An exorbitant and dubious space-based cosmic ray identifier has discovered conceivable indications of dark matter, the undetectable stuff thought to supply a large portion of the universe’s mass. Or on the other hand so says Samuel Ting, a particel physicist at the Massachusetts Institute of Technology in Cambridge and pioneer of the Alpha Magnetic Spectrometer (AMS), which is roosted on the International Space Station (ISS).
In 2014, AMS scientists revealed a surprising motion of positrons that kicked in at energies over 10 giga-electron volts (GeV) and appeared to blur by around 300 GeV. The abundance could emerge out of dark matter particles impacting and obliterating each other to deliver electron-positron sets, and the energy of the falloff may point to the mass of the dark matter particles. Presently, with three fold the number of information, AMS specialists have unmistakably settled that energy cutoff. The positron abundance begins at 25 GeV and falls forcefully at 284 GeV, the 227-part AMS group detailed in Physical Review Letters. “It’s critical in light of the fact that you do begin to see a turnaround” in the energy range, Olinto says. The cutoff is steady with substantial dark matter particles with a mass of around 800 GeV, the scientists report.
AGUILAR ET AL., PHYS. REV. LETT.122, 041102, (2019)