hadron

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Hadron

The generic name of a class of particles which interact strongly with one another. Examples of hadrons are protons, neutrons, the &pgr;, K, and D mesons, and their antiparticles. Protons and neutrons, which are the constituents of ordinary nuclei, are members of a hadronic subclass called baryons, as are strange and charmed baryons. Baryons have half-integral spin, obey Fermi-Dirac statistics, and are known as fermions. Mesons, the other subclass of hadrons, have zero or integral spin, obey Bose-Einstein statistics, and are known as bosons. The electric charges of baryons and mesons are either zero or ±1 times the charge on the electron. Masses of the known mesons and baryons cover a wide range, extending from the pi meson, with a mass approximately one-seventh that of the proton, to values of the order of 10 times the proton mass. The spectrum of meson and baryon masses is not understood. See Baryon, Bose-Einstein statistics, Fermi-Dirac statistics, Meson, Neutron, Proton

Based on an enormous body of data, hadrons are now thought to consist of elementary fermion constituents known as quarks which have electric charges of + |e| and |e|, where |e| is the absolute value of the electron charge. For example, a quark-antiquark pair makes up a meson, while three quarks constitute a baryon. See Elementary particle, Quarks

hadron

(had -ron) See elementary particles. See also Big Bang theory.

hadron

[′had‚rän]
(particle physics)
An elementary particle which has strong interactions.
References in periodicals archive ?
The two basic notions of hadronic chemistry that we need for understanding the iso-chemical model of the hydrogen molecule are:
The weak hadronic interaction in nuclear systems is not well characterized.
IBR provides editorial services to a number of technical publications, including Algebras, Groups and Geometries (15 years of regular publication), Hadronic Journal (20 years) and Hadronic Journal Supplement (12 years).
The non-conservation of parity of hadronic interactions is closely related to the interaction current of neutrino couplings.
Joint Meeting Heidelberg-Liege-Paris-Rostock for Hadronic Physics (2004: Spa, Belgium) Ed.
A quantitative description of this interaction is needed to understand weak interaction phenomena in atomic, nuclear, and hadronic systems.
The same Hadronic Reactors can also process any carbon rich liquid into MagneGas, plus heat.
Words like 'aseity', 'apophatic', 'heuristic', 'axiological', and -- in a slightly different category -- such horrors as 'facticity' and 'salvific' do not trip off the tongues of most people every day of the week; and phrases like 'the hadronic spectrum of octets and decuplets; deep inelastic scatterings' are unlikely to mean much to most people.
Objective: Over the last fifteen years spectroscopy, the study of the hadronic states, has received a lot of attention.
All but one of the predictions rely on the Regular Charge-Monopole Theory (RCMT) [1,2] and on its application to hadronic structure and processes [3].
Ergut: Bertrand curves for nonnull curves in 3-dimensional Lorentzian space, Hadronic J.
String theory may be exactly that, a theory, but it has nevertheless strongly influenced thinking in such fields of research as high energy and hadronic physics, gravitation, cosmology, mathematical physics and even condensed matter physics.