Elliptic Flow
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Sobre a evolução hidrodinâmica da matéria nuclear criada em colisões de íons pesados relativísticos - um estudo com condições iniciais flutuantes / On the hydrodynamic evolution of the nuclear matter created in relativistic heavy ion collisions - a study with fluctuating initial conditions
In this work we apply a hydrodynamic model with fluctuating initial conditions in a event by event basis to study some observables in relativistic heavy ion collisions. We show that the introduction of fluctuations, characterized by longitudinal high energy density tubes, turn the computation of the observables closer to data, in comparison to the traditiona
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/09/2011
-
2. Estudo sobre o fluxo dirigido / A study about directed flow
Nesta tese estudamos o fluxo dirigido, a primeira componente na expansão de Fourier da distribuição azimutal das partículas emitidas. Diferente do fluxo elíptico, que é muito bem estudado e descrito na literatura, a física que gera este observável ainda não é muito conhecida. Mostramos que este observável é altamente sensível a condições inici
Publicado em: 2010
-
3. Conjuntos Invariantes de Fluxo Decrescente na Teoria dos Pontos Críticos e Aplicações às Equações Diferenciais Não-Lineares
In this work, we studied a certain proprieties of invariant sets of descending flow defined by pseudogradient vector field. This analysis permit us to determine the existence and multiplicity of critical points of certain functionals bounded below in invariant sets by associate flow. We applied this concepts to nonlinear elliptic boundary value problems and
Publicado em: 2008
-
4. Laminar elliptic flow in the entrance region of tubes
The developing region of an axially symmetric laminar flow from a reservoir to a sharp-edged tube is numerically simulated with a primitive-variables solver of the Navier-Stokes equations, using a plenum upstream of the tube inlet in order to avoid arbitrary specification of the profile at the inlet. Development region lengths, velocity profiles and head los
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-09
-
5. Effect of event-by-event fluctuations on hydrodynamical evaluation of elliptical flow
Elliptic flow at RHIC is computed event-by-event with NeXSPheRIO. We show that when symmetry of the particle distribution in relation to the reaction plane is assumed, there is a disagreement between the true and reconstructed elliptic flows. We suggest a possible way to take into account the asymmetry and get good agreement between these elliptic flows.
Braz. J. Phys.. Publicado em: 2007-06
-
6. Elliptic flow, eccentricity and eccentricity fluctuations
Differential studies of elliptic flow are one of the most powerful tools in studying the initial conditions and dynamical evolution of heavy ion collisions. The comparison of data from Cu+Cu and Au+Au collisions taken with the PHOBOS experiment at RHIC provides new information on the interplay between initial geometry and initial particle density in determin
Braz. J. Phys.. Publicado em: 2007-06
-
7. Partonic equation of state in relativistic heavy ion collisions
Recent results on chemical freeze-out, elliptic flow v2 and multi-strange hadron transverse momentum distributions are discussed and compared with model predictions. The idea of heavy flavor collectivity and light flavor thermalization is presented in the light of recent heavy flavor measurement at RHIC.
Braz. J. Phys.. Publicado em: 2007-06
-
8. A study of áv2ñ with NeXSPheRIO
Elliptic flow at RHIC is computed event by event with NeXSPheRIO. Reasonable agreement with experimental data on v2(eta) and v2(pt) is obtained. Various effects are studied as well: equation of state (with or without critical point), emission mechanism (Cooper-Frye prescription or continuous emission), type of the initial conditions (average or fluctuating i
Brazilian Journal of Physics. Publicado em: 2007-03
-
9. Effects of nucleus initialization on event-by-event observables
In this work we present a study of the influence of nucleus initializations on the event-by-event elliptic flow coefficient, v2. In most Monte-Carlo models, the initial positions of the nucleons in a nucleus are completely uncorrelated, which can lead to very high density regions. In a simple, yet more realistic model where overlapping of the nucleons is avo
Brazilian Journal of Physics. Publicado em: 2007-03
-
10. Um estudo hidrodinâmico do fluxo elíptico em colisões nucleares relativísticas / A hydrodynamic study of the elliptic flow in relativistic nuclear collisions
Nesta dissertação calculamos o parâmetro de fluxo elíptico v2, em função da pseudorapidez η, do momento transversal pt e da centralidade da colisão. Encontramos que v2, em função de η, reproduz a forma característica dos dados experimentais, apresentando um máximo em η = 0 e diminuindo conforme |η| aumenta. Obtivemos, também,
Publicado em: 2006
-
11. Effect of hydrodynamic interaction on the motion of a rotating body
The hydrodynamic interaction between two bodies with rotational motion through an inviscid and incompressible fluid is investigated theoretically. The dynamical behavior of an elliptic cylinder moving around a fixed circular cylinder is described first based on the dynamical equations of motion in the plane of motion. In a relative coordinate system moving w
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-12
-
12. Probing a color glass condensate in high energy heavy ion collisions
At very high energies, the partons in the nuclear wavefunction form a color glass condensate. Since the occupation number of partons in the color glass condensate is large, classical methods can be used to compute multi-particle production in the initial instants of a high energy heavy ion collision. Non-perturbative expressions are derived relating the dist
Brazilian Journal of Physics. Publicado em: 2003-06