Hadrons
Mostrando 25-36 de 76 artigos, teses e dissertações.
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25. Distribution of hyperons in 200A GeV Au-Au in smoothed particle hydrodynamics
The transverse momentum distributions of hadrons in 200GeV Au-Au collisions at RHIC are calculated using the smoothed particle hydrodynamics code SPheRIO. They are compared with data from STAR and PHOBOS Collaborations. By employing an equation of state which explicitly incorporates the strangeness conservation and introducing strangeness chemical potential
Braz. J. Phys.. Publicado em: 2007-06
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26. Inhomogeneities in the freeze-out of relativistic heavy-ion collisions
An inhomogeneous decoupling surface of hadrons produced in relativistic heavy-ion collisions may occur, if the expanding hot and dense matter passes through a first order phase transition. We show that due to the non-linear dependence of the particle densities on the temperature and baryon-chemical potential such inhomogeneities should be visible even in the
Braz. J. Phys.. Publicado em: 2007-06
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27. Integral energy spectra of hadrons induced by one-single nucleon by the method of characteristics
Hadron energy spectra induced by one-single nucleon are obtained solving diffusion equations by the method of characteristics. Our solutions are a generalization of earlier papers that allow us to calculate hadron fluxes including the energy dependence of the interaction lengths and inelasticities. A comparison with the integral hadron spectra of the so-call
Brazilian Journal of Physics. Publicado em: 2007-06
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28. From RHIC to LHC: a relativistic diffusion approach
We investigate stopping and particle production in heavy-ion collisions in a Relativistic Diffusion Model (RDM). Using three sources for particle production, the energy- and centrality dependence of rapidity distributions of net protons, and pseudorapidity distributions of charged hadrons in heavy systems at RHIC energies are precisely reproduced in the anal
Braz. J. Phys.. Publicado em: 2007-06
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29. Jet quenching measurements at RHIC
Experimental observation of jet quenching in ultra-relativistic heavy-ion collisions is one of the most remarkable discoveries at RHIC. High-pT hadron suppression, disappearance of back-to-back jets, and strong away-side modification at intermediate to low pT have provided us many insights into the matter created at RHIC. Particularly, angular correlations h
Braz. J. Phys.. Publicado em: 2007-06
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30. Space-time and hadrons
The hadronic structure is investigated in terms of a recently proposed theory which considers the effect of the strong interaction in the space-time description. From the equations, the masses of the particles may be calculated, and quark confinement appears as a natural result, without the need of confining potentials. Some properties of the considered part
Brazilian Journal of Physics. Publicado em: 2007-03
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31. Role of global and local strangeness neutrality in an inhomogeneous freeze-out approach to relativistic heavy ion collisions
An inhomogeneous decoupling surface of hadrons produced in relativistic heavy-ion collisions may occur, if the expanding hot and dense matter passes through a first order phase transition. We show that due to the non-linear dependence of the particle densities on the temperature and baryon-chemical potential such inhomogeneities should be visible even in the
Brazilian Journal of Physics. Publicado em: 2007-03
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32. Confinement in the 3-dimensional Gross-Neveu model at finite temperature
We study the N-component (2+1)-dimensional Gross-Neveu model bounded between two parallel planes separated by a distance L at finite temperature (T). We obtain a closed expression for the large-N effective coupling constant g = g(L,T,lambda). Different behavior depending on the magnitude of the fixed coupling constant lambda is found to lead to a ''critical'
Brazilian Journal of Physics. Publicado em: 2007-03
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33. Modelo de quarks e sistemas multiquarks
A descoberta de muitas partículas, especialmente nos anos 50, com o surgimento de novos aceleradores, causou a busca por um modelo que descrevesse de forma simplificada o conjunto de partículas conhecidas. O modelo de quarks, baseado nas estruturas matemáticas da teoria de grupos, forneceu no início dos anos 60 uma descrição simplificada da matéria ha
Revista Brasileira de Ensino de Física. Publicado em: 2007
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34. Modelo de sacola quiral com superfície difusa : um estudo das propriedades dos hádrons
o modelo de sacola difusa é um modelo hadrônico que possui aspectos tanto do modelo de sacola do MIT (conservação da energia e momentum, energia de vácuo da QCD) quanto dos modelos de potencial relativísticos (confinamento obtido através de um potencial). O modelo desenvolvido também é um modelo quiral, com a propriedade única de que o campo piôni
Publicado em: 2007
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35. Study about hadron interactions in the surface modules and surroundings, at the Pierre Auger Observatory / Estudo sobre as interações de hadrons nos modulos de superficie e adjacencias, do Observatorio Pierre Auger
Este projeto contribui para a caracterização do sinal da passagem da frente de um Chuveiro Atmosferico Extenso no Detector de Superficie do Observatório Pierre Auger. Usando uma simulação do módulo básico do Detector de Superfície, que é um tanque Cherenkov, foi realizado um estudo do sinal depositado para cada tipo de partícula da frente do Chuvei
Publicado em: 2007
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36. Measurements of Strangeness Production at 62.4 GeV / Estudo da produção de estranheza em colisões entre íons pesados relativísticos a &
O principal objetivo deste trabalho foi obter a produção das partículas estranhas K0, e em colisões entre íons pesados relativísticos para ÖsNN = 62.4 GeV, bem como estudar o comportamento sistemático dessa produção em função da energia. Para isso, utilizamos os dados provenientes da colisão de íons pesados relativísticos obtidos pelo experime
Publicado em: 2007