A particle is a tiny bit of matter that makes up everything in the universe. In particle physics, an elementary particle is a particle which cannot be...

physics, an elementary particle or fundamental particle is a particle that is not made of other particles. An elementary particle can be one of two groups:...

A subatomic particle is a particle smaller than an atom. Like atoms and molecules, a subatomic particle is far too small to be seen with the eye. The...

Theoretical particles are particles that have been assumed or predicted to exist by scientists, but have not been proven in any experiment. Some, like...

A particle accelerator, also called an atom smasher, is a machine that accelerates (speeds up) particles and makes them travel at very high speeds. Accelerators...

Wave–particle duality is a concept in physics. It's the idea that there are things that are both waves and particles. Physicists who studied light in...

Particle physics is a branch of physics that studies tiny pieces of elements, known as particles. These particles are extremely small pieces that build...

An alpha particle is a subatomic particle that is made up of two protons and two neutrons. It is a helium nucleus: that is a helium atom without electrons...

neutral particle is a particle with no electric charge. Long-lived neutral particles do not decay for a very long time. Examples of such particles include...

A particle detector, also known as a radiation detector, is a device used to detect, track, and/or identify high-energy particles. These particles can...

A virtual particle is a short-lived particle. It is similar to an ordinary particle, but cannot be directly detected. Virtual particles can suddenly appear...

Particle size (general) provides general definitions of the particle size notion. Particle size (grain size) provides specific details for particle size...

Two particles that have different numbers of electrons (the smallest particle in an atom which is negative) start reacting to each other. The particle that...

Higgs particle) is an elementary particle in the Standard Model of physics. In the 1960s Peter Higgs was the first person to suggest that this particle might...

Tau (τ) leptons (aka tauons, tau particle) are one of the very small elementary particles. This means that they are believed to be so small that they can...

Beta particles are electrons or positrons emitted by some radioactive nuclei such as potassium-40 or carbon-14 (which becomes nitrogen-14). The beta particles...

The term particle indicates small size, usually less than centimeter. Particle might be either solid, or liquid, or even gas. Liquid particles are called...

"Particle Man" is a song by alternative rock band They Might Be Giants. It was released in 1990. The song is the seventh track on the band's third album...

Composite particles are subatomic particles that are made of more than one quark. Simple particles like protons are actually composites of multiple quarks...

jay/sigh) are subatomic particles made of one charm quark and one charm antiquark. Mesons are a family of composite particles which are made of one quark...

Particle board, also known as particleboard and chipboard, is a wood product made from chips of wood or sawdust. It is mixed with resin or glue (both adhesives)...

The Oh-My-God particle was a really tiny portion of matter or energy (undefined) moving incredibly fast. It was first spotted on the evening of 15 October...

corresponding to most kinds of particle. It has the same mass and opposite electric charge. Even electrically neutral particles, such as the neutron, are not...

The signal recognition particle (SRP) is a common molecule found in cytoplasm. It is a ribonucleoprotein (a protein-RNA complex). It recognizes and targets...

A magnetic monopole is a hypothetical particle in particle physics that is a magnet with only one magnetic pole (a north pole without a south pole or the...

A boson is a particle which carries a force. It has a whole number spin (spin is a property of subatomic particles). Bosons carry energy. A photon is...

for predicting the existence of the Higgs boson, the "most sought-after particle in modern physics". Higgs shared the prize with François Englert. Higgs...

matter is made of tiny particles called atoms. The atoms have spaces between them and they move or vibrate all the time. The particles move faster and move...

Particle size, also called grain size, means the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also...

gravitino is a theoretical particle that physicists think will carry the force of gravity. There is no confirmation of the particle's existence. This short...

A fermion is a category of elementary particles. They are very small and very light. Fermions can be thought of as the building blocks of matter because...

make bigger particles called hadrons. Gluons carry the strong force between other quarks, so it is considered a force carrying particle. Photons do the...

A graviton is a hypothetical particle that 'transfers' gravitation's force (particles like this are known as gauge bosons) from its field. Gravitons have...

was discovered by J. J. Thomson in 1897. An electron is a subatomic particle, particle smaller than an atom. Every atom is made of some electrons that surround...

in particle physics, is any subatomic (smaller than the atom) particle or antiparticle which is made of quarks. Quarks are fundamental particles which...

lightest quarks, which are subatomic particles that are so small, they are believed to be the fundamental particles, and not further divisible. Like down...

In particle physics, quarkonium (pl. quarkonia) is a flavorless meson whose constituents are a heavy quark and its own antiquark, making it a neutral particle...

The muon is an elementary particle. It has a negative electric charge and half spin. Its symbol is "μ-". It is a type of lepton. The muon has an average...

that acceleration of a particle is dependent on the forces acting upon the particle and the particle's mass. For a given particle, if the net force is increased...

negatively charged particle of very small mass compared to its electric charge. It was later called the electron and was the first subatomic particle to be found...

Carlo Rubbia, OMRI, OMCA (born 31 March 1934) is an Italian particle physicist and inventor. He shared the Nobel Prize in Physics in 1984 with Simon van...

radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: electromagnetic...

in physics, are particles which transmit light. In other words, light is carried over space by photons. Photon is an elementary particle that is its own...

D mesons, and other charmed particles. Since they are fermions (particles that can not have more than one of that particle at the same place at the same...

Frame dragging is a theory which says that space is elastic, and particles in it will exchange energy with it. In the scientific world, "elastic" means...

A quark is an elementary particle which makes up hadrons, the most stable of which are protons and neutrons. Atoms are made of protons, neutrons and electrons...

everyday world. When we look at particles, we usually say that each particle has its own quantum state. Sometimes, two particles can act on one another and...

carbon-14. However, carbon-14 is radioactive. It's carrying too many particles to hold, so it lets go of some and decays through beta decay to become...

Experiments such as the Stern-Gerlach experiment have shown that sub-atomic particles, such as electrons, seem to have a north pole and a south pole much like...

physics, gravity, how light moves in the universe, space-time, elementary particles (very small objects that make up things in the universe), black holes...