hadron


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Related to hadron: baryon

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 ?
Hyslope, who joined Hadron earlier this year as Director of Human Resources, leads the Company's policy development and implementation programs, as well as all areas of Human Resources and overall corporate administration.
the Large Hadron Collider " is nearly 17 miles long and buried more than 300ft beneath the French and Swiss countryside.
As per the contract rule, Quick Turn Circuits will be responsible for provision of the Hadron traffic controllers and the Sydney Coordinated and daptive Traffic Systems.
I mean, when you've got a large hadron collider, there's not really so much you can do apart from colliding large hadrons.
The Hadron Collider, which is based in Switzerland's CERN research facility, is the world's most powerful "atom smasher" and was designed to uncover fundamental questions about the building blocks of the universe.
THE accuracy of a West Midlands engineering firm's components will be tested to the limit after securing a major contract to supply parts to a facility similar to the Large Hadron Collider.
Kingswinford-based TM Engineers, which employs 55 staff, won an order to manufacture and supply crucial mechanical components for the world-famous Large Hadron Collider based in Geneva, home of the long-running scientific study project.
The accuracy of a West Midlands engineering firm's components will be tested to the limit after they secured a major contract to supply parts to a facility similar to the Large Hadron Collider.
The findings, from the Fermilab accelerator in Chicago, are similar to those discovered in tests at Geneva's Hadron Collider.
CERN, the international agency in Geneva that oversees experiments in the Large Hadron Collider (LHC), announced Monday in a progress report the news of mounting experimental evidence for the existence of this critically important speck of nature.
Summary: Scientists say they have found signs of the Higgs boson while conducting tests at the Large Hadron Collider near Geneva.
surveys cutting edge theoretical physics, focusing on research enabled by the Large Hadron Collider.