mass

Following nearly a decade of analysis, the CMS experiment has found that the W boson’s mass aligns perfectly with Standard Model predictions with remarkable accuracy.

From Big Think: A recent series of precise measurements of the Moon confirms that there are two types of mass which are the same. In Einstein’s most advanced theory, there are three “kinds” of mass that are thought to be one and the same but there is no fundamental reason why. Don Lincolns explains why.

The quest to understand the small mass of neutrinos is also a quest to discover new particles.

For decades, scientists have tried to find a way to measure the mass of the lightest matter particle known to exist. Three new approaches now have a chance to succeed.

From New Scientist, Dec. 16, 2022: This year was another busy year in science and technology and New Scientist news editors’ have chosen some of the biggest scientific developments, discoveries and events in 2022. Included in this year’s selections is the April 2022 announcement of the mass of the W boson that used Fermilab’s Tevatron.

From der Standard (Germany), October 23, 2022: A new report on the mass of the Higgs ten years after its discovery. The CMS detector team has measured the uncertainty of the mass of the Higgs boson more precisely and the new findings have been published in nature.

From Pour la Science, April 11, 2022: A new measurement of the mass of the W boson is higher than predicted by the Standard Model. Is this a sign of new physics? For experts in the field, this conclusion would be premature. But this result is nevertheless very interesting as one of the most difficult measurements in physics.

From Forbes, Sept. 8, 2021: The Standard Model provides the framework of all the known and discovered fundamental particles, but has no way of providing expected values for what masses each particle should possess. Fermilab’s Main Ring, in operation for 25 years by physicists who used the accelerator for experiments, helped to create our current picture of the ultimate structure of matter, the Standard Model of particle interactions.

Extremely massive fundamental particles could exist, but they would seriously mess with our understanding of quantum mechanics.

Imagine a particle. What comes to mind? If you aren’t a theoretical particle physicist, chances are you picture a tiny ball, bobbing in space. But that’s not quite correct. One way to prove it: Try to imagine that tiny ball as a particle with no mass. If a particle has no mass, how can it exist?