[Physics-grads-open] PASS talk on Monday

[Pooyan Goodarzi]

Hi all,

We will have our next PASS talk on Monday with Michela talking about 
Argon Dark Matter detectors. Please join us on *November 18th (Monday)* 
at *noon* (from 12:00 pm to 1:00 pm) in the *Nebula Room* (PHYS 3027).


*Michela Lai, PhD
*

Monday, 12:00 pm, Nebula Room (PHYS 3027)

*Diving into the unknown: rare event searches with argon detectors*
*
*
Liquid argon, a key player in our quest to unravel the physics beyond 
the standard model, is indeed one of the most sensitive targets for 
GeV-scale dark matter candidates, such as Weakly Interacting Massive 
Particles (WIMPs), as demonstrated by the DEAP-3600 experiment and 
DarkSide-50 experiment. The unique R&D has led to the design of the next 
experiment within the Global Argon Dark Matter collaboration, 
DarkSide-20k, currently under construction at LNGS. Its 50-tonne 
ultra-pure argon target will allow for investigating for the very first 
time in argon dark matter-nucleon cross-section as low as 7.4 x 10^{-48} 
cm^2 for a WIMP mass of 1 TeV/c^2 in a 200 t yr run. At the same time, 
the first calibrations on superheated argon are proceeding within the 
Scintillating Bubble Chamber demonstrator, whose setup at SNOLAB shows a 
projected sensitivity down to 10^{−43} cm^2 at 1 GeV/c^2. On the other 
hand, argon has served as an active veto for the neutrinoless double 
beta decay of 76-Germanium, first in GERDA and now in LEGEND-200, whose 
collaboration recently showed their newest lower limit at 1.0 x 10^{27} 
year, confirming the substantial background rejection possible thanks to 
the argon bath and pushing for the extension of this technology also to 
the future LEGEND-1000, where the argon would be extracted in the URANIA 
plant, aiming for the same mBq/kg argon radioactivity level also at the 
very base of DarkSide-20k's success.


If you’re interested in sharing your work as a speaker, please feel free 
to add your name to the spreadsheet [Google Sheet 
<https://docs.google.com/spreadsheets/d/1N3ncf43jdB6aHYHhyWmyHMycxDg4_phHZXLkQvviO0o/edit?usp=sharing>].


Best,
Pooyan
Physics and Astronomy Student Seminar (PASS)
*
*
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