All Questions
Tagged with strong-force particle-physics
87
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How exactly does the strong interaction decrease with distance?
So, we all know that the strong force asymptotes but the thing is I've never gotten a good description as to why
Can someone explain;
How the Strong force weakens with distance? I think I have got ...
2
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1
answer
71
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How relevant is the electric charge of quarks within hadrons?
Given that each quark flavor has a particular electric charge (i.e., either +2/3 or -1/3): how do these charges effect the internal dynamics of hadrons? Do the attractive and repulsive effects of ...
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Kinetic energy of quarks in a proton
If we say that a proton has a kinetic energy of 50 GeV, can we say that each of the three quarks that compose it have roughly a mean energy of $\approx \frac{50}3=17$ GeV?
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3
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Collision of two positrons: Is there any "strong force" that binds two positrons together to produce a positron-positron pair with $+2e$?
I want to know if it is possible to hardly collide two positrons with each other to produce a pair with $+2e$. Indeed, I want to know if there is a strong force, similar to those binding protons ...
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Why is the electromagnetic force not an emergent property of the strong force? [closed]
Two up quarks in a proton lead to an imbalance, which results in the proton having the ability to attract electrons. Two down quarks in a neutron lead to balance in the electromagnetic force, leading ...
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2
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435
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Why are there no particles that ONLY interact via the strong force?
The title speaks for itself really: I noted everywhere I learned about fundamental interactions that there are particles that interact ONLY via the Weak Force (and gravity, if it counts)(e.g. ...
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1
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A very basic question about particle (leptons, hadrons) interactions
Suppose a particle reaction $A+B\to C+D$ is allowed in nature. Then, the reactions,
\begin{align}
A&\to \bar{B}+C+D,\\ \bar{C}+\bar{D}&\to \bar{A}+\bar{B},\\ B&\to\bar{A}+C+D,\\& \...
- 11.8k
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EM force or Strong force?
$$
e^- + p \rightarrow \Delta^{++} + e^- + \pi^-
$$
Apparently this reaction is mediated by the EM force. My question is: how do you know it isn't the strong force?
Yes, all the particles have ...
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What causes the difference in ranges of forces?
What causes the difference in ranges of forces? In other words, why is it that the weak force acts only at small distances whereas the Coulomb force has a very large range?
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How scientists know which particle is/is not influenced by strong force?
Muon is said to be uninfluenced by strong force, unlike pion.
My question is, based on which experiment, scientists determine a particle is influenced by strong force or not?
Edited:
Thank you for the ...
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247
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Are gluon particles analogous to flux tubes?
I've always been told gluons are the force "particles" mediating the strong force. And I've learned that Fluxtubes are what hold quarks together. Are these fluxtubes the "particle" ...
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How do mesons explain nuclear stability?
I understand that nuclear stability is explained by the presence of the residual nuclear force, which in turn is a result of the strong nuclear force, which I believe, is mediated between quarks via ...
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1
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301
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On $\Delta^{+}$ particle decay
Using isospin notation
$$
\Delta^+=\left|\frac 3 2,\frac 1 2\right\rangle=\frac{1}{\!\sqrt{3}}\bigg(|duu\rangle+|udu\rangle+|uud\rangle\!\bigg)
$$
It is known all of the $\Delta$ baryons with mass ...
- 1,644
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Does the energy of the strong force have mass? [closed]
The mass of a proton is said to predominantly be "comprised" of the mass of the strong force interactions within the proton. Logically, one could conclude that the energy (the strong force ...
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Strength of strong force and electromagnetic force
In this link, it is claimed that the strength of the strong force w.r.t. the E&M force is about 137 times larger. Does this have anything to do with the fine structure constant?
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If isospin is conserved in a given strong interaction, can we say that the interaction is certainly allowed?
If isospin is conserved in a given strong interaction, can we say that it is certainly allowed and it's not needed to check other conservation rules like baryon number, electric charge etc. ?
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Cause of Strong force
What is the origin and cause of the strong interaction which occurs between the nucleons? I have read that it is caused by the exchange of mesons but what then ultimately causes this meson exchange to ...
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3
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Do all hadrons experience the strong nuclear force?
In nuclear physics, nuclear force, also known as the residual strong force, is mediated by pions exchanged between protons and neutrons. It doesn't seem like this should be limited to protons and ...
