Pictures Tagged Neutron
karlrovebook posted a photo:
Book autographed to Conan Neutron, the guy who curated the project against him. Oh sweet irony! | bruce cumstein posted a photo:
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bruce cumstein posted a photo:
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In particle physics, a hadron is a particle made of quarks held together by the strong force (similarly to how molecules are held together by the electromagnetic force). There are two known types of hadrons: mesons (made of one quark and one antiquark) and baryons (made of three quarks). Other combinations may exist, such as tetraquarks (or, more generally, exotic mesons) and pentaquarks (exotic baryons), but no evidence conclusively suggests their existence as of 2010.
The best-known mesons are pions and kaons, while the best-known baryons are protons and neutrons.
According to the quark model, the properties of hadrons are primarily determined by their so-called valence quarks. For example, a proton is composed of two up quarks (each with electric charge +2?3) and one down quark (with electric charge ?1?3). Adding these together yields the proton charge of +1. Although quarks also carry color charge, hadrons must have zero total color charge because of a phenomenon called color confinement. That is, hadrons must be "colorless" or "white". There are two ways to accomplish this: three quarks of different colors, or a quark of one color and an antiquark carrying the corresponding anticolor. Hadrons based on the former are called baryons, and those based on the latter are called mesons.
en.wikipedia.org/wiki/Hadrons |
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