Meson
Meson Mes"on, n. [NL., fr. Gr. me`son middle, neut. of me`sos, a., middle.] 1. (Anat.) The mesial plane dividing the body of an animal into similar right and left halves. The line in which it meets the dorsal surface has been called the dorsimeson, and the corresponding ventral edge the ventrimeson. --B. G. Wilder. [1913 Webster]

2. (Physics) An elementary particle made up of two quarks; a hadron having a baryon number of zero; any hadron other than a baryon. Mesons are bosons with integral values of spin, having a mass intermediate between those of the electron and a nucleon; they may have positive or negative charges, or may be neutral. Mesons are of three types: the {pion} ([pi]-meson), {kaon} (K-mesons), and {[eta]-mesons}. [PJC]

{mu meson} (Physics) the former name for the {muon}, a particle which is not a true meson[2]. The term is no longer used in technical literature, except historically. [PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • méson — méson …   Dictionnaire des rimes

  • méson — [ mezɔ̃ ] n. m. • v. 1935; du gr. mesos « au milieu » ♦ Phys. Hadron formé d un quark et d un antiquark. Méson π (pi), 270 fois plus lourd que l électron (⇒ 3. pion) ; méson K (970 fois plus lourd). ⇒ kaon. ⊗ HOM. Maison. ● méson nom masculin Nom …   Encyclopédie Universelle

  • Meson — Méson  Pour l’article homophone, voir Maison. Un méson est, en physique des particules, une particule composite (c’est à dire non élémentaire) composée d un nombre pair de quarks et d antiquarks. Sommaire 1 Propriétés …   Wikipédia en Français

  • méson — s. m. [Física] Partícula subatômica constituída por um quark e por um antiquark, que se aniquilam mutuamente, descoberta nos raios cósmicos que tem uma massa compreendida entre a do elétron e a do próton. (Conhecem se vários tipos.) • [Brasil]… …   Dicionário da Língua Portuguesa

  • meson — meson; pho·to·meson; …   English syllables

  • mesón — sustantivo masculino 1. Establecimiento popular decorado de manera tradicional donde se sirven comidas y bebidas: Vamos a comer hoy al mesón del Arriero. 2. Área: historia Antigua posada para viajeros: Los mesones aparecen con frecuencia en la… …   Diccionario Salamanca de la Lengua Española

  • meson — (n.) subatomic particle, 1939, from Gk. mesos middle (see MEDIAL (Cf. medial) (adj.)) + subatomic particle suffix ON (Cf. on). Earlier mesotron (1938). So called for being intermediate in mass between protons and electrons …   Etymology dictionary

  • meson — ☆ meson [mes′än΄, mez′än΄; mā′sän΄, mā′zän΄; mē′uan, mē′sän΄, mē′zän΄ ] n. [< MES(OTR)ON] Particle Physics any of a group of subatomic particles that are both hadrons and bosons, including the pion and kaon mesonic [me sän′ik, mezän′ik;… …   English World dictionary

  • Meson — Mesons Mesons of spin 0 form a nonet Composition Composite Quarks and antiquarks Statistics Bosonic …   Wikipedia

  • Meson — Mesonen sind instabile subatomare Teilchen. Aufgebaut aus einem Quark Antiquark Paar, bilden sie eine der zwei Gruppen von Hadronen. Von der zweiten Hadronengruppe, den Baryonen, unterscheiden sich Mesonen durch ihren ganzzahligen Spin; sie sind… …   Deutsch Wikipedia

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