AMS: dark matter, unexpected abundance in cosmic rays, it is spoken at Cern. THE PROGRAM
SAY – A three-day entirely dedicated to Ams, the spectrometer Hunter antimatter, opens today at CERN in Geneva. The instrument, installed on the International Space Station from 2011, presents “the new precision measurement of the ratio of the flux of antiprotons and protons in cosmic rays, a result that shows for the first time an unexpected abundance of antiprotons at energies of hundreds of GeV – make known the Italian Space Agency (ASI) and National Institute of Nuclear Physics (INFN) in a statement congiunto-. This measure is complementary to the precision measurement of the flow of anti-electrons (positrons) published by AMS in 2014, which also shows an excess of high-energy antimatter. The unexpected abundance of antimatter in cosmic rays, high energy could be due to a new physical phenomenon of fundamental type. Will also be presented precision measurements of the flow of protons and helium nuclei up to energies exceeding tera electron volt. “
Current models of the interaction of cosmic rays with interstellar matter ordinary “can not explain these new results for Ams: These observations provide important information on the mechanisms of production and propagation of rays cosmici- continues communicated in. Even if you still can not rule out that the results are attributed to the existence of new astrophysical sources or new mechanisms of acceleration and propagation, but the latest results of Ams could be interpreted as the effect of collisions between dark matter particles, and then a possible indirect evidence of its existence and its particulate nature. “
To discuss new results in the event” AMS days at CERN “attended by the most important theoretical and experimental physicists in the world.
“When I founded 20 years ago along with the Nobel laureate Sam Ting experiment Ams I was sure that we would have found something interesting but I would not have never imagined the extraordinary results that we presented today at Cern- says the president of ASI, Roberto Battiston-. Ams is a case of Italian excellence in the field of international research, most of the instruments that allow for the first time the measurement precision of antimatter in cosmic rays have been designed and developed in the laboratories within the University and INFN the domestic industry with the fundamental contribution of ASI. Excess antiprotons presented today at CERN is added to that of positrons published earlier by AMS, making it increasingly plausible that we are observing a new fundamental physical process. “
” We are excited about these results with a framework difficult to interpret in the context of traditional physics ray cosmici- says the president of the INFN, Fernando Ferroni-. This unique detector operating in space and which Italy has contributed very significantly thanks to the role of the domestic industry, is leading us, with the extension of the results already obtained by the detector spatial Pamela and reaching energies much higher , on the threshold of a possible major discovery. We wait with anticipation of future results “.
To understand extensively these results requires a thorough understanding of the process involved in collision of cosmic rays. The comparison of the observations of AMS with the results of the major experiments for the study of cosmic rays (IceCube, Pierre Auger Observatory, Fermi-LAT, Magic, Hess and CTA, JEM-EUSO and ISS-CREAM) will provide important contributions to the understanding of the production of cosmic rays and their propagation mechanisms.
Ams will continue to operate throughout the life of the International Space Station, until 2024, collecting and analyzing a greater volume of data at higher energies and making available a large amount of information.
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