3/18/2023 0 Comments A neutrino contains very littleTrotta said: “This research provides important new evidence in favour of the current cosmological model, unifying it with fundamental physics theories. The research has important implications for the study of neutrinos, showing that theories of the infinitely large (cosmology) and the infinitely small (particle physics) are in agreement.ĭr. ![]() The discovery, made by combining data produced by the NASA WMAP (Wilkinson Microwave Anisotropy Probe) satellite and the Sloan Digital Sky Survey, confirms the predictions of both the Big Bang theory and the Standard Model of particle physics. Alessandro Melchiorri of La Sapienza University in Rome were able to demonstrate for the first time the existence of ripples of primordial origin in the Cosmic Neutrino Background. Roberto Trotta, Lockyer Fellow of the Royal Astronomical Society at Oxford’s Department of Physics, and Dr. In research to be published in the journal Physical Review Letters, Dr. The Earth is therefore immersed in an ocean of neutrinos, without us ever noticing.Īlthough it is impossible to measure this ‘Cosmic Neutrino Background’ directly with present-day technology, physicists predict that ripples or waves in it have an impact on the growth of structures in the Universe. According to the standard Big Bang model, neutrinos permeate the Universe at a density of about 150 per cubic centimetre. Yet pinning down the physical properties of neutrinos is of paramount importance to scientists attempting to understand the fundamental building blocks of Nature. Neutrinos are elementary particles with no charge and very little mass, which are extremely difficult to study due to their very weak interaction with matter.
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