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Topic: Gauge bosons

Related Topics

Vector boson

Gauge theory

Boson

Higgs field

Gluon

W and Z bosons

Higgs mechanism

Quantum chromodynamics

Isospin

Uncertainty principle

Argand diagram

SU(2)

Atom

Adjoint representation

Helium

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	The Standard Model
		Gauge invariance is a powerful symmetry that tames uncontrollable infinities in quantum amplitudes and encodes the rich symmetry structure of conserved charges observed in elementary particle physics.
		The massless gauge field of this theory is known as the gluon.
		The resulting theory has massive gauge bosons but still retains the nice properties of a fully gauge invariant theory where the gauge bosons would normally be massless.
	www.superstringtheory.com /experm/exper2a.html (760 words)

	Gauge boson - Wikipedia, the free encyclopedia
		Photons are gauge bosons of the electromagnetic interaction, the weak interactions are mediated by weak bosons or "vector bosons", and the carriers of the strong interaction are known as gluons.
		In a quantized gauge theory, gauge bosons are quanta of the gauge fields.
		Photons and gluons are massless gauge bosons, whereas the W and Z bosons of electroweak theory have mass.
	en.wikipedia.org /wiki/Gauge_boson (345 words)

	Gauge - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-09-14)
		The actions of bosons, which mediate interactions between fermions, in the theories of the electroweak interaction and quantum chromodynamics of the Standard Model of particle physics, are invariant under gauge transformations, so these bosons are called gauge bosons.
		Railway - track or rail gauge means the distance between the inside edges of the two rails forming the track (for example, standard gauge and narrow gauge) while loading gauge refers to the set of height and width profiles governing the maximum dimensions of railway vehicles.
		The gauge is determined by the number of solid spheres of a diameter equal to the inside diameter of the barrel that could be made from a pound of lead.
	www.bonneylake.us /project/wikipedia/index.php/Gauge (518 words)

	Gauge boson (Site not responding. Last check: 2007-09-14)
		Gauge boson s are boson ic particles which act as carriers of the fundamental force s of Nature.
		Photon s are gauge bosons of the electromagnetic interaction, the weak interactions are mediated by weak bosons or "vector bosons", and the carriers of the strong interaction are known as gluon s.
		In a quantize d gauge theory, gauge bosons are quanta of the gauge field s.
	www.serebella.com /encyclopedia/article-Gauge_boson.html (876 words)

	Gauge boson (Site not responding. Last check: 2007-09-14)
		Photons are gauge bosons of the electromagnetic the weak interactions are mediated by weak bosons or "vector bosons" and the carriers the strong interaction are known as gluons.
		Gauge bosons are described mathematically for reasons such as gauge invariance by field equations for massless particles.
		Photons gluons are massless gauge bosons whereas the and Z bosons of electroweak theory have mass.
	www.freeglossary.com /Gauge_boson (587 words)

	Encyclopedia: List of particles
		) is the superpartner of the graviton boson in supergravity theories.
		The X boson and the Y boson are predicted by GUT theories to be heavier equivalents of the W and Z. The graviscalar (spin-0) and graviphoton (spin-1).
		The pions are quasi-Goldstone bosons (quasi- because they are not exactly massless) of the broken chiral isospin symmetry of quantum chromodynamics.
	www.nationmaster.com /encyclopedia/List-of-particles (4751 words)

	Boson - Wikipedia, the free encyclopedia
		Bosons, named after Satyendra Nath Bose, are particles which form totally-symmetric composite quantum states.
		Gauge bosons are elementary particles which act as the carriers of the fundamental forces such as the W vector bosons of the weak force, the gluons of the strong force, the photons of the electromagnetic force, and the graviton of the gravitational force.
		This explains the spectrum of fl-body radiation and the operation of lasers, the properties of superfluid helium-4 and the possibility of bosons to form Bose-Einstein condensates, a particular state of matter.
	en.wikipedia.org /wiki/Bosons (285 words)

	Boson - Wikipedia, the free encyclopedia
		Bosons are also the only particles which can occupy the same state as another.
		All elementary particles are either bosons or fermions.
		Particles composed of a number of other particles (such as protons or nuclei) can be either fermions or bosons, depending on their total spin.
	www.wikipedia.org /wiki/Bosons (285 words)

	Learn more about Gauge theory in the online encyclopedia. (Site not responding. Last check: 2007-09-14)
		Gauge theories are usually discussed in the language of differential geometry.
		Infinitesimal gauge transformations form a Lie algebra, which is characterized by a smooth Lie algebra valued scalar, ε.
		In the theories of the electroweak interaction and quantum chromodynamics of the Standard Model of particle physics, the Lagrangians of bosons, which mediate interactions between fermions, are invariant under gauge transformations.
	www.onlineencyclopedia.org /g/ga/gauge_theory.html (478 words)

