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Encyclopedia > Internucleon interaction

The nuclear force (or inter-nucleon potential) is the force between two or more nucleons. It affects the binding of nucleons into nuclei and the scattering of two nucleons. The force depends not only on the distance between two nucleons, but also on their relative velocity, and on their isospin. In physics a nucleon is a collective name for the two baryons the neutron and the proton. ... In physics a nucleon is a collective name for the two baryons the neutron and the proton. ... Plural: nuclei In chemistry and physics, the nucleus (atomic nucleus) is the collection of protons and neutrons in the center of an atom that carries the bulk of the atoms mass and positive charge. ... Isospin (isotopic spin, isobaric spin) is a physical quantity which is mathematically analogous to spin. ...


There has been a lot of work on understanding and parametrizing the internucleon potential. The long-range part of this force is of the form of an Yukawa potential due to the exchange of pions. A Yukawa potential (also called a screened Coulomb potential) is a potential of the form Hideki Yukawa showed in the 1930s that such a potential arises from the exchange of a massless scalar field such as the field of the pion whose mass is . ... In particle physics, pion (short for the Greek pi meson = P middle) is the collective name for three subatomic particles discovered in 1947: π0, π+ and π−. Pions are the lightest mesons. ...


Sometimes the nuclear force is called the residual strong force, in contradistinction to the strong interactions which are now understood to arise from Quantum chromodynamics. This phrasing was forced during the 1970s due to a change in paradigm. Before that time, the strong nuclear force refererred to the inter-nucleon potential. After the introduction of the quark model, strong interaction came to mean QCD. Whatever the history, the phrase could be misleading today. Since nucleons have no colour charge, the nuclear force does not involve the force carriers of quantum chromodynamics, ie, the gluons. The strong interaction (sometimes called the strong force) is nowadays understood to mean the interactions between quarks and gluons which is decribed by quantum chromodynamics. ... Quantum chromodynamics (QCD) is the physical theory describing one of the fundamental forces, the strong interaction. ... The quark model is a classification scheme for hadrons in terms of their valence quarks, ie, the quarks (and antiquarks) which give rise to the quantum numbers of the hadrons. ... In quantum chromodynamics (QCD), color or color charge refers to a certain property of the subatomic particles called quarks. ... Quantum chromodynamics (QCD) is the physical theory describing one of the fundamental forces, the strong interaction. ...


  Results from FactBites:
 
Strong interaction - Wikipedia, the free encyclopedia (424 words)
The strong interaction or strong force is today understood to represent the interactions between quarks and gluons as detailed by the theory of quantum chromodynamics (QCD).
The strong force is the fundamental force mediated by gluons, acting upon quarks, antiquarks, and the gluons themselves.
The strength of the interaction is parametrized by the strong coupling constant.
Nucleon - Wikipedia, the free encyclopedia (1298 words)
Understanding the nucleons' properties is one of the major goals of quantum chromodynamics, the modern theory of strong interactions.
The proton is the lightest baryon and its stability is a measure of baryon number conservation.
Both time reversal and parity invariance of the strong interactions implies that the neutron's electric dipole moment must be zero; the current observational bound is that it is less than 0.63×10
  More results at FactBites »

 
 

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