New analyses of data from Space Station’s AMS experiment show signs of elusive cosmic mass
Whiffs of dark matter may be blowing in on a cosmic ray breeze. Antiprotons streaming down on Earth from space could be hinting at the existence of the invisible substance, two teams of researchers suggest.
Particles known as cosmic rays are constantly whizzing through space. These particles include protons and their antimatter partners, antiprotons. While antiprotons are produced in run-of-the-mill processes like particle collisions, additional ones could theoretically be birthed when dark matter particles annihilate one another.
In two papers in the May 12 Physical Review Letters, the two teams — one from Germany; the other from China and Taiwan — analyzed antiprotons detected by the Alpha Magnetic Spectrometer, located on the International Space Station. When dark matter’s