[math-ias] CANCELLED: IAS HET Seminar - Monday, March 27 - 2:30 PM - Bloomberg Lecture Hall & Zoom - "The Cosmic Neutrino Background (CνB): Its Distribution on the Surface of the Earth and its Manipulation by Laboratory-Scale Diffraction Gratings" - Savas Dimopoulos, Stanford

[Lisa Fleischer]

THIS SEMINAR HAS BEEN CANCELLED AND WILL BE RESCHEDULED 



Monday , March 27, 2023 - IAS High Energy Theory Seminar 

"The Cosmic Neutrino Background (CνB): Its Distribution on the Surface of the Earth and its Manipulation by Laboratory-Scale Diffraction Gratings" 

Location: Bloomberg Lecture Hall (IAS) & Zoom 

Zoom Link: [ https://theias.zoom.us/j/84116605050?pwd=VHV6VkRUM3hkM2dFSlo2QWJiUWtPdz09 | https://theias.zoom.us/j/84116605050?pwd=VHV6VkRUM3hkM2dFSlo2QWJiUWtPdz09 ] 

Time: 2:30 PM 

Speaker: Savas Dimopoulos, SITP, Stanford University 

Abstract: The CνB is a cosmological relic analogous to the CMB, and contains information about the universe before it was one-second-old. Reflection of relic neutrinos from the surface of the Earth creates a significant local neutrino-antineutrino asymmetry in a shell seven meters thick around the Earth's surface. This asymmetry far exceeds the expected primordial lepton asymmetry. The resulting gradient of the net neutrino density evades the forty-year-old “no-go” theorem on the vanishing of O(G_Fermi) neutrino forces on matter. 

These forces can be further enhanced by using 1-100 meter structures with shape reminiscent of a sea-urchin: they consist of rods of width w and length L>>w periodically arranged on the surface of the sphere of radius R~L. Such a structure functions as a diffraction grating for relic neutrinos and the induced neutrino-antineutrino asymmetry at its center may point to a new class of experiments to detect the CνB in a laboratory setting. At the same time, such structures can be used to similarly manipulate dark matter. 
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Lisa Fleischer
Academic Assistant
School of Natural Sciences
Institute for Advanced Study
1 Einstein Drive
Princeton, NJ 08540 [ mailto:lisa at ias.edu | lisa at ias.edu ] 




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