proton's

Each proton (or neutron) is made of three quarks - but the individual masses of these quarks only add up to about 1% of the proton's mass.

'Natural Born' Baloney 2008

All nucleons (protons & neutrons) attract each other much more strongly than the electric repulsion between protons (protons all have a + charge while neutrons have none), but the nuclear force has a very limited range, becoming exponentially weak at a distance not much bigger than a proton's diameter.

Boing Boing: September 4, 2005 - September 10, 2005 Archives 2005

But when the universe was created, all these particles played a role as important as the proton's, the neutron's and the electron's.

The Nobel Prize in Physics 1992 1992

A force, the 'lowest energy wall,' over which no electron can jump, caused by the enormous space distorting of the proton's mass and electrical attraction, prevents it.

Invaders from the Infinite John Wood Campbell 1940

Many theorists thought supersymmetry had the most compelling answers to those unresolved problems, and most supersymmetric models predicted the Higgs mass to be in the narrow range of 115 to 130 GeV a giga-electron-volt is a unit of energy or mass; 1 GeV is a bit more than a proton's mass.

NYT > Home Page By ROBERT GARISTO 2011

A new measurement provides the most accurate weight yet of antimatter, revealing the mass of the antiproton (the proton's antiparticle) down to one part in a billion, researchers announced today (July 28).

Yahoo! News: Business - Opinion 2011

That may not seem like much, especially given the proton's infinitesimally tiny size.

PhysOrg.com - latest science and technology news stories 2010

As a result, the proton's structure can be probed more accurately than by using hydrogen.

PhysOrg.com - latest science and technology news stories 2010

Simply, the long-standing value used for a proton's radius is

Discover Blogs 2010

So, the Planck mass is about 13 quintillion times the proton's mass.

New Scientist - Online News 2010