![]() The team used an innovative approach to calculate the mass of neutrinos by using data collected by both cosmologists and particle physicists. The particle could technically have no mass as a lower limit is yet to be determined. The study, published today in Physical Review Letters by researchers from UCL, Universidade Federal do Rio de Janeiro, Institut d'Astrophysique de Paris and Universidade de Sao Paulo, sets an upper limit for the mass of the lightest neutrino for the first time. Even so, the Standard Model used by modern physics has yet to be updated to assign neutrinos a mass. McDonald the 2015 Nobel Prize in Physics. The concept that neutrinos have mass is a relatively new one with the discovery in 1998 earning Professor Takaaki Kajita and Professor Arthur B. Three flavours are always present but in different ratios, and the changing ratio-and the weird behaviour of the particle-can only be explained by neutrinos having a mass." "The three flavours can be compared to ice cream where you have one scoop containing strawberry, chocolate and vanilla. What we do know is that as they move, they can change between their three flavours, and this can only happen if at least two of their masses are non-zero." These are very weakly interactive ghosts that we know little about. Arthur Loureiro (UCL Physics & Astronomy), said: "A hundred billion neutrinos fly through your thumb from the Sun every second, even at night. It's important to better understand neutrinos and the processes through which they obtain their mass as they could reveal secrets about astrophysics, including how the universe is held together, why it is expanding and what dark matter is made of.įirst author, Dr.
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