A visionary solution to dry-eye syndrome

Physicist Hermann Wellenstein spends a lot of time thinking about what happens when subatomic particles smash together at nearly the speed of light. A member of Brandeis' high-energy physics group, Wellenstein and his colleagues ...

Oncology & Cancer

Explainer: What is proton therapy?

When you stand in the 27km-long Large Hadron Collider tunnel deep under Switzerland and France it looks as if the chain of blue magnets simply stretches off to infinity. So when people talk about putting particle accelerators ...

Oncology & Cancer

Study investigates proton radiation effects on cells

(Phys.org) -- A team of researchers at NASA's Johnson Space Center in Houston and Lawrence Berkeley National Laboratory in Berkeley, Calif., has found radiation from protons could further enhance a process that occurs during ...

Subatomic particle

In physics, subatomic particles are the particles composing nucleons and atoms. There are two types of subatomic particles: elementary particles, which are not made of other particles, and composite particles. Particle physics and nuclear physics study these particles and how they interact.

Elementary particles of the Standard Model include:

Composite subatomic particles (such as protons or atomic nuclei) are bound states of two or more elementary particles. For example, a proton is made of two up quarks and one down quark, while the atomic nuclei of helium-4 is composed of two protons and two neutrons. Composite particles include all hadrons. These, in turn, are composed of baryons (e.g., protons and neutrons) and mesons (e.g., pions and kaons).

There are hundreds of known subatomic particles. Most are either the result of cosmic rays interacting with matter, or have been produced by scattering processes in particle accelerators.[citation needed]

This text uses material from Wikipedia, licensed under CC BY-SA