All Questions
Tagged with strong-force particle-physics
87
questions
73
votes
8
answers
71k
views
Is there an equation for the strong nuclear force?
The equation describing the force due to gravity is $$F = G \frac{m_1 m_2}{r^2}.$$ Similarly the force due to the electrostatic force is $$F = k \frac{q_1 q_2}{r^2}.$$
Is there a similar equation ...
- 859
15
votes
2
answers
3k
views
How can K (kaon) and Σ (sigma particle) be created quickly via the strong interaction and decay slowly via the weak interaction?
So the kaon particle (K) and the sigma particle (Σ) are created very quickly through the strong interaction and decay slowly through the weak interaction.
How is this so? Is this not some kind of ...
- 4,607
14
votes
4
answers
2k
views
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 ...
- 451
13
votes
2
answers
1k
views
Why can the Euler beta function be interpreted as a scattering amplitude?
The Wikipedia article on the Veneziano Amplitude claims that the Euler beta function can be interpretted as a scattering amplitude. Why is this?
In another word, when the Euler beta function is ...
- 1,139
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
9
votes
3
answers
5k
views
Is there strong interaction between electrons?
I am not familiar with quantum mechanics at all. But I remember when I was at high school, we learned that strong interaction keeps protons next to each other while they repel each other because of ...
- 3,191
8
votes
1
answer
2k
views
Why does the quarks binding energy add mass to nucleons instead of reducing it? [duplicate]
The mass of nucleons is bigger than the sum of the masses of its constituent quarks. I understand that it's because you have to take into account the binding energy of these quarks.
What I don't ...
- 4,827
5
votes
2
answers
3k
views
Why do the quarks constantly change colors?
In a hadron the quarks constantly change colors.They,then exchange gluons to remain color neutral.For example a red quark becomes blue by emitting a red and anti blue gluon and then the blue quark ...
- 129
5
votes
3
answers
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
5
votes
2
answers
324
views
Why and how does the term $\frac{\theta}{32\pi^2}F_{\mu\nu a}\tilde{F}^{\mu\nu a}$ induce electric dipole moment of the neutron?
It is well-known that the operator $$\delta \mathcal{L}_{QCD}=\frac{\theta}{32\pi^2}F_{\mu\nu a}\tilde{F}^{\mu\nu a}$$ violates CP, it can contribute to the neutron electric dipole moment, $d_n$. For ...
- 26.8k
4
votes
2
answers
13k
views
Difference between weak and strong interactions?
This was a statement given in my class:
"Strangeness is conserved in the strong and electromagnetic interactions, but not in a weak interaction "
But could someone please tell me how we ...
- 2,137
4
votes
1
answer
361
views
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 ...
- 2,604
4
votes
1
answer
1k
views
Strangeness of elementary particles
What is the property, whose violation led to the assumption of strangeness? Prior to the discovery of strangeness was it assumed that particles that are produced by strong interactions can decay only ...
- 81
4
votes
2
answers
823
views
Pion-Meson production during nuclear force
I was learning about quantum chromodynamics and how the force that holds particles in the nucleus works. I learned a pion-meson is created during gluon interaction within the particle and that meson ...
- 443
3
votes
2
answers
5k
views
Do hadrons only interact via strong interaction?
According to my revision guide baryon and mesons always interact via the strong interaction.
Does this hold for baryon-baryon interactions? meson-meson?
Thanks
- 1,241