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“If this is confirmed, it would be the biggest discovery in particle physics in recent decades,” Nico Serra told Tages-Anzeiger. Serra is Professor of Experimental Physics at the University of Zurich Physics Institute (UZH) and works at Cern, among other things, with the LHCb detector of the Large Hadron Collider (LHC). Serra also intervenes: “We still have very little measurement data to know whether the observed deviation from the standard model of particle physics really exists or not.”
The irregularity in focus was first observed at CERN according to a communication on Tuesday 2014: when mesons disintegrate into electrons and muons, the result was not, as the theory requires, one. But the discrepancy was not as clear as it is now, according to Serra. Meanwhile, the same deviations from the expected standard have been found in Japan and the US.
If the deviation is confirmed, this would involve physics beyond the standard model, it says in the statement. A new fundamental force would be conceivable in addition to the four basic forces: gravitation, electromagnetism, weak interaction that is responsible for radioactivity, and strong interaction that holds matter together.
In the hadron collider’s grand beauty experiment (LHCb experiment), located in the center, so-called beauty quarks are created when high-energy proton beams collide in the particle accelerator. They disintegrate practically immediately on the spot. Researchers reconstruct the properties of short-lived composite particles based on their decomposition products.
According to the established laws of particle physics, the so-called standard model, the beauty quarks should decay to a final state with electrons or muons, the much heavier siblings of electrons, with the same probability. In some decays, however, the measurement contradicted this theorem.
In elementary particle physics, observations become true discoveries when the probability of an error, including all known errors, is less than one in three million, or 0.00003 percent. “So it is still too early to reach a final conclusion,” Serra said in the statement.
“But the LHCb collaboration has all the prerequisites to clarify the possible existence of effects of new physics on decays of beauty quarks. What we need for this are many more measures ”,
The LHCb “is an experiment to investigate what happened after the Big Bang so that matter could survive and build the universe we live in today,” says CERN’s website.
Posted: 23.03.2021, 13:47