All Questions
7
questions
1
vote
1
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332
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How Does QCD Explain Nuclear Fission?
This question is brief and simple. As a layman, it is my understanding that QCD (Quantum Chromodynamics) explains the nuclear force as a "residual" force, mediated by pions (mesons), which ...
- 11
-2
votes
2
answers
225
views
In the history of the development of the standard model was there a version in which quark-antiquark pairs or flux tubes were the fundamental particle [closed]
Based on the observations of color confinement and no free quarks, I'm wondering if instead of a having quarks as fundamental particles, during development of the Standard Model was there ever a ...
- 518
-3
votes
2
answers
308
views
Why is a quarkonium any different from a meson?
Quarkonium states are bound states of a quark-antiquark pair but so do the mesons. What is the difference between a quarkonium (e.g., charmonium, and bottomonium) and a meson then? Why use a separate ...
- 11.8k
3
votes
1
answer
102
views
Which mesons are possible?
That's probably a plain question but I wonder: Which mesons can exist? The only limitation I'm aware of is the charge (antiparticle+particle). Ok, finally also the color (anticolor+color) but I assume ...
- 1,507
2
votes
1
answer
193
views
Why do we need the strong interaction if we have Yukawa's meson theory?
How is Yukawa's theory of mesons different from the standard model's strong interaction? I mean if Yukawa's theory is complete then why do we need quarks and gluons?
- 21
1
vote
0
answers
65
views
How to calculate D0->K+K- decay with QCD factorization?
I am studying the decay of D0->K+K- and I calculated the result of Branching Ratio by Naive QCD and I wrote all the equations for amplitude and branching Ration and Hamiltonian and... for this decay ...
6
votes
1
answer
385
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String breaking in QCD
I have trouble understanding string breaking in QCD. I have read an article on arxiv (http://arxiv.org/abs/hep-lat/0505012), and I still don't understand what truly happens.
My understanding of ...
- 61