Physics & Astronomy Colloquium
3:30 PM, Friday, February 5, 2010
Room 155, Chem-Phys Building
Dr. Cristiano Galbiati
Department of Physics
"A Walk on the Dark Side''
There is a wide range of astronomical evidence that the visible stars
and gas in all galaxies, including our own, are immersed in a much
larger cloud of non-luminous matter, typically an order of magnitude
greater in total mass. The existence of this "dark matter'' is
consistent with evidence from large-scale galaxy surveys and microwave
background measurements, indicating that the majority of matter in the
universe is non-baryonic. The nature of this non-baryonic component is
still totally unknown, and the resolution of the "dark matter puzzle''
is of fundamental importance to cosmology, astrophysics, and
elementary particle physics.
Three major lines of research are directing their efforts at
detection of dark matter: the accelerator-based program at the LHC,
indirect searches with satellite-born detectors and direct searches
with detectors operated in deep underground laboratories. The time is
ripe for a discovery, and the new generation of direct searches
promises to probe the most interesting region of parameters for the
dark matter candidates.
I will review and describe a number of current and future
efforts dedicated to a comprehensive direct search for dark matter.
They include operation of the WARP-140 argon-based detector at LNGS,
construction of the DarkSide depleted argon detector, development of
radiopure NaI detectors, and the development of the
"MAX - Multi-Ton Argon and Xenon'' program at the
forthcoming Deep Underground Science
and Engineering Laboratory (DUSEL). All these efforts will also be
capable of probing the recent results published by the CDMS
Refreshments will be served in CP 179 at 3:15 PM