All Questions
Tagged with strong-force particle-physics
87
questions
2
votes
1
answer
289
views
What happens when one separates a quark-antiquark pair?
in particular, if the distance is more than about 1 fm?
0
votes
0
answers
33
views
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 ...
- 1
1
vote
0
answers
92
views
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 ...
- 19
0
votes
2
answers
401
views
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 ...
- 141
0
votes
0
answers
68
views
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 ...
- 141
-4
votes
2
answers
905
views
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 ...
- 10.6k
2
votes
0
answers
121
views
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 ...
10
votes
2
answers
3k
views
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 ...
- 485
2
votes
1
answer
696
views
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 ...
1
vote
1
answer
855
views
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 (...
- 471
3
votes
1
answer
320
views
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 ...
- 481
0
votes
3
answers
192
views
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 $...
- 23
1
vote
1
answer
1k
views
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.
- 1,507
1
vote
1
answer
69
views
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
0
votes
0
answers
412
views
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)?...
- 975