<div dir="ltr"><p style="font-size:12.8px"><font face="arial, helvetica, sans-serif">Estimados,</font></p><p style="font-size:12.8px"><font face="arial, helvetica, sans-serif">Agradecemos la difusión del <span class="gmail-il">anuncio</span> del próximo coloqu<span class="gmail-m_-783468885696854435gmail-m_-167443931672407118gmail-m_2645097548491923312il"><span class="gmail-il">io</span></span> del Ciclo de Coloquios y <span class="gmail-m_-783468885696854435gmail-m_-167443931672407118gmail-m_2645097548491923312il"><span class="gmail-il">Seminarios</span></span> que se organizan el Instituto de Física La Plata y el Departamento de Física. </font></p><p style="font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif;font-size:12.8px">Se adjunta material para difundir en carteleras.</span></p><p style="font-size:12.8px"><span style="font-size:12.8px">Saludos cordiales,</span><br style="font-size:12.8px"><span style="font-size:12.8px">Virginia Manías</span><br style="font-size:12.8px"><span style="font-size:12.8px">Secretaria Científica del IFLP</span><span style="font-family:arial,helvetica,sans-serif;font-size:12.8px"><br></span></p><p class="MsoNormal" style="text-align:center"><b><u><span lang="ES" style="font-family:arial,sans-serif"><br></span></u></b></p><p class="MsoNormal" align="center" style="text-align:center"><b><u><span lang="ES" style="font-family:arial,sans-serif"><br></span></u></b></p><p class="MsoNormal" align="center" style="text-align:center"><b><u><span lang="ES" style="font-family:arial,sans-serif">COLOQUIO  DEL IFLP
y DEL DEPARTAMENTO</span></u></b></p>

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<p class="MsoNormal" align="center" style="text-align:center"><b><u><span lang="ES" style="font-family:arial,sans-serif">DÍA Y HORARIO ESPECIALES: </span></u></b><b><u><span style="font-family:arial,sans-serif">JUEVES 2 de MARZO –
10:30 hs<span></span></span></u></b></p>

<p class="MsoNormal" align="center" style="text-align:center"><b><u><span lang="EN-US" style="font-family:arial,sans-serif">AULA CHICA<span></span></span></u></b></p>

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<p class="MsoNormal"><b><u><span lang="EN-US" style="font-family:arial,sans-serif">TÍTULO</span></u></b><b><span lang="PT-BR" style="font-family:arial,sans-serif">: </span></b><b><span lang="EN-US" style="font-family:arial,sans-serif">"Cosmic strings - a window to the very
early universe?"</span></b><b><span lang="EN-US" style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span></span></span></b></p>

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<p class="MsoNormal" style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><b><u><span lang="EN-US" style="font-family:arial,sans-serif">EXPOSITOR:</span></u></b><b><span lang="EN-US" style="font-family:arial,sans-serif"> </span></b><span class="gmail-Ninguno"><b><span lang="PT-BR" style="font-family:arial,sans-serif">Prof. Betti Hartman</span></b></span><span class="gmail-Ninguno"><b><span lang="PT-BR"><span></span></span></b></span></p>

<p class="MsoNormal" style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span class="gmail-Ninguno"><b><i><span lang="ES-TRAD">Universidade de Sao Paulo (Sao Carlos),
Brasil</span></i></b></span></p>

<h1><font size="2"><u><span lang="EN-US" style="font-family:arial,sans-serif">Resumen:</span></u><span lang="EN-US" style="font-family:arial,sans-serif;font-weight:normal"> </span><span lang="EN-US" style="color:black;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;font-weight:normal">Topological defects (aka
topological solitons) appear in field theory models with spontaneous
symmetry breaking and a non-trivial vacuum manifold. Cosmic strings are
created whenever a U(1) symmetry gets spontaneously broken and are the
topological defect that seems most important from the point of view of
cosmological applications. There are several reasons for this: on the one
hand, it is believed that cosmic strings might be linked to the fundamental
strings of String theory and on the other, essentially all models that try
to embed the Theory of Inflation into the scheme of Grand Unification predict
the production of cosmic strings. Furthermore, the analysis of recent Cosmic
Microwave Background (CMB) data suggests that cosmological models containing
cosmic strings provide a viable fit to both the temperature as well as
polarization anisotropy spectra. I will discuss the properties of cosmic
strings and explain why - with high precision cosmological data - they provide
an interesting testing ground for physics at very high energies and hence the
primordial universe. </span></font><span class="gmail-Ninguno"><span lang="EN-US" style="font-size:16pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span></span></span></span></h1>

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