pionic definition of pionic in the Free Online Encyclopedia.

pion (pī`ŏn) or pi meson, lightest of the meson meson [Gr.,=middle (i.e., middleweight)], class of elementary particles whose masses are generally between those of the lepton class of lighter particles and those of the baryon class of heavier particles.
..... Click the link for more information. family of elementary particles elementary particles, the most basic physical constituents of the universe. Basic Constituents of Matter

Molecules are built up from the atom, which is the basic unit of any chemical element.
..... Click the link for more information. . The existence of the pion was predicted in 1935 by Hideki Yukawa, who theorized that it was responsible for the force force, commonly, a "push" or "pull," more properly defined in physics as a quantity that changes the motion, size, or shape of a body. Force is a vector quantity, having both magnitude and direction.
..... Click the link for more information. of the strong interactions strong interactions, actions between elementary particles mediated, or carried, by gluons. They are responsible for the binding of protons and neutrons in the nucleus and interactions between quarks.
..... Click the link for more information. holding the atomic nucleus nucleus, in physics, the extremely dense central core of an atom. The Nature of the Nucleus
Composition

Atomic nuclei are composed of two types of particles, protons and neutrons, which are collectively known as nucleons.
..... Click the link for more information. together. It was first detected in cosmic rays cosmic rays, charged particles moving at nearly the speed of light reaching the earth from outer space. Primary cosmic rays consist mostly of protons (nuclei of hydrogen atoms), some alpha particles (helium nuclei), and lesser amounts of nuclei of carbon, nitrogen,
..... Click the link for more information. by C. F. Powell in 1947. The pion is actually a multiplet of three particles. The neutral pion, π⁰, has a mass about 264 times that of the electron. The charged pions, π⁺ and π⁻, each have a mass about 273 times that of the electron. The neutral pion is its own antiparticle antiparticle, elementary particle corresponding to an ordinary particle such as the proton, neutron, or electron, but having the opposite electrical charge and magnetic moment.
..... Click the link for more information. , while the negative pion is the antiparticle of the positive pion. It is now known that each pion (and, more generally, each meson) consists of a quark bound to an antiquark. Free pions are unstable. The charged pions decay with an average lifetime of 2.55 × 10⁻⁸ sec into a muon muon , elementary particle heavier than an electron but lighter than other particles having nonzero rest mass. The name muon is derived from mu meson, the former name of the particle. The muon was first observed in cosmic rays by Carl D.
..... Click the link for more information. of like charge and a neutrino neutrino [Ital.,=little neutral (particle)], elementary particle with no electric charge and a very small mass emitted during the decay of certain other particles.
..... Click the link for more information. or antineutrino; the neutral pion decays in about 10⁻¹⁵ sec, usually into a pair of photons but occasionally into a positron-electron pair and a photon.

pion, pi meson

Physics a meson having a positive or negative charge and a rest mass 273.13 times that of the electron, or no charge and a rest mass 264.14 times that of the electron

pion [′pī‚än]

(particle physics)

pi meson

Mentioned in	?		References in periodicals archive	?		Encyclopedia browser	?		Full browser	?
No references found			htm Product description: Pionic ShoppingMall ASP is a scalable e-commerce hosting solution for ISPs, ASPs, portal sites, etc. Internet World Spring 2002 Exhibitor Profiles; Conference and ... by Business Wire			Pio, Louis Pio, Padre Piobert lines PIOCS Piombino Piombo, Sebastiano del pion pion bremsstrahlung pion condensate pion double-charge exchange Pioneer Pioneer Brigade Pioneer Camp Pioneer Dawn Pioneer Historic Byway Pioneer Journals Pioneer Leader Pioneer Newspapers Pioneer State Recreation Area pioneer tunnel Pioneers Pioner Pionerskaia Pionerskaia Pravda Pionerskii pionic pionium Pions Piontkovskii, Andrei Piontkovskii, Andrei Andreevich Piontkovskii, Sergei Piontkovskii, Sergei Andreevich Piophilidae piotine Piotr Jaroszewicz Piotr Michalowski Piotr Sciegienny Piotrkow Piotrków Piotrkow Statute of 1496 Piotrków Statute of 1496 Piotrków Trybunalski Piotrovskii, Adrian Piotrovskii, Adrian Ivanovich Piotrovskii, Boris Piotrovskii, Boris Borisovich Piovene, Guido Piozzi, Mrs. pip pipa pipal			Pioneer Valley Transit Authority Pioneer Venus Gas Chromatograph Pioneer Venus Multiprobe Pioneer Venus Orbiter Pioneer Youth Crew Pioneer-Sarah Creek Watershed Management Commission pioneered pioneered pioneered pioneering pioneering pioneering Pioneering Advanced Mobile Privacy and Security Pioneering Caller Authentication for Secure Service Operation Pioneering High Energy Nuclear Interaction eXperiment Pioneering Substance Misuse Recovery pioneers pioneers pioneers Pioneers Advancing Reproductive Liberties and Education Pioneers for Christ Pioneers for Jesus Pioneers Memorial Healthcare District Pioneers' Day Pioner Pioner Pionerskaia Pionerskaia Pravda Pionerskii Pionersky pionic Pionier Pionier André Citroën Automobielclub Nederland Pioniere Pionites Pionium Pionniers de la Route Organisation Pions Pions Pions Piontkovskii, Andrei Piontkovskii, Andrei Andreevich Piontkovskii, Sergei Piontkovskii, Sergei Andreevich Pionus Parrots Research Foundation Piony PIOO PIOOM PIOOMA PIOP PIOPED PIOPED Piophila casei Piophilidae Piophilidae PIOPS PIOS piosities piosity

pion (redirected from pionic)

pion
(redirected from pionic)