Exploring the Mystery of Dark Matter
Date: Thursday, January 17th, 2019
Location: 100 Willamette Hall
Speaker: Rakshya Khatiwada, Fermilab
Abstract: Very few mysteries in our current picture of the universe are bigger than the puzzle of dark matter. Recently the QCD axion — a weakly interacting, sub-eV particle — has been in the limelight as a cold dark matter candidate which also enjoys compelling theoretical motivation as a possible solution to the strong CP problem. This talk will give an overview of modern axion searches along with a detailed discussion of the most sensitive experiment to probe the QCD axion to date, ADMX. In particular, it will focus on ADMX’s recent success in reaching the so-called DFSZ sensitivity—a decade long goal sought by axion experimenters — and its newest limits covering axion mass ranges of 2.66 to 2.81 μeV. The limits ADMX has placed in this range have crucial implications for the future direction of on-going dark matter searches as I will outline.
Host: Stephanie Majewski
All attendees are invited to attend a colloquium reception in the Willamette Hall, Paul Olum atrium at 3:40pm.