Physicists in Switzerland are on a subatomic hunt that , they hope , will reveal some entirely raw results beyond the limits of their theories .
An experiment at CERN in Geneva , scream NA62 , is design to let scientist watch a rare kind of corpuscle decay . The team , using a whole new method , may have at long last spotted what they ’re looking for .
You ’ve probably pick up of quarks , the building blocks of other subatomic particles . There are six : the common up and down quark cheese , the strange and charm quark cheese , and the rare top and bottom quarks . Protons and neutrons control only up and down quarks .
The NA62 experimentation is essentially a factory designed to manufacture as many of the kaon particle , specifically the K+ salmagundi , as possible . This particle hold an up quark , along with the antiparticle of the unknown quark . It always decay into some combining of other subatomic particle . An specially rarefied , one - in-10 billion termination is that it split up into a neutrino , an antineutrino , and a π˙(an up quark cheese and an anti - down quark , pronounced pi - on . ) .
While the Standard Model predicts that this kind of decomposition exists , it ’s only been spotted a smattering of time , at an older experiment at Brookhaven National Lab on Long Island call E949 . The squad at NA62 thinks they ’ve spotted their first candidate , as presentedat a seminar Tuesday at CERN .
Both E949 and NA62 bring out kappa-meson by hitting a object with a beam of in high spirits - energy protons from an next particle throttle . E949 stops these kaons on another demodulator to measure their decays . NA62 rather eliminate the beam through a sensing element and makes measure while the particles are journey .
The rarity of this decay means that it could be a really good shaft to try out the Standard Model — it would be really obvious if thing were different than foretell . Right now , the Standard Model predicts a 8.4 in 100 billion chance of this decay . Measuring a unlike relative frequency definitively could lead to new constabulary of physics .
The researchers spy a potential instance of this particular kaon decay . Based on their measure , that frequency would be at most 140 in 100 billion . So the Standard Model prediction conform to comfortably in what they actually observed .
Bob Tschirhart , Fermi National Lab chief project officer who worked on E949 , woke up early in the morning Tuesday to watch the webcast about the results . He was impressed . “ They ’re not at a percentage point of scientific signification yet , but they ’ve attest that their technique works , ” he told Gizmodo . “ They have excellent prospect on the timescale of another year . ”
to boot , he note that NA62 has the potential to observe as many as 100 event . Given the one - in - ten billion betting odds , that could bestow the uncertainty in the measurements down by a mint .
Right now , it ’s up to the physicists to make the good mensuration that they can . Then , said Tschirhart , “ it ’s up to nature to chime in whether there ’s new physics . ”
[ CERN ]
CERNParticle physicsPhysicsScience
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