Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Meson> ?p ?o }
- Meson abstract "In particle physics, mesons (/ˈmiːzɒnz/ or /ˈmɛzɒnz/) are hadronic subatomic particles composed of one quark and one antiquark, bound together by the strong interaction. Because mesons are composed of sub-particles, they have a physical size, with a diameter of roughly one fermi, which is about 2⁄3 the size of a proton or neutron. All mesons are unstable, with the longest-lived lasting for only a few hundredths of a microsecond. Charged mesons decay (sometimes through intermediate particles) to form electrons and neutrinos. Uncharged mesons may decay to photons.Mesons are not produced by radioactive decay, but appear in nature only as short-lived products of very high-energy interactions in matter, between particles made of quarks. In cosmic ray interactions, for example, such particles are ordinary protons and neutrons. Mesons are also frequently produced artificially in high-energy particle accelerators that collide protons, anti-protons, or other particles.In nature, the importance of lighter mesons is that they are the associated quantum-field particles that transmit the nuclear force, in the same way that photons are the particles that transmit the electromagnetic force. The higher energy (more massive) mesons were created momentarily in the Big Bang, but are not thought to play a role in nature today. However, such particles are regularly created in experiments, in order to understand the nature of the heavier types of quark that compose the heavier mesons.Mesons are part of the hadron particle family, and are defined simply as particles composed of two quarks. The other members of the hadron family are the baryons: subatomic particles composed of three quarks rather than two. Some experiments show evidence of exotic mesons, which do not have the conventional valence quark content of one quark and one antiquark.Because quarks have a spin of 1⁄2, the difference in quark-number between mesons and baryons results in conventional two-quark mesons being bosons, whereas baryons are fermions.Each type of meson has a corresponding antiparticle (antimeson) in which quarks are replaced by their corresponding antiquarks and vice versa. For example, a positive pion (π+) is made of one up quark and one down antiquark; and its corresponding antiparticle, the negative pion (π−), is made of one up antiquark and one down quark.Because mesons are composed of quarks, they participate in both the weak and strong interactions. Mesons with net electric charge also participate in the electromagnetic interaction. They are classified according to their quark content, total angular momentum, parity and various other properties, such as C-parity and G-parity. Although no meson is stable, those of lower mass are nonetheless more stable than the most massive mesons, and are easier to observe and study in particle accelerators or in cosmic ray experiments. They are also typically less massive than baryons, meaning that they are more easily produced in experiments, and thus exhibit certain higher energy phenomena more readily than baryons composed of the same quarks would. For example, the charm quark was first seen in the J/Psi meson (J/ψ) in 1974, and the bottom quark in the upsilon meson (ϒ) in 1977.".
- Meson thumbnail Meson_nonet_-_spin_0.svg?width=300.
- Meson wikiPageExternalLink CM-P00073662.pdf.
- Meson wikiPageExternalLink cronin-lecture.pdf.
- Meson wikiPageExternalLink fitch-lecture.pdf.
- Meson wikiPageExternalLink eng.pdf.
- Meson wikiPageExternalLink CDF_meson.html.
- Meson wikiPageExternalLink 0211411.
- Meson wikiPageExternalLink c1.
- Meson wikiPageExternalLink pdg.lbl.gov.
- Meson wikiPageExternalLink namingrpp.pdf.
- Meson wikiPageExternalLink DZeroB_s.html.
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- Meson wikiPageWikiLink Ancient_Greek.
- Meson wikiPageWikiLink Angular_momentum.
- Meson wikiPageWikiLink Angular_momentum_operator.
- Meson wikiPageWikiLink Antiparticle.
- Meson wikiPageWikiLink Atomic_nucleus.
- Meson wikiPageWikiLink Baryon.
- Meson wikiPageWikiLink Baryon_number.
- Meson wikiPageWikiLink Belle_experiment.
- Meson wikiPageWikiLink Big_Bang.
- Meson wikiPageWikiLink Boson.
- Meson wikiPageWikiLink Bottom_quark.
- Meson wikiPageWikiLink Bottomness.
