9/8/2023 0 Comments Cern antimatterThe AMS experiment, installed on the International Space Station, is designed to study them before they have a chance to interact with the Earth’s atmosphere. “Over the coming months, AMS will be able to tell us conclusively whether these positrons are a signal for dark matter, or whether they have some other origin.”Ĭosmic rays are charged high-energy particles that permeate space. “As the most precise measurement of the cosmic ray positron flux to date, these results show clearly the power and capabilities of the AMS detector,” AMS spokesperson Samuel Ting says. These results are consistent with the positrons originating from the annihilation of dark matter particles in space, but not yet sufficiently conclusive to rule out other explanations. The data also show no significant variation over time, or any preferred incoming direction. The positron fraction increases from 10 GeV to 250 GeV, with the data showing the slope of the increase reducing by an order of magnitude over the range 20 to 250 GeV. This represents the largest collection of antimatter particles recorded in space. The AMS results are based on some 25 billion recorded events, including 400,000 positrons with energies between 0.5 GeV and 350 GeV (gigaelectronvolts, a unit of energy equal to one billion electron volts), recorded over a year and a half. The AMS paper, to be published in the journal Physical Review Letters, reports the observation of an excess of positrons in the cosmic ray flux. The international team running the Alpha Magnetic Spectrometer (AMS) today announces the first results in its search for dark matter. Samuel Ting, the Thomas Dudley Cabot Professor of Physics at MIT and the spokesman for the international team of researchers running the Alpha Magnetic Spectrometer, also announced these results via webcast. ![]() ![]() The following is adapted from a press release issued today by CERN, the European Organization for Nuclear Research.
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