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{{Short description|Property of particles}} ...ration (this is realized because the intrinsic parity is a property of a [[subatomic particle|particle]] species) and use the fact that two parity transformatio ...

{{Short description|Property of elementary particles}} ...ressed as a [[quantum number]], for describing [[Particle decay|decay]] of particles in [[Strong interaction|strong]] and [[Electromagnetic interaction|electrom ...

{{particles}} [[Category:Hypothetical elementary particles]] ...

...ve, these generate the global [[SU(6)]] flavor symmetry of the fundamental particles; this symmetry is [[Gell-Mann–Okubo mass formula|badly broken]] by the mas ...

== Ionizing radiation, subatomic particles == ...

...b]] (kg/C). It is most widely used in the [[electrodynamics]] of [[charged particles]], e.g. in electron optics and [[ion optics]]. ...mass-to-charge ratio, according to classical electrodynamics, is that two particles with the same mass-to-charge ratio move in the same path in a vacuum, when ...

...ube. The voltage applied between the electrodes accelerates these low mass particles to high velocities. Cathode rays are invisible, but their presence was firs ...end of the tube without a collision. With no obstructions, these low mass particles were accelerated to high velocities by the voltage between the electrodes. ...

...words? I believe it is ... that ''all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a ...science concerned with the forces that occur between electrically charged particles. ...

...that this so-called dark matter is made of hitherto undiscovered subatomic particles.}}</ref> that are difficult to detect, but some believe that it could be re ...of vector and/or scalar bosons, that is a predicting as yet undetected new particles.<ref name=NewPhysicsAtoms/> ...

...ameterized with ''flavour [[quantum number]]s'' that are assigned to all [[subatomic particle]]s. They can also be described by some of the [[family symmetries] Composite particles can be created from multiple quarks, forming [[hadron]]s, such as [[meson]] ...

...their scattering cross section is related to their geometric size. If the particles interact through some action-at-a-distance force, such as [[electromagnetis ==Collision among gas particles== ...

...lways created, keeping the net amount of charge unchanged. Similarly, when particles are destroyed, equal numbers of positive and negative charges are destroyed ...ample, the magnitude of the [[elementary charge]] on positive and negative particles must be extremely close to equal, differing by no more than a factor of 10< ...

...rges, multiples of {{sfrac|1|3}}''e'', but they are found only combined in particles that have a charge that is an integer multiple of ''e''. In the [[Standard ...n [[physics]]. The study of [[photon]]-mediated interactions among charged particles is called [[quantum electrodynamics]].<ref>{{cite book |editor1-last=Rennie ...

...far beyond both the [[rest mass]] and energies typical of other cosmic ray particles. These particles are extremely rare; between 2004 and 2007, the initial runs of the [[Pierre ...

...cribe other systems, different quantum numbers are required. For subatomic particles, one needs to introduce new quantum numbers, such as the [[flavour (particl ...models set the stage for the development of quantum numbers for elementary particles in the remainder of the 20th century.<ref name=Giulini/> ...

...flux]], the rate of transfer of particles through a unit area ([number of particles] m⁻²·s⁻¹) ...the [[Maxwell–Boltzmann distribution#Typical speeds|mean velocity]] of the particles. ...

...onservation of parity of particles states that, if an isolated ensemble of particles has a definite parity, then the parity remains invariable in the process of ...t of the parities of the one-particle states. It is −1 if an odd number of particles are in odd-parity states, and +1 otherwise. Different notations are in use ...

{{Short description|Quantum mechanics taking into account particles near or at the speed of light}} ...QM is ''relativistic [[quantum field theory]]'' (QFT), in which elementary particles are interpreted as ''field quanta''. A unique consequence of QFT that has b ...

...rticles smaller than atoms. The [[Standard Model]] predicts that exchanged particles called [[gauge boson]]s are the fundamental means by which forces are emitt ...in a [[closed system]] of particles, all internal forces are balanced. The particles may accelerate with respect to each other but the [[center of mass]] of the ...

...}})) when they are in vacuum. The photon belongs to the class of [[boson]] particles. As with other elementary particles, photons are best explained by [[quantum mechanics]] and exhibit [[wave–par ...