The new elementary particle discovered last summer, which helps explain the origin of mass, “is looking more and more like a Higgs boson”, announced yesterday the European Laboratory for Particle Physics (CERN) , near Geneva, summarizing recent data submitted by its scientists. Now have analyzed two and half times more records great accelerator LHC than those in July and, by its nature, the new boson fits even better with the Standard Model that describes the elementary particles and their interactions.
However, CERN warns that the issue is not settled yet because it can not be completely ruled out other like particle Higgs boson expected. It could be the “lightest bosons several theories predicting that go beyond the Standard Model, for the answer will have to wait,” says the European laboratory. The leaders of the two major LHC experiments, ATLAS and CMS, have presented recent data on annual physics conference Moriond held in La Thuile (Italy).
Luis Ibáñez, professor of theoretical physics at the Universidad Autónoma de Madrid (UAM) , explains why doubts persist: “In the case of supersymmetric theories, there are three such particles and the lightest of them seems the Higgs boson in the Standard Model. ” But he is inclined to think that what has been discovered so far at CERN is expected Higgs boson. “There is no evidence that it is the other option and the rest of the data analyzed LHC still no sign of supersymmetric particles.” The same view is Luis Alvarez-Gaume, a theoretical physicist at CERN: “The truth is that \ [the new particle \] is looking more and more to the standard Higgs but experimental physicists are very cautious and want to watch all channels disintegration and to compare with theoretical predictions, and there is still a discrepancy. “
The supersymmetric be a new type of elementary particles predicted by supersymmetry theories called, that go beyond the Standard Model, and many physicists expect that the trail appears at the LHC. So far they have not made an appearance.
The new and already famous Higgs particle, physicists searched for half a century, was presented at CERN last July, but physicists warned that while it was a new type boson particle properties pointing to the Standard Model Higgs, had to analyze more data to be sure of its identity. And the search is still ongoing. “Preliminary results with the entire data set of 2012, are superb and, for me, it is clear that we are dealing with a Higgs boson, although we still have a long way to go to know what type it is,” he said the Moriond conference, Joe Incandela, CMS spokesperson.
Alberto Casas, a scientist at the Institute of Theoretical Physics (CSIC-UAM) gives an example to understand what is the Higgs boson and how it looks: “Particles having the acquire mass by interacting with the Higgs field called that to do so easy to understand, is like an invisible gel permeates the universe, when the gelatin is stirred, forming waves and waves, according to the laws of quantum mechanics are also particles, in this case Higgs bosons. For stirring in the laboratory the Higgs field turn to particle collisions at high energy in the LHC “.