- Meson wikiPageWikiLink C._F._Powell.
- Meson wikiPageWikiLink CP_violation.
- Meson wikiPageWikiLink C_parity.
- Meson wikiPageWikiLink Carl_David_Anderson.
- Meson wikiPageWikiLink Category:Mesons.
- Meson wikiPageWikiLink Charm_(quantum_number).
- Meson wikiPageWikiLink Charm_quark.
- Meson wikiPageWikiLink Cosmic_ray.
- Meson wikiPageWikiLink César_Lattes.
- Meson wikiPageWikiLink Decay_product.
- Meson wikiPageWikiLink Dirac_equation.
- Meson wikiPageWikiLink Dover_Publications.
- Meson wikiPageWikiLink Electric_charge.
- Meson wikiPageWikiLink Electromagnetism.
- Meson wikiPageWikiLink Electron.
- Meson wikiPageWikiLink Electronvolt.
- Meson wikiPageWikiLink Elementary_charge.
- Meson wikiPageWikiLink England.
- Meson wikiPageWikiLink Euclidean_vector.
- Meson wikiPageWikiLink Eugene_Wigner.
- Meson wikiPageWikiLink Exotic_meson.
- Meson wikiPageWikiLink Femtometre.
- Meson wikiPageWikiLink Fermion.
- Meson wikiPageWikiLink Flavour_(particle_physics).
- Meson wikiPageWikiLink G-parity.
- Meson wikiPageWikiLink Gell-Mann–Nishijima_formula.
- Meson wikiPageWikiLink Giuseppe_Occhialini.
- Meson wikiPageWikiLink Gravity.
- Meson wikiPageWikiLink Ground_state.
- Meson wikiPageWikiLink Hadron.
- Meson wikiPageWikiLink Hadron_spectroscopy.
- Meson wikiPageWikiLink Hideki_Yukawa.
- Meson wikiPageWikiLink Ishfaq_Ahmad.
- Meson wikiPageWikiLink Isospin.
- Meson wikiPageWikiLink psi_meson.
- Meson wikiPageWikiLink John_Wiley_&_Sons.
- Meson wikiPageWikiLink LHCb.
- Meson wikiPageWikiLink Lepton.
- Meson wikiPageWikiLink List_of_mesons.
- Meson wikiPageWikiLink List_of_particles.
- Meson wikiPageWikiLink Longman_Publishing.
- Meson wikiPageWikiLink Ludwig_Maximilian_University_of_Munich.
- Meson wikiPageWikiLink Mass.
- Meson wikiPageWikiLink Mesonic_molecule.
- Meson wikiPageWikiLink Muon.
- Meson wikiPageWikiLink Murray_Gell-Mann.
- Meson wikiPageWikiLink Natural_units.
- Meson wikiPageWikiLink Neutrino.
- Meson wikiPageWikiLink Neutron.
- Meson wikiPageWikiLink Nobel_Foundation.
- Meson wikiPageWikiLink Nobel_Prize_in_Physics.
- Meson wikiPageWikiLink Nonet.
- Meson wikiPageWikiLink Nuclear_force.
- Meson wikiPageWikiLink Oxford_University_Press.
- Meson wikiPageWikiLink Parity_(physics).
- Meson wikiPageWikiLink Particle_Data_Group.
- Meson wikiPageWikiLink Particle_accelerator.
- Meson wikiPageWikiLink Particle_physics.
- Meson wikiPageWikiLink Photon.
- Meson wikiPageWikiLink Physical_Review.
- Meson wikiPageWikiLink Physical_Review_Letters.
- Meson wikiPageWikiLink Physics_Letters.
- Meson wikiPageWikiLink Pion.
- Meson wikiPageWikiLink Planck_constant.
- Meson wikiPageWikiLink Proton.
- Meson wikiPageWikiLink Pseudoscalar_meson.
- Meson wikiPageWikiLink Pseudovector_meson.
- Meson wikiPageWikiLink Quantum_field_theory.
- Meson wikiPageWikiLink Quantum_state.
- Meson wikiPageWikiLink Quantum_superposition.