All Questions
Tagged with strong-force particle-physics
87
questions
1
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244
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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}...
- 1,215
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1
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475
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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 ...
- 4,509
0
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0
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164
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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
2
votes
1
answer
248
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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 ...
- 1,094
2
votes
2
answers
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?
- 4,235
1
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1
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232
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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 ...
- 2,648
0
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0
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188
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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 ...
- 198
1
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2
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164
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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 ...
user215054
2
votes
1
answer
174
views
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 ...
- 31
3
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1
answer
1k
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How does the exchange of pions result in the strong force?
I understand that the residual strong force is a result of an exchange of pions. But I fail to understand how this exchange results in a force that holds nuclei together! May this query please be ...
3
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2
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2k
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Isospin conservation for total isospin or third component of isospin?
In a strong interaction, is the total isospin or just its third component conserved? Or are they both conserved?
- 31
5
votes
3
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2k
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Why does the weak nuclear interaction have a shorter range than strong nuclear interaction?
My textbook says:
"Weak nuclear interaction acts on protons, neutrons, electrons and neutrinos in order to bring about beta decay. It has very short range (10-18m)"
"Strong nuclear interaction ...
- 797
2
votes
2
answers
769
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Half-life of $W$ and $Z$ bosons
$W$ and $Z$ bosons should decay through weak interaction. But their half-life is around $\tau = 10^{-25} s$ which is a typical value for particles decaying through strong force (instead of a $10^{-12}-...
- 479
2
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1
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148
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What happens if a neutron flies towards a nucleus?
Rutherford experiment shows that alpha-particles when they fly towards metal foil sometimes (in minority of cases) can bounce. An explanation proposed was that atoms in fact have positively charged ...
user168013
1
vote
1
answer
62
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What is meant with an $X$ in the particle data booklet?
What is meant with the $X$ in some decay channel of the $B^0$ ?
B⁰ PDG Booklet
I imagine it could be an unidentified resonance, but I cannot find a definition. What especially confuses me is that ...
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