The quarks tag has no wiki summary.
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1answer
452 views
Neutral Pion Decay
While studying C-symmetry, a question about neutral pion decay came up.
The most probable channels in which neutral pion $\pi^0$ decays are:
$\pi^0\longrightarrow\gamma+\gamma$ (98%)
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11
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1answer
367 views
How to determine the mass of a quark?
As far as I know quarks are never found in isolation, so how can we determine their rest mass?
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3answers
876 views
What does it mean that the neutral pion is a mixture of quarks?
The quark composition of the neutral pion ($\pi^0$) is $\frac{u\bar{u} - d\bar{d}}{\sqrt{2}}$. What does this actually mean?
I think it's bizarre that a particle doesn't have a definite composition. ...
8
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1answer
356 views
Do color-neutral gluons exist?
If I'm correct a quark can change color by emitting a gluon. For example a blue up quark $u_b$ can change into a red up quark by emitting a gluon:
$$u_b \longrightarrow u_r + g_{b\overline{r}}$$
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8
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2answers
981 views
Is it pions or gluons that mediate the strong force between nucleons?
From my recent experience teaching high school students I've found that they are taught that the strong force between nucleons is mediated by virtual-pion exchange, whereas between quarks it's gluons. ...
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2answers
252 views
What happens if up quarks are replaced by down quarks and down quarks are replaced by up quarks?
I believe the quarks would flip the proton's internal charge, reverse the spin of the proton, transform into another flavor, and then become unconfined and free.
6
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1answer
456 views
What is the difference between 'running' and 'current' quark mass?
When looking at the PDG, there is a difference between the 'running' and the 'current' quark masses.
Does anyone know which is the difference between these two?
-1
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2answers
400 views
Where can I find the measured magnetic moments of the quarks?
I read that the magnetic moment of the proton can be expressed as the sum of the magnetic moments of the three quarks like $\mu_p = \frac{4}{3}\mu_u - \frac{1}{3}\mu_d$. But I couldn't find a table ...
3
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2answers
492 views
What Quark and Anti-quark are electrically neutral Pions made out of?
A positive pion is an up and an anti-down. A negative pion is a down and an anti-up. What's a pion with an electrical charge of 0?
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1answer
564 views
Quantum numbers of the helicity states of the W boson
What are the weak hypercharge and weak isospin quantum numbers of the helicity states of the $W^\pm$ and $Z^0$ bosons?
The W boson is a spin-1 massless particle. Consequently it has three helicity ...
4
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1answer
224 views
How to count quarks using Deep Inelastic Scattering?
The Wikipedia article on deep inelastic scattering suggests that the experiment shows baryons have three point of deflections (corresponding to three quarks) and mesons have two points of deflection.
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