Physicists Finally Narrowed Down the Mass of the Tiniest 'Ghost Particle' in the Universe | 8/23/2019 | Rafi Letzter
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We're full of neutrinos all the time. They're everywhere, nearly undetectable, flitting through normal matter. We barely know anything about them — not even how heavy they are. But we do know that neutrinos have the potential to alter the shape of the entire universe. And because they have that power, we can use the shape of the universe to weigh them — as a team of physicists has now done.

Because of physics, the behaviors of the smallest particles alter the behaviors of whole galaxies and other giant celestial structures. And if you want to describe the behavior of the universe, your have to take into account properties of its tiniest components. In a new paper, which will be published in a forthcoming issue of the journal Physical Review Letters, researchers used that fact to back-calculate the mass of the lightest neutrino (there are three neutrino masses) from precise measurements of the large-scale structure of the universe.

Data - Movements - Galaxies - Baryon - Oscillation

They took data about the movements of roughly 1.1 million galaxies from the Baryon Oscillation Spectroscopic Survey , stirred it up with other cosmological information and results from much smaller-scale neutrino experiments on Earth, and fed all that information into a supercomputer.

"We used more than half a million computing hours to process the data," study co-author Andrei Cuceu, a doctoral student in astrophysics at University College London, said in a statement. "This is equivalent to almost 60 years on a single processor. This project pushed the limits for...
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Why do democrats never have to face the reality of what's on the ground, like 2000 years of marriage.
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