Why strong interaction is short-range force?

In summary, the gluon does not interact with itself and the strong nuclear force is due to the short range interaction between quarks.
  • #1
magnetar
83
0
Gluon is massless particle ,why strong interaction is short-range force?
 
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  • #2
There are two explanations.

Those that believe the universe is not discrete (i.e. they believe the there is such a thing as a continuum and a manifold), believe that the fields and dimensions involved are non-linear and/or curved near the nucleons.

i suspect the universe is discrete, and the stong nuclear force is because there is some alteration that occurs in one nucleon when it is near another, such as rotational phase. For example, it might be like tiny gears meshing their teeth when they are close, where the teeth are intervals (what we call gluon exchanges).
 
  • #3
Because the strong interaction is non-abelian : gluons interact with themselves, and the vacuum screens the interaction at long distances. In the so called "dual superconducting model" or "flux tube" models, the potential grows enough at long distances to create new particles.
 
  • #4
magnetar said:
Gluon is massless particle ,why strong interaction is short-range force?

They are "masseless" only in a linear approximation. In fact the equations are strongly non-linear so the linear approximation is quite misleading. The interaction cannot be neglected without loss of essential physical effects (strong coupling). See, for example, "Reformulation instead of renormalizations" by Vladimir Kalitvianski (http://arxiv.org/abs/0811.4416).

Bob_for_short.
 
  • #5
Humanino's answer is correct - the gluons interact with themselves, so you get a different behavior than with photons which don't interact with themselves. As he points out, there are many models of this kind of behavior, but the details shouldn't obscure the main point: because of these self-interactions, the field falls off faster than 1/r2.

You don't need to posit a discrete universe (this behavior occurs without one) and the details of regularization are unimportant in understanding this.
 
  • #6
magnetar said:
Gluon is massless particle ,why strong interaction is short-range force?

The masses attributed to gluons and quarks cannot be used in the range relationship to predict the range of the force due to a property called confinement. That is. they are always contained within the proton or neutron. know that anything coming out of the nucleon is a quark antiquark pair and not a quark or gluon. It is the pion that is used to determine the range of the force and it's a lepton (still have mass).

Got it!
 
  • #7
Abbas Sherif said:
. It is the pion that is used to determine the range of the force and it's a lepton (still have mass).

Got it!


No the pion is not a lepton
 
  • #8
It is pion right and have a mass of 140 Mev and a range of 1.7fm according to Meson Theory.But they are not leptons intead they are Categorized as mesons of spin-0.
For reference request see Concepts of Modern Physics McGrawHill Arthur Beiser pages(410 and 482)
 
  • #9
malawi_glenn said:
No the pion is not a lepton
Thanks guy. I meant to say meson(this is obvious the mass accounts for the range. In fact we know that the strong interaction will not act between leptons since leptons have no color.

Guy you are good!
 

1. What is the strong interaction?

The strong interaction, also known as the strong nuclear force, is one of the four fundamental forces of nature. It is responsible for holding together the nucleus of an atom by overcoming the electromagnetic repulsion between positively charged protons.

2. Why is the strong interaction considered a short-range force?

The strong interaction is considered a short-range force because it only acts within a very limited distance, around the size of a nucleus. Beyond this distance, the force rapidly decreases to zero, making it negligible on a larger scale.

3. How does the strong interaction differ from the other fundamental forces?

The strong interaction is significantly stronger than the other fundamental forces, such as gravity and electromagnetism. It also has a very short range compared to the other forces, which can act over much longer distances.

4. What particles are responsible for the strong interaction?

The strong interaction is mediated by particles called gluons, which are exchanged between quarks (the building blocks of protons and neutrons) to hold them together. Quarks also carry a property called color charge, which is responsible for the strong force.

5. Why is the strong interaction important for understanding the structure of matter?

The strong interaction is crucial for understanding the structure of matter because it is responsible for the binding of protons and neutrons in the nucleus, which make up the majority of an atom's mass. It also plays a role in the formation of larger particles, such as protons and neutrons, which make up the building blocks of all matter.

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