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n. Abbr. I
A quantum number related to the number of charge states of a baryon or meson.

[iso(topic) + spin.]


(General Physics) an internal quantum number used in the classification of elementary particles. Particles which have very similar properties except for those associated with their charge are regarded as forms of the same fundamental particle with different components of the isospin in a certain direction in an imaginary space. Also called: isobaric spin or isotopic spin

i′sotop′ic spin′

a quantum number that is related to the number of different values of electric charge that a given kind of baryon or meson may have. Symbol: I Also called isospin.
References in periodicals archive ?
Secondly, I propose to determine how to include isospin breaking effects in the calculation of the anomalous magnetic moment of the muon and meson leptonic and semi-leptonic decay rates.
Y] acting on the two SU(2) weak isospin flavor states [+ or -] 1/2 in each lepton family and each quark family.
my]] que no la tratamos en detalle, pero indicamos que a partir de esta surgen caracteristicas importantes como la hipercarga (Y) y las corrientes de isospin.
C'est d'abord une elaboration mathematique, qui implique la theorie des groupes de symetrie pour les grandeurs quantiques qui representent les "proprietes" des particules (operateurs des diverses "saveurs", isospin, etrangete, etc.
Among the topics are no-core shell model and reactions, direct reactions with exotic nuclei, isoscaling and symmetry energy in dynamical fragment formation, "pasta" phases in dense stars, and isospin effects on fragmentation mechanisms.
In the case of the strong interaction, the gauge symmetry is the isospin symmetry--the strong interactions are invariant under rotations in the isospin space).
superallowed [beta]-transitions within isospin triplets provided the relevant nuclear physics corrections may be applied with confidence [5].
Por ejemplo, en la interaccion fuerte entre neutrones y protones se conservan, aparte de la paridad, magnitudes tales como la masa llamada barionica (numero total de protones y neutrones), el isospin y la hipercarga, que no se conservan en la interaccion electrodebil.
Johnson orders his story around the progression of theories and discoveries in quantum thinking, providing an extraordinary wealth of detail on such recondite topics as particle parity, mathematical renormalization, isospin, and quantum chromodynamics.
He suggested an isospin source might render the results of all fifth force experiments compatible, which prompted other researchers to test the hypothesis.
Experiments have determined that the left-handed EW isospin flavor states are linear superpositions of mass eigenstates.