proton

That would make it more than 200 times as massive as a proton.

From Science Daily ● Sep. 4, 2026

For the first time, Jefferson Lab researchers detected two such signals created when a beam of high-energy photons interacted with a proton target.

From Science Daily ● Sep. 2, 2026

"It's believed that the lifetime of a proton is longer than the lifespan of the universe," Lewis said.

From Science Daily ● Aug. 16, 2026

"But at high energy, gluons within the proton split and multiply."

From Science Daily ● Aug. 16, 2026

However, in 1932 a colleague of Rutherford’s at Cambridge, James Chadwick, discovered that the nucleus contained another particle, called the neutron, which had almost the same mass as a proton but no electrical charge.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

Millions of these photons strike protons inside a liquid hydrogen target every second.

From Science Daily ● Sep. 2, 2026

In this process, a photon beam strikes protons held inside a fixed target.

From Science Daily ● Sep. 2, 2026

During that period, temperatures were so extreme that protons and neutrons had not yet formed.

From Science Daily ● Aug. 23, 2026

In this case, the neutrons and protons in the nucleus essentially flipped their internal magnets.

From Science Daily ● Aug. 21, 2026

The horizontal rows, meanwhile, arrange the chemicals in ascending order by the number of protons in their nuclei–what is known as their atomic number.

From "A Short History of Nearly Everything" by Bill Bryson