Tagged Questions
4
votes
1answer
76 views
Why is a pion so light compared to a neutron or proton?
A pion is made out of a pair of up and/or down quarks. A neutron or proton is three up or down quarks. So naively I'd expect a pion to be about 2/3 the mass of a nucleon.
In fact it's less than 1/6 ...
1
vote
1answer
92 views
A strange particle, $X$, decays in the following way: $X → π^– + p$. State what interaction is involved in this decay
A strange particle, $X$, decays in the following way: $X → π^– + p$. State what interaction is involved in this decay.
I know the answer to be weak interaction, but why is it weak interaction? What ...
0
votes
1answer
223 views
Why isn't Hydrogen's electron pulled into the nucleus? [duplicate]
Possible Duplicate:
Why do electrons occupy the space around nuclei, and not collide with them?
Why don’t electrons crash into the nuclei they “orbit”?
From what I learned in chemistry, ...
5
votes
2answers
325 views
If quarks didn't have mass, could protons (and neutrons) exist?
I read here (mass of a proton) that the mass of a proton is mostly (99%) due to the energy of the strong nuclear force which binds the quarks together, and not the actual mass of the quarks. My ...
2
votes
0answers
108 views
What forms are theoretically predicted for orbitals or quarks in hadrons and of hadrons in tritium?
We all know very illustrative spatial representations of predicted electron orbitals in atoms which are essentially spatial plots of the solutions of wave equations.
In all atoms the electrons occupy ...
