Linked Questions

1 vote
1 answer
2k views

What is the motion of quarks inside nucleons? [duplicate]

Nucleons consist of quarks which are charged particles. Proton has the quark content of uud and neutron of udd. So, it may be visualized that the down quark always remain between the up quarks inside ...
Subhra's user avatar
  • 467
1 vote
0 answers
150 views

What is the shape of the quark structure in a proton or neutron? [duplicate]

I know the pictures we see are just a representation to help people understand what is going on while in reality the quark is likely a wave vs a particle. That being said it is always depicted as a ...
Joe's user avatar
  • 1,348
0 votes
0 answers
92 views

The Internal Structure of A Nucleon [duplicate]

Just like, in a Bohr model, the atom has a particular structure, what is it like inside of a nucleon? Like, are there particular ways the quarks are arranged, and what about the binding energy that ...
Damon Blevins's user avatar
0 votes
0 answers
78 views

Does core of a proton exist? [duplicate]

I understand a proton is made up of quarks/gluons. I want to know if a proton has an actual core? Also whether protons have a core/surface temperature.
Mark Emery's user avatar
44 votes
8 answers
13k views

Why doesn't an electron ever hit (and stick on) a proton? [duplicate]

Imagine there is a proton confined in a box and we put an electron at 10 cm distance: It gets an acceleration of thousands of meters/second^2 along a straight line joining the two CM's. One would ...
user avatar
32 votes
6 answers
8k views

What is the experimental evidence that the nucleons are made up of three quarks?

What is the experimental evidence that the nucleons are made up of three quarks? What is the point of saying that nucleons are made of quarks when there are also gluons inside it?
Solidification's user avatar
19 votes
2 answers
3k views

Quarks in a hadron: where does the mass come from?

We know that the sum of the masses of the quarks in a proton is approximately $9.4^{+1.9}_{-1.3}~\text{MeV}/c^2$, whereas the mass of a proton is $\approx931~\text{MeV}/c^2$. This extra mass is ...
Tamoghna Chowdhury's user avatar
14 votes
3 answers
3k views

Do protons have a shape?

They are often assumed to be balls and spheres in high school textbooks and exams and I had never questioned this until somebody complained to me that modern physicists are obsessed with balls. Do ...
Hisham's user avatar
  • 1,821
13 votes
2 answers
2k views

In which experiment did protons seem to consist of infinite amount of quarks?

In this video Richard Feynman is telling that in some experiment it seems that the proton should consist of infinite amount of quarks. What is this case he's mentioning? Is it solved now?
Džuris's user avatar
  • 3,227
5 votes
1 answer
4k views

Why are there 3 quarks in a proton? [closed]

A few quark related questions (I don't know much about them other than that there are 2 flavors concerning protons and neutrons). Why are there 3 quarks in a proton or neutron? Why not 2 or 4? Is ...
Jonathan.'s user avatar
  • 6,927
1 vote
2 answers
2k views

Are protons and neutrons 2 dimensional given that they consist of 3 quarks?

Assuming the following: Neutrons and protons are made of 3 quarks (of different types). All quarks are point particles Then a neutron or proton cannot be 3 dimensional because three points cannot ...
Jus12's user avatar
  • 3,423
5 votes
1 answer
1k views

What are the average matter, antimatter, and binding energy composition of protons and neutrons?

For a free baryon at rest at room temperature, how much of its ~1Gev (rest) mass can (on average) be considered as matter, as antimatter, and as binding energy? For a baryon in a nucleus, I assume ...
sigoldberg1's user avatar
  • 4,497
4 votes
2 answers
687 views

How the nucleon structure has been identified experimentally?

It is known that nucleons (proton, neutron) are composed of partons (quarks, etc.). How was this identified experimentally? In particular, how it has been identified that nucleons comprise of more ...
Murod Abdukhakimov's user avatar
3 votes
1 answer
4k views

Quark Radius Upper Bound

If quarks had internal structure (contradicting current beliefs), what is the lowest upper bound on their "radius" based on current experimental results? If possible, I'd prefer to only consider ...
bobuhito's user avatar
  • 1,016
4 votes
2 answers
1k views

Is nuclear force always attractive?

I read in my high school physics's textbook that nuclear force holds the nucleus. Is the nuclear force another name for the strong force? If it holds the nucleus it should be attractive. Am I right?
mathLover's user avatar
  • 366

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