[Todos] TNPP Group visitor's seminar: Germán Gomez-Vargas, 12/05/1015

[daniel.lopez en df.uba.ar]

Hola a todos,

   Mañana  a las 14 hs tenemos el gusto de tener a Germán Gomez-Vargas
contandonos las últimas novedades del satelite Fermi.

   Les cuento que el título de la charla de Germán es:Gamma-ray line
searches with the Fermi-LAT telescope

Y el abstract es:Â Â Â  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.

   Más información sobre las charlas la pueden encontrar en mi página
web, http://users.df.uba.ar/daniel.lopez/, donde ademas pueden encontrar
el  link http://www.theophys.kth.se/~tommy/buenosaires20150428.pdf  para
descargar la charla de Tommy Ohlsson de la semana pasada.

   Â Â Â  Saludos a todos,


                                                                             
Daniel E. LOPEZ-Fogliani

                                                     
          Theoretical Nuclear & Particle Physics (TNPP)

   Â 
--  Daniel E. Lopez-Fogliani  ---------------------------------------
Daniel LOPEZ Departamento de Física Universidad de Buenos Aires and IFIBA
Ciudad Universitaria, Pabellon I 1428 Ciudad de Buenos Aires Argentina
---------------------------------------
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: http://mailman.df.uba.ar/pipermail/todos/attachments/20150511/cfa01ecb/attachment.html