What is the strength of the strong force in N units

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Discussion Overview

The discussion revolves around the strength of the strong force, particularly in terms of its measurement in Newtons and its characteristics at the subatomic level. Participants explore the nature of the strong interaction, its effective area, and the implications of its strength in various contexts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions the pressure of the strong force and suggests considering the effective area it acts upon, possibly referring to nuclear cross-section area.
  • Another participant argues that at the scales relevant to the strong force, it is more accurate to discuss the strong interaction rather than forces.
  • A participant provides a rough calculation indicating that the typical energy of the strong interaction divided by its length scale yields a value of 16000 N, although they clarify that this does not represent a force acting on an object.
  • It is noted that the strength of the strong force is often expressed in terms of \alpha_s, which varies with momentum transfer, with values close to 1 at low energies and around 0.1 near the mass of the Z boson. There are speculations regarding \alpha_s approaching \alpha at infinite momentum transfer.

Areas of Agreement / Disagreement

Participants express differing views on how to conceptualize the strong force, with some emphasizing the nature of the strong interaction over traditional force measurements. The discussion includes multiple perspectives without a clear consensus on the best way to quantify or describe the strong force.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the nature of forces at subatomic scales and the definitions of terms like pressure and effective area in this context. The calculations presented are rough estimates and depend on specific conditions.

Dilema
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In addition.
1. what is the presure of this force (alternativly wat is the efferctiv area it is acting on?...nucleai corrss section area?).
 
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At the scales over which the strong force is relevant, it is not really appropriate to speak about forces. It is more accurate to talk about the strong interaction.
 
The typical length scale of the strong interaction is 1 femtometer, and the typical energy is 100 MeV. If you divide the two, you get 16000 N. This is not a force on anything, but it gives a rough idea how strong the strong interaction is.
A crane can exert the same force on an object (e. g. to lift a car) - but the crane is made out of 1030 atoms, not just a single nucleus.
 
The strength of the strong force is usually given in terms of \alpha_s, the strong equivalent of the electromagnetic fine structure constant \alpha. A difference between them is that \alpha_s has a strong variation with momentum transfer in a given process.
\alpha_s is close to 1 at low energies, important for quark model and nuclear static properties, and about 0.1 around the mass of the Z vector boson. There are theoretical speculations that \alpha_s would approach \alpha as the momentum transfer became infinite.
 

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