At the particle research center Fermilab in the United States were confirmed in a long prepared attempt for a deviation from the standard model of particle physics. It now has clearer evidence that the so-called muons deviate from theoretical predictions of the standard model, the scientists involved explained. This could indicate that the particles interact with previously unknown particles or force. That border, from which a discovery is spoken in particle physics, did not quite reach them. Nevertheless, the probability is that the quantities are a coincidence, 1 to 40.000.
Small but significant deviation from the predictions
the "Strong evidence of a new physics", How to explain it, come from the so-called "Muon G-2 experiment" At Fermilab (Fermi National Accelerator Laboratory), which explores myones. These elementary particles acknowledge electrons, but are about 200 times so smoother. Normally they are generated, among other things, when cosmic radiation meets the earth’s atmosphere, but particle accelerator as on Fermilab you can produce in coarse quantities. In addition, they react to strong magnetic fields, in a manner predetermined by the so-called G-factor. The konne not only predicted precise predicted, but also measured, explain the responsible persons now. And exactly these two values differ from each other.
The g factor depends not only on the properties of the muons and the respective magnetic field, but also of those subatomic particles which occur on the path of the particle at any time and pass again. With them the muons interact, which gives the G-factor, which in turn betrayed this influence. So now a value has been measured, which deviates significantly from that, predicting the theories. So there must be in the experiment so far unknown particle or force. Even with a transaction experiment Brookhaven National Laboratory that was the case, but now one has confirmed that. The likelihood that it is a coincidence, lying only 1 to 40.000.
So far, only 6 percent of the data collected in the experiment had been evaluated, so there are years of work before the researchers. Although this data already tell us that there is an exciting deviation from the standard model of particle physics, one was learned a lot in the coming years, explained Chris Polly from Fermilab. The research involved in 200 researchers from 35 institutions in seven states, it still has been called. The experiment is financed among other things by the German Research Foundation DFG. The research results were now published in the Physical Review Letters.