Flavour (particle physics)

physical property that quantifies an object's interaction with electric fields

one third of the difference between the number of quarks and antiquarks in a system

type of elementary particles occurring in the Standard Model

In nuclear physics and particle physics, isospin is a quantum number related to the up- and down quark content of the particle. Isospin is also known as isobaric spin or isotopic spin. Isospin symmetry is a subset of the flavour symmetry seen more broadly in the interactions of baryons and mesons.

conserved quantum number representing the number of leptons minus the number of antileptons in an elementary particle reaction

In particle physics, strangeness (symbol S) is a property of particles, expressed as a quantum number, for describing decay of particles in strong and electromagnetic interactions that occur in a short period of time. The strangeness of a particle is defined as: S = -(n_\text{s} - n_{\bar{\text{s}) where n represents the number of strange quarks () and n represents the number of strange antiquarks (). Evaluation of strangeness production has become an important tool in search, discovery, observation and interpretation of quark–gluon plasma (QGP). Strangeness is an excited state of matter and i

quantum number of elementary particles

flavour quantum number representing the difference between the number of charm quarks and charm antiquarks that are present in a particle

quantum number (difference between the baryon number and the lepton number), conserved in some grand unified theories even when baryon and lepton numbers are not separately conserved

Topness (symbol T) or truth is a flavour quantum number that represents the difference between the number of top quarks (t) and number of top antiquarks () present in a particle: T = n_\text{t} - n_\bar{\text{t

In physics, bottomness (symbol B′; using a prime as plain B is used already for baryon number) or beauty is a flavour quantum number reflecting the difference between the number of bottom antiquarks (n) and the number of bottom quarks (n) that are present in a particle: B^\prime = -(n_b - n_{\bar b})