The Proton Is Lighter Than We Thought
Gabriel Popkin, Sci Mag
You can't weigh the universe's smallest particles on a bathroom scale. But in a clever new experiment, physicists have found that one such particlethe protonis lighter than previously thought.It's a significant improvement on the mass of the proton, says Edmund Myers, a physicist at Florida State University in Tallahassee who wasn't involved with the work. I can't see any holes in what they've done. They've done a good job.