinio model
Helena Pais, Débora P. Menezes, Constança Providência
Nucleonic matter is described within a su(2) extended Nambu-Jona-Lasinio model. Several parametrizations with different nuclear matter saturation properties are proposed. At subsat…
Boltzmann equation with double-well potentials
Silvia Chiacchiera, Tommaso Macrì, Andrea Trombettoni
We study the dynamics of an interacting classical gas trapped in a double-well potential at finite temperature. Two model potentials are considered: a cubic box with a square barri…
Quark matter nucleation in neutron stars and astrophysical implications
Ignazio Bombaci, Domenico Logoteta, Isaac Vidana +1
A phase of strong interacting matter with deconfined quarks is expected in the core of massive neutron stars. We investigate the quark deconfinement phase transition in cold (T = 0…
On the origin of burstiness in human behavior: The wikipedia edits case
Yerali Gandica, Joao Carvalho, Fernando Sampaio Dos Aidos +2
A number of human activities exhibit a bursty pattern, namely periods of very high activity that are followed by rest periods. Records of this process generate time series of event…
Gluon Dynamics, Center Symmetry and the deconfinement phase transition in SU(3) pure Yang-Mills theory
P. J. Silva, O. Oliveira
The correlations between the modulus of the Polyakov loop, its phase and the Landau gauge gluon propagator at finite temperature are investigated in connection with the center…
Hyperons in neutron stars and supernova cores
M. Oertel, F. Gulminelli, C. Providencia +1
The properties of compact stars and their formation processes depend on many physical ingredients. The composition and the thermodynamics of the involved matter is one of them. We…