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Hola a todos,<br>
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<p> <br>
Recuerden que hoy a las 14 hs tenemos el gusto de tener a Germán
Gomez-Vargas con las últimas novedades del satélite Fermi. La
charla será en castellano. <br>
<br>
Título de la charla de Germán: <span>Gamma-ray line searches
with the Fermi-LAT telescope</span></p>
<p><span>Abstract: Dark matter decay or annihilation may
produce monochromatic signals in the gamma-ray energy range.
In this presentation I will argue that there are strong
theoretical motivations for studying these signals in the
framework of gravitino dark matter decay and present the
results of a search for gamma-ray spectral lines from 100 MeV
to 10 GeV with 5.2 years of Fermi-LAT data. In contrast to
previous line searches at higher energies, the sensitivity of
the present search is dominated by systematic uncertainties
across most of the energy range considered. We estimate the
size of systematic effects by analysing the flux from a number
of control regions, and include the systematic uncertainties
consistently in our fitting procedure. I will also present
preliminary results on a line search in a broad energy range
200 MeV - 500 GeV, the main improvement relative to previous
works is the use of 5.8 years of data reprocessed with the
Pass 8 event-level analysis. In addition I will present new
results on the previously reported tentative detection of a
line at 133 GeV using the new Pass 8 data.</span></p>
<br>
Más información sobre las charlas la pueden encontrar en mi página
web, <font color="#999999"><a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://users.df.uba.ar/daniel.lopez"><font
color="#666666">http://users.df.uba.ar/daniel.lopez</font></a>/,</font>
donde ademas pueden encontrar el link <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.theophys.kth.se/%7Etommy/buenosaires20150428.pdf">http://www.theophys.kth.se/~tommy/buenosaires20150428.pdf</a>
para descargar la charla que ya tuvo lugar de Tommy Ohlsson.<br>
<br>
<br>
Saludos a todos,<br>
<br>
<br>
<br>
Daniel E. LOPEZ-Fogliani<br>
Theoretical Nuclear & Particle Physics (TNPP)
<pre class="moz-signature" cols="72">--
Daniel E. Lopez-Fogliani
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Daniel LOPEZ
Departamento de Física
Universidad de Buenos Aires and IFIBA
Ciudad Universitaria, Pabellon I
1428 Ciudad de Buenos Aires
Argentina
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