May 18, 2024

Deciphering the Mystery of Neutrino Mass – A New Approach Uses Random Matrix Theory

In the Standard Model, the masses of the 3 generations of neutrinos are represented by a three-by-three matrix.
Neutrinos are known to have less distinction in mass between generations than other primary particles, so the research study group considered that neutrinos are approximately equal in mass between generations. They evaluated the neutrino mass matrix by randomly appointing each component of the matrix.” In this research study, we showed that the neutrino mass hierarchy can be mathematically discussed utilizing random matrix theory.

The horizontal axis reveals the regular logarithm of the neutrino mass squared difference ratio, while the vertical axis shows their likelihood circulation. Each histogram represent the likelihood circulations for the seesaw mechanisms of the matching color. The vertical red and blue lines represent the speculative values (1σ and 3σ errors) of the normal logarithm of the neutrino mass squared difference ratio. The likelihood circulation for the seesaw model with the random Dirac and Majorana matrices in orange has the greatest likelihood of reproducing the speculative worth. Credit: Naoyuki Haba, Osaka Metropolitan University
” Clarifying the residential or commercial properties of elementary particles causes the expedition of deep space and ultimately to the grand theme of where we came from!” Teacher Haba described. “Beyond the staying secrets of the Standard Model, there is an entire brand-new world of physics.”
After studying the neutrino mass anarchy in the Dirac neutrino, seesaw, double seesaw models, the researchers discovered that the anarchy approach requires that the measure of the matrix ought to comply with the Gaussian circulation. Having actually considered a number of designs of light neutrino mass where the matrix is composed of the item of numerous random matrices, the research team had the ability to prove, as finest they might at this phase, why the calculation of the squared distinction of the neutrino masses are closest with the speculative lead to the case of the seesaw model with the random Dirac and Majorana matrices.
” In this study, we revealed that the neutrino mass hierarchy can be mathematically explained using random matrix theory. This evidence is not mathematically total and is anticipated to be rigorously proven as random matrix theory continues to develop,” stated Professor Haba. “In the future, we will continue with our difficulty of elucidating the three-generation copy structure of primary particles, the important nature of which is still completely unknown both theoretically and experimentally.”
Reference: “Neutrino mass square ratio and neutrinoless double-beta decay in random neutrino mass matrices” by Naoyuki Haba, Yasuhiro Shimizu and Toshifumi Yamada, 19 January 2023, Progress of Theoretical and Experimental Physics.DOI: 10.1093/ ptep/ptad010.
The study was moneyed by the Ministry of Education, Culture, Sports, Science and Technology of Japan.

Scientists have actually utilized random matrix theory to in theory show that neutrino mass hierarchy can be mathematically described.
When any compound is fragmented into increasingly smaller sectors, eventually, you reach a point where division is no longer possible. At this point, youre left with a primary particle. Currently, 12 distinct elementary particles have actually been recognized, composed of a blend of quarks and leptons, each offered in six special variations.
These variations are categorized into three generations. Each generation includes a lepton that brings a charge and one that is neutral, forming different particles such as electron, tau, and muon neutrinos. In the Standard Model, the masses of the three generations of neutrinos are represented by a three-by-three matrix.
Neutrinos are known to have less distinction in mass between generations than other primary particles, so the research study group thought about that neutrinos are roughly equal in mass in between generations. They evaluated the neutrino mass matrix by randomly designating each component of the matrix.