News Physics Standard model gets right answer for proton, neutron masses Correct calculation strengthens theory of quark-gluon interactions in nuclear particles Share this:FacebookTwitterPocketRedditPrintEmail By Ron Cowen November 20, 2008 at 2:42 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe