On Thursday, researchers revealed the most accurate measurement so far from neutrino, which reduced the possible maximum of the ghost mass of the material that permeates our world.
The result, Published In the magazine, it does not specify the microscopic mass of neutrino, only the upper limit. But the result helps in making physicists closer to knowing what is wrong in the alleged standard model, and their best-and if incomplete-in the laws that govern the world without atomic. One of the ways that physicists know is not completely accurate is that it indicates that neutrino should not have any mass at all.
In the great scales, learn more about the neutrons of universe scientists to fill their fog image of the universe, including how to collect galaxies together and What affects expansion From the universe since the big explosion.
“We are looking for an attempt to understand the reason for our existence here,” said John Wilcson, a physicist at North Carolina University, Chuch Hill and a new study author. “This is something that the neutrons may have a major role in it.”
Physicists know some things about neutrons. It is a prolific production across the universe, which was actually created at any time of offspring or rupture. But they do not carry any electrical shipment and they are It is difficult to discover.
Neutronat also comes in three types, described by physicists as flavors. It is strange that they turn from one flavor to another while they are moving across the place and time, which is a recognized discovery before Nobel Prize in Physics in 2015. Physicists realized that the basic mechanism that makes these transformations possible is possible, means that neutrons should have some mass.
But just so. Neutronate is light in thinking, and physicists do not know the reason.
Alexei Lakhov, a scientist at the Carlserwah Institute of Technology in Germany, said that the detection of the precise values of the neutrone bloc can lead to a “type of gate” of new physics. He said about his team’s measurement: “This, at the present time, is the best limit in the world.”
Dr. Lukhov and his colleagues used Karlsruhe Tritium Neutrino, or Catherine, to narrow the neutrino mass. At one end of the 230 -foot device, the source of Titium, a heavier version of hydrogen with two neutrons in its nucleus. Since the tritium is unstable, it decomposes to helium: one neutron turns into a proton, which spits electron in this process. It also spits on Antineutrino, Anti -twin From neutrino. The two should be an identical block.
The original tritium block is divided between the dissolution products: helium, electron and antineutrino. Neutrone or antineutrinos cannot be discovered, but a sensor at the other end of the experiment recorded 36 million electron, over a period of 259 days, of decomposing tritium. By measuring the electron movement, it can indirectly infer the maximum possible mass for Antineutrino.
They found that this value does not exceed 0.45 electronte, in the mass units used by particle physicists, one million times lighter than the electron.
The upper limit was measured for only one flavor of neutrino. But Dr. Welcson said that the tanning of a person’s mass makes it possible to calculate the rest.
Another measurement pushes the potential mass of the neutrino is less than The previous limit He was appointed in 2022 by Catherine’s cooperation, no more than 0.8 electron. It is also nearly poor accuracy.
Elise Novitsky, a physicist at Washington University who did not participate in the work, praised the exact effort of the Catherine team.
She said about experience and discovery: “It is really just a tour of strength.” “I have complete confidence in their results.”
The Catherine team works on more strict borders on the neutrino block from 1000 days of data, which is expected to collect by the end of the year. This will give physicists more electrons to measure it, which leads to a more accurate measurement.
Other experiences will also contribute to a better understanding of the neutrino bloc, including Project 8 In Seattle and Neutrino experience under the deep EarthIt spread across two physics facilities in the Middle West.
Astronomers who study the structure of the universe as a whole, and they are believed to be influenced by the wide range of neutrons that flood the universe, have a compassion for particles. However, according to Dr. Wilcson, the borders set by astronomers who stare in a vacuum do not match what particle scientists count in the laboratory, where they examine the world without the atomic.
“There is a really interesting thing,” he said. “The potential solution to this will be physics that go beyond the standard model.”
