[Triumf-seminars] TRIUMF Colloquium today at 14:00

[TRIUMF Seminars]

Date/Time: Thu 2020-09-24 at 14:00

Location:  Remote              

Speaker:   Nirmal Raj (TRIUMF)

Title:     The Reverse Rutherford Era of Dark Matter

Abstract: Dark matter -- the invisible substance that makes up four-fifths of all matter -- is ubiquitous, yet efforts to identify its microscopic nature have proven elusive. As it is known to move at high speeds, a promising approach to detect it is to observe unusual effects of its scattering on well-understood stationary targets, essentially the Rutherford scattering experiment in reverse. I will outline two experiments for the near future: (1) Through scattering, dark matter could set ancient neutron stars on fire, which may be observed by upcoming infrared telescopes such as James Webb and the Thirty Meter Telescope; this would be the most extensive method to date for detecting dark matter. (2) One reason for why dedicated detectors on Earth looking for dark matter particles have found none so far could be that these particles are very dilute, at least kilometres apart. If so, even bigger detectors, such as the liquid scintillator-based neutrino detectors BOREXINO, SNO+, and JUNO, may be repurposed to catch them.

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896 974 261

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