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Can we say that binding energy is the work done by the strong nuclear force?
I know that the strong nuclear force is the force that holds the nucleus together by overcoming electromagnetic repulsion between protons. Binding energy is the minimum energy that is required to ...
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3
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How do the strong and weak forces relate to nuclear fission and fusion?
Fission and fusion are due to the strong and weak forces, but it is unclear to me which is responsible for which.
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Does Temperature Affect electromagnetic/Strong/Weak Force?
From what I understand, the energy or temperature of a structure with mass has no effect on the gravitational force it emits. Is the same true for the other fundamental forces?
What would happen to ...
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50
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How do virtual particles cause an attraction? [duplicate]
How do virtual particles such as photons cause a force between particles such as an attraction between protons and electrons?
4
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361
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Does the nuclear interaction favour aligned or anti-aligned spins?
My particle physics lecture notes seem to have contradictory statements.
Firstly they argue that p-n is stable while p-p and n-n are not because the nuclear interaction favours spin alignment (and by ...
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Does pionium decay in massless QCD?
The bound state of ${\pi}^+ {\pi}^-$ is called Pionium.
Is Pionium an Electromagnetic bound state or a Strong Force one? then Why?
Does such a bound state last forever if one works in QCD with ...
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How does the strong force increase in attraction as particles move farther away?
I have heard that the strong force can be imagined similar to a rubber band, where the farther you extend the ends, the harder they pull themselves back together. My question is how? From what it ...
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Like quark baryons
Why aren't there particles like neutrons or protons but with 3 up or 3 down quarks, instead of 2 up/1 down or 2 down/1 up. Does there have to be 2 different types of quarks for the strong force to ...
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Strong and Weak Interactions [closed]
How do I determine whether an interactions is strong or weak if what i've been given is just the particles and the type of reaction:
Determine whether the following are strong or weak interactions?
a ...
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772
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If the Strong Nuclear Force is $6×10^{39}$times stronger than gravity, how is a black hole able to tear nuclei apart?
Furthermore, would a black hole be able to tear apart a quark pair? Would there be a difference in tidal forces on a scale that small?
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Is isospin magnitude $I$ conserved? [duplicate]
Here is a table of isospin conservation in certain reactions.
It is often loosely stated that 'isospin is always conserved in strong interactions', but it is never clear whether they mean total ...
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244
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How to prove the equivalence of two definitions of hypercharge?
Before introducing top bottom and charm quarks,Strong Hypercharge is defined in the following two ways---
$1.\,\,\,Y=B+S$ where $Y,B,S$ are the hypercharge, baryon number and strangeness respectively.
...
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289
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What happens when one separates a quark-antiquark pair?
in particular, if the distance is more than about 1 fm?
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How can I build up my knowledge in particle physics to the level that I can calculate the path of elementary particles in a perfect vacuum?
I have to write a research paper (don't know the exact english translation) for school. The question I want the paper to answer/discuss is: 'Can the universe be predicted at sub-atomic level?'
The ...
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What is it about the mechanism for the strong force which creates a force?
So as I understand it, the mechanism for the strong force is that quarks emit/exchange gluons. Similarly, quark-anti-quark pairs are what pass between nucleons in an atom causing them to stick to each ...
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401
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How is strong coupling constant related to cross section?
I've been looking through different Pdfs /articles on strong coupling constant and nearly all of them involve cross section, I've understood what cross section is but not how is it connected to ...
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How is strong coupling constant measured through deep inellastic scattering (DIS)?
is deep inelastic scattering a process? and how is it (DIS) used to measure strong coupling constant?
the traditional method of measuring $α_S$ in deep inelastic scattering is from the strength of ...
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2
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The charge of an electron is a constant. In any case? [closed]
Since Millikan it is obvious that the charge of the electron can be measured as a result of the force exerted by an external electric field. What we get in detail is the charge from the excess of ...
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Are Feynman diagrams equivalent when gluons are emitted from different quarks?
3rd year physics undergrad here. I am new to particle physics.
We were asked to give the lowest order Feynman diagram of this reaction.
$$K_1^+(1400) \to K^+ \pi^+\pi^- $$
Now I came up with not ...
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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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696
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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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855
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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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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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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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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 ...
- 1,507
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412
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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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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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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 ...
user63248
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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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358
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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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