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<p style="text-align: left;" align="center"><strong style="text-align: left;">Estimados:</strong></p>
<p style="text-align: left;" align="center"><span><strong>Agradecemos la difusión del anuncio del próximo <span class="il">seminario</span> del C<strong>iclo de Coloquios y <span class="il">Seminarios</span> que se organizan en el Instituto de Física La Plata</strong>/ <strong>Departamento de Física.</strong></strong></span></p>
<p style="text-align: left;" align="center"><strong>Se adjunta </strong><strong>material para difundir en carteleras.</strong></p>
<p style="text-align: left;" align="center"><strong>Saludos,</strong></p>
<p style="text-align: left;" align="center"><strong>Administración IFLP</strong></p>
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<p align="center"><span style="font-size: large;"><strong><span style="text-decoration: underline;">SEMINARIOS DEL IFLP y DEL DEPARTAMENTO</span></strong></span></p>
<p align="center"><span style="font-size: large;"><strong><span style="text-decoration: underline;">MARTES 31 de MAYO a las 11hs</span></strong><strong><span style="text-decoration: underline;"></span></strong></span></p>
<p align="center"><span style="font-size: large;"><strong><span style="text-decoration: underline;">AULA CHICA</span></strong></span></p>
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<p style="text-align: justify;"><span style="font-size: medium;"><strong><span style="text-decoration: underline;">TÍTULO: </span></strong><strong> </strong><strong>A Lorentz invariant velocity distribution of a relativistic gas</strong><strong> </strong></span></p>
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<pre><span style="font-size: medium;"><strong><span style="text-decoration: underline;">EXPONE</span></strong><strong>:</strong><strong> </strong><strong>Evaldo M. F. Curado. Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil</strong></span></pre>
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<p style="text-align: justify;"><span style="font-size: medium;"><strong><span style="text-decoration: underline;">Resumen:</span></strong> We examine the problem of the relativistic velocity distribution in a 1-dim relativistic gas in thermal equilibrium. We use numerical simulations of the relativistic molecular dynamics for a gas with two components, light and heavy particles. However in order to obtain the numerical data our treatment distinguishes two approaches in the construction of the histograms for the same relativistic molecular dynamic simulations. The first, largely considered in the literature, consists in constructing histograms with constant bins in the velocity variable and the second consists in constructing histograms with constant bins in the rapidity variable which yields Lorentz invariant histograms, contrary to the first approach. For histograms with constant bins in the velocity variable the numerical data are fitted accurately by the Jüttner distribution which is also not Lorentz invariant. On the other hand, the numerical data obtained from histograms constructed with constant bins in the rapidity variable, which are Lorentz invariant, are accurately fitted by a Lorentz invariant distribution whose derivation is discussed in this presentation. The histograms thus constructed are not fitted by the Jüttner distribution (as they should not). Our derivation is based on the special theory of relativity, the central limit theorem and the Lobachevsky structure of the velocity space of the theory, where the rapidity variable plays a crucial role. For v^2/c^2 << 1 and k_{B}T/(m_0 c^2) <<1 the distribution tends to the Maxwell–Boltzmann distribution. </span></p>
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