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" ... The internal structure of a proton, with quarks, gluons, and quark spin shown. The nuclear force ... [+] acts like a spring, with negligible force when unstretched but large, attractive forces when stretched to large distances. To the best of our understanding, the proton is a truly stable particle, and has never been observed to decay. ... "
" ... The internal structure of a proton, with quarks, gluons, and quark spin shown. The nuclear force... [+] acts like a spring, with negligible force when unstretched but large, attractive forces when stretched to large distances. To the best of our understanding, the proton is a truly stable particle, and has never been observed to decay. ... "