Questions tagged [strong-force]
The strong force or interaction is responsible for the confinement of quarks inside hadrons and the binding of nucleons inside a nucleon, and it is described by the gauge theory of QCD. It provides most of the mass of ordinary matter, which is dominated by the nucleons, proton and neutron: over 99% of the mass of these is attributable to the strong-force field energy. Use where technical details of QCD are not warranted.
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Can data be transferred using the strong force?
We send data using the electromagnetic force, mainly over the form of radio waves, though this could be and is (mostly for human viewing of images) done with visible light. However, I want to know if ...
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'Forces' enacted by hot neutrons in fusion bomb - Pauli exclusion
Are Pauli exclusion 'forces' on a neutron 100% electromagnetic (Lennard-Jones seems more acute relationship compared to electrostatic force)
If so does that neutrons have two forces between them - '...
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Can strong interaction be repulsive?
I know that the repulsion between nuclei is mostly caused by electrostatic repulsion and Pauli's exclusion principle. But in the sub-nucleus level, is there a condition where the strong interaction ...
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How do gluons bind the quarks together within the hadrons and mesons?
I was trying to know about the strong nuclear force within the nucleus and the books and websites told me that it is the gluons which carry the force, and now I am curious how the gluons carry this ...
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Do Atomic Nuclei Experience an Analog of Mechanical Fatigue?
I'm wondering about the force that holds atomic nuclei together. When I bend a paperclip back and forth, eventually the paperclip weakens and breaks in half.
Is it possible for the nuclear force to ...
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Does the J/$\Psi$ primarily decay into real gluons?
so apparently the this cool looking decay of the $J/\Psi$ particle is OZI suppressed, which was confusing to me, because the Particle Data Group (link) says that 64% of its decays are into 3 gluons (...
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Are there wavelengths associated with the weak field and strong field bosons?
Are there wavelengths associated with the weak field and strong field bosons? Anyone care to share their take on this?
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Is nuclear force a kind of strong interaction?
I'm trying to understand the role of Yukawa potential, and it seems to describe the nuclear force. But at the top of the article it says:
This article is about the force that holds nucleons ...
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Gravitational non-linearities and Dark Matter/Energy
I had read Significance of Gravitational Nonlinearities on the Dynamics of Disk Galaxies (https://arxiv.org/abs/1909.00095), was wondering
Is there good reason to think that gravitational non-...
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Does quarks always pulls each other?
Pions consist of quark and antiquark and strong force keeps them together.
So color charge and anticolor charge attracts each other.
But in proton we have 3 quarks and they also attract each other.
It ...
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Could electric dipoles within hadrons provide an alternate explanation for strong force? [closed]
We all know that hadrons such as proton and neutrons are made up of quarks and not all of the quarks have the same charge. This would suggest that they have a positive and negative side. In the case ...
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Cold fusion with ionized hydrogen and neutron radiation
Would bombarding ionized hydrogen gas with neutron radiation cause cold fusion as the neutrons have no electrostatic repulsion to overcome therefore making it much easier to get within range of the ...
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Why is color change between quarks without consequence?
As always I will preface this question with the fact that I only have a high school education, so I may be overlooking something, or unaware of something that is inherent to the question.
That being ...
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How can neutron be converted to proton and electron?
Since a neutron and a proton are made up of quarks and an electron is a lepton, how can a neutron yield an electron?
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How are quarks assigned color charge?
As always, I'll preface that I am wildly undereducated, so i may be overlooking something or be completely unaware of another relevant property.
Color Confinement dictates that to "assemble" a baryon ...
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Experimental proof for isospin conservation of strong interaction
I am having a surprisingly hard time to find direct experimental results for the (approx.) conservation of isospin in strong interactions. The canonical examples seem to be $\omega \! \to 3\pi^0$ and $...
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How does meson exchange work within large nuclei?
I read the Wikipedia page on Mesons and it mentioned that there both charged and uncharged Mesons that decay into neutrino/electrons and photons, respectively. Unfortunately it didn't elaborate on ...
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Can a magnet rip protons from a nucleus?
Pretty self explanatory. I’m wondering if the strong nuclear force could be overcome by a strong enough magnet?
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Confusions with gluons. How many of them are there?
Gluons are bicolored objects. They are made out of one color and one anticolor. Therefore, there seems to be nine possible states $r\bar{r},r\bar{b},r\bar{g},b\bar{r},b\bar{b},b\bar{g},g\bar{r},g\bar{...
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Role of the Yukawa potential
What is the Yukawa potential converging to zero? Afaik the strong potential rises with the distance between quarks, hence, it should rise accordingly.
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Asymptotic freedom and momentum exchange
Why is the momentum exchange very high for low distances?
For sufficiently short distances or large exchanges of momentum
https://en.wikipedia.org/wiki/Asymptotic_freedom
While I think about ...
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Asymmetry in p-p, n-n and n-p interactions
Why does the asymmetry exist between the proton-proton, neutron-neutron and neutron-proton strong interactions in the nucleus (which results in nuclei preferring equal numbers of neutrons and protons)?...
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Is there a radiation equivalent in the strong and weak forces?
I know that light is electromagnetic radiation (sourced by accelerating charge) and gravitational waves are gravitational radiation (sourced by accelerating mass).
Is there equivalent radiation for ...
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How are length and time scales for the different kinds of interactions (strong, weak, electroweak) determined?
I was recently asked what the length scale of the strong interaction is and found my self a bit lost at the question. A quick Google search revealed a result of $10^{-15}\,\text{m}\approx 1\,\text{GeV}...
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Why don't green and anti-green gluons immediately annihilate each other?
I can't believe I haven't found an answer elsewhere.....
