<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body style='font-size: 8pt; font-family: Arial,Helvetica,sans-serif'>
<p><br /></p>
<div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">********************************************<br /> Secretaría Departamental de Física<br /> <a href="mailto:secre2@fisica.unlp.edu.ar">secre2@fisica.unlp.edu.ar</a><br /> Cecilia Cafiero / Alejandro Chiquino<br /> Facultad de Ciencias Exactas<br /> Universidad Nacional de La Plata<br /> ********************************************</div>
</div>
<p><br /></p>
<p>-------- Mensaje original --------</p>
<table border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<th align="right" valign="baseline" nowrap="nowrap">Asunto:</th>
<td>XVI jornada de Cosmología: Cosmo@ar en La Plata</td>
</tr>
<tr>
<th align="right" valign="baseline" nowrap="nowrap">Fecha:</th>
<td>2025-10-06 18:27</td>
</tr>
<tr>
<th align="right" valign="baseline" nowrap="nowrap">Remitente:</th>
<td>Carlos Argüelles <carlosarguelles80@hotmail.com></td>
</tr>
<tr>
<th align="right" valign="baseline" nowrap="nowrap">Destinatario:</th>
<td>Secretaría de Ciencia y Técnica <secyt@fcaglp.unlp.edu.ar>, Asistentes de Secretaria de Fisica <secre2@fisica.unlp.edu.ar></td>
</tr>
</tbody>
</table>
<p><br /></p>
<!-- html ignored -->
<p><br /></p>
<!-- head ignored --><!-- meta ignored -->
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Hola Betina, Alejandro</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Les quería pedir por favor de circular desde mañana este mail de recordatorio del cosmo@ar a una semana de la fecha. Gracias.</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">XVI jornada de Cosmología: Cosmo@ar (Organizadores: Carlos Argüelles (UNLP-CONICET), Gabriel R. Bengochea (IAFE), Diana López Nacir (IFIBA-UBA), Martín Makler (ICIFI/UNSAM - CBPF) </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Las jornadas incluyen charlas invitadas e intervalos para discusiones, las cuales se realizan periódicamente en distintas instituciones del País. La finalidad principal de las mismas es motivar la comunicación e interacción entre los distintos grupos.</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Fecha y lugar: <strong>Martes 14 de Octubre. Salon Meridiano de la FCAG (La Plata), de 10 a 16 hs</strong>. Como llegar:<a id="OWA5756d753-81b8-ae48-5b62-7c68ea6e1f4a" class="OWAAutoLink" title="https://share.google/Zj0hvCwVIp9OAJyBb" href="https://share.google/Zj0hvCwVIp9OAJyBb" rel="noopener noreferrer">https://share.google/Zj0hvCwVIp9OAJyBb</a></div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Cronograma </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">10:00 - 10:45 hs: Nicolas Grandi (IFLP/UNLP)</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<p class="elementToProof" style="direction: ltr; margin-top: 0px; margin-bottom: 19.2px;"><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Title: De Sitter geometric inflation from dynamical singularities</span></p>
<p class="elementToProof" style="direction: ltr; margin-top: 0px; margin-bottom: 19.2px;"><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Abstract: Within the framework of geometric inflation, where the Friedmann equation is modified to incorporate an infinite series of higher curvature corrections arising from quantum fluctuations, we describe the emergence of a de Sitter inflationary phase near the poles of an arbitrary dynamical function. Our analysis is quite general and does not depend on any specific choice of cosmological dynamics.</span></p>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">10:45 - 11:15 hs: Intervalo de café</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">11:15 - 12 hs: Franciso Plaza (FCAG/UNLP)</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Title: Unimodular Gravity Cosmology: Constraints from DESI DR2 and Complementary Observations</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Abstract: Motivated by the recent baryon acoustic oscillation measurements from the DESI DR2 collaboration, in this talk we present an extended analysis of a cosmological model based on holographic dark energy within the framework of Unimodular Gravity (UG). In this setting, UG allows us to account for the accelerated expansion of the Universe through the modified gravitational dynamics themselves, while permitting spacetime variations in the effective cosmological constant. We confront the model with a wide range of observations, from Type Ia supernovae and baryon acoustic oscillations (DESI DR2) to quasars and Planck CMB data. We will discuss whether this framework alleviates the Hubble tension and how it compares to the standard $\Lambda$CDM model in terms of Bayesian model selection.</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">12 - 13:30 hs: Almuerzo</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Bloque tarde</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">13:30 - 14:15 hs: Ilya L. Shapiro (Universidade Federal de Juiz de Fora, MG, Brazil)</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Title:</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Cosmological Constant and Renormalization Group Running in the IR</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Abstract:</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">The Cosmological Constant (CC) Problem emerges in Quantum Field Theory (QFT) in curved space-time owing to the enormous magnitude of the induced vacuum energy. The CC Problem looks rather complicated, such that its solution from the first principles is not a realistic perspective, even in a far future. After reviewing the fundamental CC problem, we consider the possibility of a slightly variable CC because of the quantum effects of matter fields. There is no way to calculate relevant quantum contributions directly in the framework of available QFT methods. However, three different approaches converge to the unique form of the possible running of CC and the effective Newton constant G in the low-energy limit. Assuming covariance, or the standard quadratic decoupling of massive fields at low energies, or using dimensional arguments, we arrive at the unique form of a running, which leads to the relatively simple cosmological model with potentially observable predictions. A very recent result is that the possible running, with a single phenomenological parameter may be useful in alleviating various tensions existing nowadays in cosmology. </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">14:15 - 15:15 hs: Intervalo de café</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">15:15 - 16:00 hs: Sebastián Franchino-Viñas (IFLP)</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Title: Quantum physics in strong fields<br /> <br /> Abstract: Quantum field theory in the presence of strong backgrounds, be them electromagnetic or gravitational, is acquiring a central rôle in the understanding of the primordial universe and laser laboratory experiments. The interaction of quantum fields with classical backgrounds gives rise to a variety of fundamental effects. In such extreme environments, we will describe the prediction and current quest of effects such as birefringence and pair creation.</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Saludos</div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;"> </div>
<div class="elementToProof" style="direction: ltr; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: black;">Carlos</div>
<div class="elementToProof" style="font-family: 'Calibri', 'Helvetica', sans-serif; font-size: 12pt; color: #000000;"> </div>
</body></html>