4/7/2023 0 Comments Sgdq boson x![]() ![]() “We follow the clues and leave no stone unturned, so we’ll figure out what this means. However, he added: “If you’re going to say something as big as we’ve broken the standard model of particle physics, and there’s new particles out there to discover, to convince people of that you probably need more than one measurement from more than one measurement.”ĬDF co-spokesperson David Toback said: “It’s now up to the theoretical physics community and other experiments to follow up on this and shed light on this mystery.”Īnd after a decade of measurements, Kotwal isn’t done yet. “If this is real, and not some systematic bias or misunderstanding of how to do the calculations, then it’s a huge deal because it would mean there’s a new fundamental ingredient to our universe that we haven’t discovered before.” They found it was different than the standard model’s prediction by seven standard deviations, which are also called sigma.Ĭliff said that if you were flipping a coin, “the chances of getting a five sigma result by dumb luck is one in three-and-a-half million”. They compared it to measuring the weight of a 350kg (800 pound) gorilla to within 40 grams (1.5 ounces). The CDF scientists said they had determined the W boson’s mass with a precision of 0.01% – twice as precise as previous efforts. “Extraordinary claims require extraordinary evidence,” he said. ![]() Jan Stark, physicist and director of research at the French CNRS institute, said “this is either a major discovery or a problem in the analysis of data”, predicting “quite heated discussions in the years to come”. “In this framework of clues that there are missing pieces to the standard model, we have contributed one more, very interesting and somewhat large clue,” Kotwal said. On top of that, “a few fissures have recently been exposed in the standard model”, physicists said in a companion Science article. For example, it doesn’t account for dark matter, which is thought to make up 95% of the universe. “It’s a like a house of cards, you pull on one bit of it too much, the whole thing comes crashing down,” Cliff said.īut the standard model is not without its problems. Harry Cliff, a particle physicist at Cambridge University who works at the Large Hadron Collider, said the standard model was “probably the most successful theory and scientific theory that has ever been written down – it can make fantastically precise predictions”.īut if those predictions were proved wrong, it could not merely be tweaked. The Tevatron stopped running in 2011, but the scientists at the Collider Detector at Fermilab (CDF) have been crunching numbers ever since. It was the world’s highest-energy particle accelerator until 2009, when it was supplanted by the Large Hadron Collider near Geneva, which famously observed the Higgs boson a few years later. These collisions – made by smashing the particles together at mind-bending speeds to study them – were made by the Tevatron collider in the US state of Illinois. Ashutosh Kotwal, a physicist at Duke University who led the study, said that the result had taken more than 400 scientists over 10 years to record and scrutinise a “dataset of around 450 trillion collisions”.
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