I have read repeatedly about blue/anti-blue gluons, etc., but no reason as to why they don't destroy each other immediately.....
Or maybe they ...
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Strangeness Conservation
I am stuck as to how to prove that strangeness is conserved in electromagnetic and strong interactions, while it is not conserved in weak interactions. I know that this can be shown by studying the ...
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How does the strong interaction “create” the nuclear force?
I’ve recently read that the strong interaction, that holds the quarks together to form protons and neutrons, also creates a residual force called the nuclear force, which holds the neutrons and ...
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Why do we think of a nucleus as nucleons held together by a strong force rather than a cluster of quarks? [duplicate]
The implication of this point of view is that protons and neutrons retain their structure in a nucleus. That is the 3 quarks making up nucleons still closely interact and interactions with quarks from ...
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What is meant by "Since the exchange of (mesons) occurs frequently, the nuclear force is stronger than the electromagnetic force"?
This is from a book written by Y. Nambu.
What role does the mass of mesons (versus mass of photons) have in making the strong force strong? How does this relate to "frequent exchanges" of mesons? ...
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Why does charmonium (and phi mesons) not decay via quark and antiquark annihilation?
The decay of heavy quark/antiquark pairs (say $c\bar{c}$, $s\bar{s}$) is supposedly 'suppressed because of the Zweig/OZI rule', see for instance Phi meson.
And they certainly have a longer lifetime ...
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Yukawa force vs Nuclear force
I have read these questions:
Are Neutrons and anti-Neutrons attracted to each other over distance?
Where John Rennie says:
Neutrons and anti-neutrons repel each other with a Yukawa force ...
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Binding energy and strong force
If binding energy is responsible for holding nucleons together than what is meaning of strong force?
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Why is the decay $\rho ^+ \rightarrow \rho ^0 \pi^+$ allowed by parity conservation and angular momentum conservation?
In the following decay:
$$\rho ^+ \rightarrow \rho ^0 \pi^+$$
where $\rho^+$ and $\rho^0$has $J^P = 1^-$ and $\pi^+$ has $J^P = 0^-$
The parity conservation $P$ entails that $L$ (orbital angular ...
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Is the (range of the) strong force the same for nucleons and quarks?
In high school, I learnt that the strong force held the nucleus together. It had a very short range and was repulsive at small separation distances to prevent the nucleons from collapsing.
Now I am ...
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If binding energy (from mass defect) is essentially the strong nuclear force maintaining the nucleus, why is it released?
I am aware that during nuclear fusion for light elements and nuclear fission for heavy elements, the resultant elements have less mass than the original reacting elements (ie the mass defect) because ...
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Why does the nucleus not repel itself? [duplicate]
If the nucleus is densely positively charged, why don’t the protons in the nucleus repel from each other and move towards the orbiting electrons?
Because each proton is not only being repelled by the ...
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Gluons pions and the strong nuclear force
Within Baryons is the force holding them together purely gluons or are pions involved?
Between protons and neutrons in a nuclei is it purely the exchange of pions between baryons which hold the ...
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Strong force and radioactivity [duplicate]
Why does adding more neutrons to an atom unstabilise it? Won’t adding more neutrons increase the strong force and thus knit the nucleus more tightly? Or is it because it’s being added in a particular ...
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Do gluons interact with each other by the strong foce?
I learned that strong force between quarks are mediated by gluons. What does this say about interactions between gluons? Do they interact with each other by the strong force?
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Why does literature list the strong coupling at the scale of the Z-boson's mass?
In the 2004 edition of the book "QCD as a Theory of Hadrons" by S. Narison, the author provides a value for the strong coupling at a scale of the mass of the Z boson,
$$ \alpha_s (M_Z) = 0.1181 \pm ...
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Energy conservation when exchanging meson
In Prob 1.2 of Griffith's "Introduction to Elementary Particles" 2nd ed., it says that:
However, I don't understand why it states that "they must temporarily violate the conservation of energy by ...
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Why do neutron stars with more mass have smaller volume?
I know about Heisenberg uncertainty which makes more localized neutrons have a wider range of undefined momentum, and Pauli exclusion principle which prohibit neutrons from getting too close or "...
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Is it possible for nucleons to overcome strong force?
I was wondering how it could be possible to artificially overcome the strong nuclear force, allowing for the nucleons to be released from each other.
If you can't think of any possible solution, is ...
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Binding Energy and mass defect
Binding energy is the energy required to separate the nucleus into its constituent particles. The thing is that I read in a book that the binding energy is also the energy equal to the mass defect.
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What drives the charge separation in atoms?
In atoms charges are neatly separated. Instead of pairing which seems natural they all stick together with their peers.
What drives this peer behaviour? Why is it stable?
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How does the nuclear interaction keep protons and neutrons together?
The strong force holds atoms hadrons together by using gluons to change the color charge of quarks and making the hadrons color nutral.
But how does the nuclear force keep protons together, I heard ...
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Why does the pion live in a representation of isospin SU(2) and is the mediator of the strong force generated by color SU(3)?
Why does the pion live in a representation of isospin $\rm SU(2)$ and is the mediator of the strong force generated by color $\rm SU(3)$?
I somehow find strange that this is the case. Given that $\rm ...
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Where do the color indices come back in $SU(3)$ Yang-Mills Quantization?
Can the partition function of $SU(3)$ (the Generic Partition function for a yang-mills theory found on the linked wiki page below), be split into a sum of 8 functional integrals for each gauge field?
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Does it really make sense to talk about the color of gluons?
It is my understanding that by enforcing SU(3) gauge invariance on our lagrangian of 3-colored quark fields, we are forced to accept the existence of 8 new massless vector fields, the gluons. The 8 ...
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