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<p style="text-align: center;" align="center"><span style="font-size: large;"><strong><span style="text-decoration: underline;">SEMINARIOS DEL IFLP y DEL DEPARTAMENTO</span></strong></span></p>
<p style="text-align: center;" align="center"><span style="font-size: large;"><strong><span style="text-decoration: underline;">JUEVES 31 de MARZO – 15 hs</span></strong></span></p>
<p style="text-align: center;" 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: left;" align="center"><strong><span style="text-decoration: underline;"></span></strong><strong><span style="text-decoration: underline;">TÍTULO</span></strong><strong>: </strong><strong>"Entropy and Cosmic Rays: The Origin of the Broken Power Law Spectrum and Ruling out Large Extra Dimensions Beyond LHC Energies"</strong></p>
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<pre><strong><span style="text-decoration: underline;">EXPONE</span></strong><strong>:</strong><strong> John Swain. Northeastern University, Boston USA</strong></pre>
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<pre><strong style="font-family: Verdana, Geneva, sans-serif;"><span style="text-decoration: underline;">Resumen:</span></strong></pre>
<p style="text-align: left;"><strong><span style="text-decoration: underline;"></span></strong><strong> A long-standing puzzle in cosmic ray physics has been the nature<span style="text-decoration: underline;"> </span>of the spectrum, </strong></p>
<p style="text-align: left;"><strong>which is very well modeled by a broken power law<span style="text-decoration: underline;"></span></strong></p>
<p style="text-align: left;"><strong>with differing exponents, both close to -3, above and below the "knee".</strong></p>
<p style="text-align: left;"><strong>We show that a rather simple hadronic evaporation model reproduces</strong></p>
<p style="text-align: left;"><strong>the correct exponents, and the location of the knee without any free</strong></p>
<p style="text-align: left;"><strong>parameters. The model is predictive, with some successful predictions</strong></p>
<p style="text-align: left;"><strong>already and has broader implications for nuclear physics and particle</strong></p>
<p style="text-align: left;"><strong>astrophysics. Similar reasoning is also applied to rule out large extra</strong></p>
<p style="text-align: left;"><strong>dimensions beyond LHC energies using UHECR data.</strong></p>
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