	CERN Courier - The W and Z at LEP - IOP Publishing - article
		The properties of the Z boson and the underlying electroweak theory were studied at LEP by measuring the overall formation cross-section, the forward-backward asymmetries of the leptons and quarks, and the polarization of tau leptons.
		The gauge symmetry theory was introduced by Hermann Weyl as the basic symmetry principle of quantum electrodynamics; the scheme was later generalized by C N Yang and R L Mills to non-abelian gauge symmetries, before being recognized as the basis of the (electro) weak and strong interactions.
		The prediction of gauge cancellations is clearly borne out by the LEP data (see figure 8), thus confirming the crucial impact of gauge symmetries on the dynamics of the electroweak Standard Model sector in a most impressive way.
	www.cerncourier.com /main/article/44/4/15 (2374 words)

	Gauge boson -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-14)
		Gauge bosons are (Any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons) bosonic particles which act as carriers of the (Click link for more info and facts about fundamental force) fundamental forces of Nature.
		Consequently, there are as many gauge bosons as there are (Engine that converts mechanical energy into electrical energy by electromagnetic induction) generators of the (Click link for more info and facts about gauge group) gauge group.
		Gauge bosons are described mathematically, for technical reasons such as (Click link for more info and facts about gauge invariance) gauge invariance, by (A piece of land cleared of trees and usually enclosed) field equations for massless particles.
	www.absoluteastronomy.com /encyclopedia/g/ga/gauge_boson.htm (414 words)

	Gauge bosons (Site not responding. Last check: 2007-09-14)
		bosons gauge boost gauge pressure gauge gauge shotgun gauge rake camber gauge temperature gauge caster camber gauge level gauge sensor osborne miter gauge pivot boost gauge propane pressure gauge
		Fermions and Bosons A set of notes on fermions and bosons, including a review of angular momentum in quantum mechanics.
		Goldstone Bosons These notes review the effective lagrangian treatment of Goldstone and pseudo-Goldstone bosons, taking examples from high-energy/nuclear and condensed-matter physics.
	www.serebella.com /encyclopedia/article-Gauge_bosons.html (575 words)

	particle physics - Hutchinson encyclopedia article about particle physics
		Subatomic particles include the elementary particles (quarks, leptons, and gauge bosons), which are indivisible, so far as is known, and so may be considered the fundamental units of matter; and the hadrons (baryons, such as the proton and neutron, and mesons), which are composite particles, made up of two or three quarks.
		Yukawa's theory was largely superseded from 1973 by the theory of quantum chromodynamics, which postulates that the strong nuclear force is transmitted by the exchange of gauge bosons called gluons between the quarks and antiquarks making up protons and neutrons.
		The existence of the gauge bosons that carry this force, the W and Z particles, was confirmed in 1983 at CERN, the European nuclear research organization.
	encyclopedia.farlex.com /particle+physics (882 words)

	[No title]
		Some people call the X and Y bosons leptoquarks, since they mediate reactions that convert leptons to quarks, and vice versa, but I think this is a misleading name, since it implies they are similar to leptons and quarks.
		X and Y bosons are bosons, and are thus totally different from leptons and quarks, which are fermions.
		bosons with the predicted masses at CERN in 1983, the progress of particle physics has been an enthusiastic rush of both theoretical and experimental advancement, inextricably intertwined, as theoretical predictions were immediately confirmed by experiment, and experimental puzzles were quickly explained by new theories.
	www.geocities.com /jefferywinkler/beyondstandardmodel.html (3275 words)

	Physics 226 Fall 2001 Lectures
		Gauge theories are a special class of quantum field theories where there is an invariance principle that necessarily requires the existence of interactions among the particles.
		Gauge forces mean forces which respect a gauge symmetry and in addition, forces whose strengths are proportional to a "charge" of some kind.
		Gravitons, gauge bosons for gravity, interact too weakly to be detected singly; their existence and properties are inferred from the structure of the theory, in the same way that quantum electrodynamics leads to a photon.
	www-cdf.fnal.gov /upgrades/lp01/lec1_1.html (1678 words)

	The Standard Model (Site not responding. Last check: 2007-09-14)
		Gauge invariance is a powerful symmetry that tames uncontrollable infinities in quantum amplitudes and encodes the rich symmetry structure of conserved charges observed in elementary particle physics.
		The massless gauge field of this theory is known as the gluon.
		The resulting theory has massive gauge bosons but still retains the nice properties of a fully gauge invariant theory where the gauge bosons would normally be massless.
	superstringtheory.com /experm/exper2a.html (760 words)

