Questions tagged [confinement]
Color confinement is the concept that particles that possess color charges (quarks and glouns) can not be found freely, and only color-free combinations can be observed.
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Does QCD confinement modify the effective phase accumulation rate of light quarks relative to their current mass?
In quantum mechanics a free particle accumulates phase at a rate set by its mass via e^{-imt}. For quarks there are two distinct mass parameters in QCD: the current quark mass (the bare mass parameter ...
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How do we know individual quarks don't carry all three color charges?
AI says color charge is essentially circulated between quarks via gluons mitigating the strong force interaction, and that a quark can only have one color charge at a time.
How do we know this is true,...
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Do we know empirically that electrons have no color charge?
Everything has a gravitational field, so everything is gravitationally charged.
Everything has an electromagnetic field (including quarks), so everything is electromagnetically charged.
Only quarks ...
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Does the colour force between two quarks get stronger because gluons emit more gluons or because quarks emit more gluons?
Does the colour force between two quarks moving apart get stronger because gluons emit more gluons or because quarks emit more gluons?
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In the standard model, is it a coincidence that $\Lambda_{QCD}$ is at the electroweak scale?
From what I understand, the color confinement scale $\Lambda_{QCD}$ is a dimensional parameter of "pure QCD" (as stated for example here), which is entirely independent of the Higgs ...
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Confinement energy scale and boosts
Imagine a reference system where a certain proton is standing still in front of us. We measure its energy and we realize it's very low, so that the strong coupling constant $\alpha_s$ is pretty high ...
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Is color confinement a strict theoretical rule, or is it rather an assumption? [duplicate]
My question is actually quite simple, so I avoid going into technicalities.
The theory of color confinement states that there can’t be individual color charges, and all particles that manifest ...
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The relation of confinement phase and scale in gauge theory
If one gauge theory has a confined phase, does this theory also have a scale? (eg. QCD has the confined phase and it also has the QCD scale)
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Why can Yang-Mills mass gap fully explain confinement?
Having a gap in the spectrum doesn't exclude massive free quarks. It only tells us that there can't be free gluons or other massless excitations in QCD. I saw this statement in the opening paragraph ...
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Does the QCD effective force go to zero at high energies?
Admittedly, I'm not overly familiar with the nature of QCD experimental evidence but from what I gather it's pretty well established that experimentally quarks behave like free particles at high ...
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Gauss law, gauge and global symmetries
I am reading Witten's paper on the confinement/deconfinement phase transition in $\mathcal{N}=4$ $\mathrm{SU}(N)$ SYM theory. I am a bit stuck at section "Confinement" at Finite Volume, page ...
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Confinement, Holographic QCD, Seiberg-Witten Theory
I have seen a bunch of articles that all try to show confinement using AdS/QCD or Holographic QCD method.
I pretty much know that the lastest attempt to prove confinement based on breaking SUSY even ...
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How to avoid the ordinary Coulomb solution in QCD?
To see where QCD starts to differ from the behavior of EM fields, we might begin by looking at the classical field. A search brings up
[question 339978] and [question 360061] but no answer is found ...
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Instantons in the Global $O(2)$ Model (Compact scalar field) - Polyakov textbook
This question is related with Polyakov, "Gauge Fields and Strings" section 4.2
In section 4.2, partition function is
\begin{equation}
Z=\sum_{n_{x,\delta}}\int_{-\pi}^{\pi}\prod_x\frac{d\...
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Is color charge internal symmetry or global symmetry?
I was told the color charge in the standard model could not be observed directly. This sounded like the gauge field $\vec A$ in the electromagnetism. However, it is a discrete charge and does have ...
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