hadron

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Related to Hadrons: antiquark, Mesons, Baryons

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 ?
But to describe hadrons, one does not have much choices except to take a look at experiments data before begin to start theorizing, this is perhaps what Gell-Mann meant while emphasizing that physicists should sail between Scylla and Charybdis.
Do physicists think that the Large Hadron Collider's findings will be the end of particle physics?
Project leader for CERN's Large Hadron Collider (LHC) Dr Lyn Evans, left, speaking with engineer Carlos Fernandez Robles.
There are four large detectors, named Alice, Atlas, CMS and LHCb (Large Hadron Collider beauty).
To collide large hadrons in fact," he corrected me.
The last section discusses CGLE model of hadron masses and non-equilibrium phase transitions in infrared QCD.
Cast your mind back to last year and you may recall the Large Hadron Collider at Cern in Switzerland that broke almost as soon as it was turned on and had to be turned off again for repairs.
As a quark-gluon plasma cools, it condenses into hadrons.
I mean, when you've got a large hadron collider, there's not really so much you can do apart from colliding large hadrons.
International Conference on Hadron Spectroscopy (11th: 2005: Rio de Janeiro) Ed.
These transition probabilities provide the raw numbers from which theorists can deduce such particle characteristics as the mass ratios of hadrons.
The lumpiness might, however, offer insight into exactly how the four forces of nature became unified, while contrasting theories on how clusters of quarks formed protons and other particles collectively known as hadrons.