nyt 10 - would be finding the identity of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Akber Malik NYT 10: At a Mine’s Bottom, Hints of Dark Matter It is possible that, in a mine in Minnesota, an international team of physicists found the first hints of dark matter thought to exist through the cosmos. Scientists say that there is more than a 20 percent chance that the pulses of heat deposited by the particles over the course of two years were caused by fluctuations in the background radioactivity of the mine; thus, the results cannot be considered definitive. A University of Michigan physicist called the results “likely” detection of dark matter, not proof. Testing is going underway at detectors in Illinois and in California to determine if the particles do, in fact, represent dark matter. If so, it would mean that astronomers
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: would be finding the identity of the “invisible” material accounting for roughly 25 percent of the universe. Also, it would constitute the first evidence of “supersymmetry”, a phenomenon required to validate String Theory. This find is nearly a mile and a half underground in Minnesota, in an old iron mine in Soudan so it is shielded from cosmic rays. Temperatures in the detectors can be as low as one-hundredth of a degree Kelvin. When a particle hits a detector, it produces an electrical charge and deposits bits of heat, and each bit is independently measured. By comparing the amounts of charge and heat left behind, physicists can tell what sorts of particles they are looking at....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online