[astroseminar at Sapienza] today at 14:00: Christopher G. Tully

[Elia Battistelli]

Title: PTOLEMY: An Underground Experiment to Search for MeV Dark Matter
and the Cosmic Neutrino Background
Speaker: Christopher G. Tully
Institute: Princeton University
Date: Wednesday, 11 October 2017
Time: 2:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza
University

Abstract:
The Universe is dynamical and has expanded by a factor of over one
billion between the present-day and the early thermal epoch known as 
the
neutrino decoupling. The production of relic neutrinos is within 
seconds
of the inflation and heating processes that imprinted the seeds of
future structure formation in the Universe. These early universe relics
have cooled under the expansion of the Universe and are sensed
indirectly through the action of their diminishing thermal velocities 
on
large-scale structure formation. Experimental advances have opened up
new opportunities to directly detect the CNB, an achievement which 
would
profoundly confront and extend the sensitivity of precision cosmology
data. PTOLEMY is a novel method of 2D target surfaces, fabricated from
Graphene, that has unique directional detection capabilities for MeV
dark matter and forms a basis for a future large-scale relic neutrino
detector. The discussion of PTOLEMY focusses on experimental 
challenges,
recent developments and the path forward to discovery sensitivity.

web: https://agenda.infn.it/conferenceDisplay.py?confId=13983


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