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ISS DETECTOR GAVE A POSSIBLE SIGNAL OF DARK MATTER
Analysis of 41 billion cosmic rays caught in the particle detector Alpha Magnetic Spectrometer ( AMS ) to the International Space Station, has revealed an unknown phenomenon, which could be a possible dark matter particles, known as the neutralino , reports Phys.org.
The key point of hunting for the mysterious dark matter at the AMS is the ratio of positrons and electrons. Positrons – antimatter is relative to the electrons.
Scientists have noted an increase in the ratio of positrons to electrons, followed by a sharp drop, which may indicate that the dark matter annihilate in the halo of the Milky Way, which lies outside of its central disk of stars and dust, according to Michael Turner, director of the Institute for Cosmological Physics at the Kavli University of Chicago.
If current theoretical models are correct, a massive pool of dark matter – perhaps 1 million light-years across – envelops the visible galaxy, which is about 100,000 light years in diameter.
Visible matter, stars and galaxies make up less than 5 percent of the total mass in the universe. The rest falls on the dark matter and anti-gravity force, which is defined as the dark energy. AMS is looking for evidence of neutralino dark matter, which – if they exist – have to face each other and emit charged particles, which can detect the AMS.
“We did not find definitive evidence of dark matter – said researcher AMS Samuel Ting of the Massachusetts Institute of Technology, a Nobel Prize winner. – Although the results of AMS pointing in the right direction, we still need to measure how quickly falls positron fraction at the highest energy levels to avoid astrophysical sources such as pulsars. ”
The second series of evidence should appear on the basis of further measurements ratio of antiprotons and protons, which can also exclude pulsars as sources of energy.
AMS has been installed on the space station in May 2011. Since then, the unit cost of $ 2 billion has accumulated a mountain of data on the basis of 54 billion events with cosmic rays, 41 billion of which was analyzed. Of these 10 million particles were defined as electrons and positrons.
During the life of the space station AMS is to measure hundreds of billions of cosmic rays. AMS – is not the only tool to hunt for dark matter. The Large Hadron Collider, for example, plans to produce parent and grandparent dark matter particles.Viewing:-163
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