	Re: Sgoldstino
		The massterm of these bosons has "the wrong sign" so that you have to chose a different value than 0 as the vacuum-expectation value of these fields because the solution phi=0 is unstable due to the "wrong sign" of the mass term.
		This means that gauge invariance is spontaneously broken, i.e., the equations of motion are gauge invariant but not the vacuum solution for the fields.
		This means the would-be Goldstone bosons are "eaten up" by the gauge bosons in the sense that they contribute as the third field degree of freedom for any gauge boson.
	www.lns.cornell.edu /spr/2001-07/msg0033982.html (520 words)

	Boson
		Gauge bosons are elementary particles which act as the carriers of the fundamental forces.
		This explains the spectrum of fl-body radiation and the operation of lasers, the properties of liquid Helium-4 and superconductors and the possibility of bosons to form Bose-Einstein condensates, a particular state of matter.
		Because bosons do not obey the Pauli exclusion principle, it is much harder to form stable structures with bosons than with fermions.
	www.sciencedaily.com /encyclopedia/boson (263 words)

	Bosons and Fermions (Site not responding. Last check: 2007-09-14)
		The two types are known as "bosons" and "fermions," and the dialectic between them describes all physical form.
		Identical particles have special quantum interactions, and the two ontological classes have fundamentally different natures: bosons are gregarious, and fermions are solitary.
		Bosons may overlap in the same quantum state, and in fact the more bosons that are in a state the more likely that still more will join.
	www.nonlocal.com /hbar/bosonfermion.html (381 words)

	SUPERSTRINGS! Glossary
		Bosons have integral quantum numbers of spin: 0,1,2,etc. They obey Bose statistics in that an arbitrary number bosons can occupy the same quantum state.
		The allowed gauge transformations are dictated by a set of the rules which form the gauge group of the theory.
		It is mediated by W and Z bosons and is described by a spontaneously broken SU(2) gauge theory.
	www.sukidog.com /jpierre/strings/glossary.htm (930 words)

	Gluon - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-09-14)
		Usually vector particles have three spin states, but gauge invariance reduces the number of spin states of a gluon to two.
		In quantum field theory, unbroken gauge invariance requires that gauge bosons have zero mass (although the experimental limit for gluon mass is a few MeV).
		Unlike the single photon of QED or the three W and Z bosons of the weak interaction, there are 8 independent types of gluon in QCD.
	www.bexley.us /project/wikipedia/index.php/Gluon (389 words)

	Gauge boson - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-09-14)
		The Gauge Boson is a type of Boson, or subatomic elementary particle which acts as a carrier of the fundamental forces.
		Unlike other forces, gravity is not described by a gauge theory but rather by general relativity and gravitons have spin equal to two.
		The number of distinct gauge bosons carrying a force is equal to the number of generators of its gauge group.
	www.peacelink.de /index.php?title=Gauge_bosons&redirect=no (132 words)

	Unification and distance scales (Site not responding. Last check: 2007-09-14)
		The initial gauge invariance in the theory is SU(2)xU(1), with three massless gauge bosons from SU(2) and one from U(1).
		In the end there has to be only one massless gauge boson -- the photon that carries the electromagnetic force -- and three massive gauge bosons mediating the short range weak nuclear force.
		Therefore, three massless scalar normal modes (also known as Goldstone bosons) are needed to serve as longitudinal modes to turn the four massless gauge bosons into one massless gauge boson and three massive gauge bosons.
	superstringtheory.com /experm/exper3a1.html (899 words)

	Electroweak Bosons (Site not responding. Last check: 2007-09-14)
		Due to the presence of SU(2), a non-abelian group, self-interactions occur between the gauge bosons.
		In the Landau gauge it is chosen 0, in the Feynman gauge it is 1.
		The propagators of the gauge bosons and of the scalars are shown in figures 23 and 24, respectively.
	www.nikhef.nl /~henkjan/astro/node38.html (576 words)

	NOVA \| The Elegant Universe \| Elementary Particles (non-Flash) \| PBS
		Particle physicists expected the weak gauge bosons to be massless particles.
		The Higgs boson, named after the man who postulated its existence, Peter Higgs, explains why the weak gauge bosons are not massless particles.
		The four forces, which are carried by bosons and operate over different distances, vary in strength, with the strong force being the strongest and gravity weakest.
	www.pbs.org /wgbh/nova/elegant/part-nf.html (2051 words)

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