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 ?
and because of their quantized charges (-1, 0, +1) we expect the hadrons charges to be also quantized (-Q, -Q +1,.
Is the activation of the hadron collider really scheduled this week?
the Large Hadron Collider " is nearly 17 miles long and buried more than 300ft beneath the French and Swiss countryside.
Reading about the Large Hadron Collider, with its spinning particle streams, hypercontrolled collisions, and awesome implications, is like learning about what wizards do.
First of all, we told them that our conclusions about the Higgs were only tentative and needed further confirmation, then we explained that even if we had found it, it was not THE Higgs Boson, but only A Higgs Boson, and there might be a lot more of them that we should keep looking for; and then we told them that this is, after all, a large hadron collider, and we really ought to be trying to collide some small hadrons too, which could lead to the discovery of a smaller Higgs Boson, which would take up less space than the Higgs Boson we've got already, thus leaving room for any further discoveries that might be made in the fullness of time.
TM Engineers became involved with the Hadron Collider through Rutherford Appleton Laboratories based in Oxfordshire, which is part of the Science and Technology Facilities Council.
The Large Hadron Collider results will be announced at a scientific seminar at 2 a.
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.
com)-- In the early 21st century, scientists and engineers began the construction of the now-famous device known as the "Large Hadron Collider," which is a giant testing machine utilized to accelerate particles in a vacuum.
Dr Grant Christopher, 29, of Lindley, had just completed his PhD in New York when he was offered the opportunity to join the team at the Large Hadron Collider.
The Large Hadron Collider at Cern has set a new world record for beam intensity at a hadron collider when it collided beams with a luminosity of 4.