The Cosmic Neutrino Background (C?B): Surface Distribution and Lab Scales Manipulation

Asimina Arvanitaki (Perimeter Institute)

December 04, 2023

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Abstract: The C?B is a cosmological relic analogous to the CMB, and contains information about the universe when it was just one-second-old. I will argue that 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 provides a way-out of a forty-year-old “no-go” theorem on the vanishing of O(G_Fermi) neutrino forces on matter.