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Scientists have watch the rare phenomenon of one type of alien particle transforming into another , which could expose arcanum about the phylogenesis of the universe .
The molecule are two types of chargeless , intimately massless coinage foretell neutrinos , which fall in three savour : muon , electron and tau . In past experiment , physicist have measuredthe change of muon neutrinos to tau neutrinosand electron neutrinos to muon or tau neutrino , but no one has definitively seen muon neutrino twist into electron neutrino .
The MINOS neutrino experiment is located in a cavern half a mile deep in the Soudan Underground Laboratory, Minnesota. A mural of famous scientists is painted onto the rock wall.
Now , two separate experiments — one in Japan and one in Minnesota — have both found evidence for this transmutation as well .
Detecting neutrinos
Scientists of the Main Injector Neutrino Oscillation Search ( MINOS ) experiment at the Department of Energy ’s Fermi National Accelerator Laboratory announce their finding today ( June 24 ) . The result are logical with , and importantly restrain , a measurement reported 10 days ago by the Nipponese Tokai - to - Kamioka ( T2 K ) experimentation , which herald an indication of this eccentric of transformation . [ Strange Quarks and Muons , Oh My ! Nature ’s Tiniest Particles ]
The MINOS study sent a shaft of light of muon neutrinos 450 miles ( 735 kilometers ) through the Earth , from theMain Injector accelerator at Fermilabin Batavia , Ill. , to a 5,000 - ton neutrino detector , located half a mi underground in the Soudan Underground Laboratory in northerly Minnesota .
The neutrino ' slip from Fermilab to Soudan charter about four hundredths of a second , giving the neutrino enough time to convert their identities .
MINOS record a total of 62 negatron neutrino - like result , which is a potential indicant that there were 62 electron neutrinos present at Soudan . If negative muon neutrinos did n’t transform into electron neutrinos , MINOS should have seen only 49 effect . The T2 K experimentation showed 71 such electron - neutrino effect , though the two experimentation use different methods and analysis techniques to look for this rare transformation .
The Libra the Scales of matter
The new determination could have major implications for our savvy of the history of the cosmos . If mu-meson neutrino can transform into electron neutrinos , neutrinos could be the grounds that the Big Bang producedmore matter than antimatter , leading to the universe as it exists today . To work out this whodunit , scientists want to calculate how often different flavors of neutrinos change into each other , and liken that with the pace of change among neutrinos ' antimatter partners , antineutrinos .
If it turns out that the rules of transformation are different between neutrinos and antineutrino , that dissymmetry could help explain why matter vastly outnumbers antimatter in the universe .
MINOS will continue to pile up data until February 2012 . The T2 K experimentation was interrupted in March when the severe quake in Japan damage its muon neutrino informant . Scientists expect to take up operations of the experimentation at the oddment of the twelvemonth .
