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Physics, Astronomy & Cosmology / What happens with quarks in nuclei? Do they help with binding?
« on: 28/06/2020 09:19:17 »
Nucleons being built of 3 quarks is a seen as a common knowledge.
So what happens with quarks when multiple nucleons bind into a nucleus?
This seems kind of a basic question, also about charge distribution in nuclei, but it is really tough to find any reliable materials about it - any thoughts?
Some more detailed questions:
- To model e.g. dueteron + neutron/proton scatterings, there are fitted ~40 parameters nucleon-focused models which require 3-body forces ( https://en.wikipedia.org/wiki/Three-body_force ), neglecting quarks - would we still need 3-body forces if including quarks into considerations?
- We know deuteron has large quadrupole moment ( https://en.wikipedia.org/wiki/Deuterium#Magnetic_and_electric_multipoles ), what naively requires multiple charges - why quarks are not considered here?
- Or: what is charge distribution of neutron ("built of 3 quarks")? I have seen some papers claiming positive charge and negative shell, e.g. http://www.actaphys.uj.edu.pl/fulltext?series=Reg&vol=30&page=119
So what happens with quarks when multiple nucleons bind into a nucleus?
This seems kind of a basic question, also about charge distribution in nuclei, but it is really tough to find any reliable materials about it - any thoughts?
Some more detailed questions:
- To model e.g. dueteron + neutron/proton scatterings, there are fitted ~40 parameters nucleon-focused models which require 3-body forces ( https://en.wikipedia.org/wiki/Three-body_force ), neglecting quarks - would we still need 3-body forces if including quarks into considerations?
- We know deuteron has large quadrupole moment ( https://en.wikipedia.org/wiki/Deuterium#Magnetic_and_electric_multipoles ), what naively requires multiple charges - why quarks are not considered here?
- Or: what is charge distribution of neutron ("built of 3 quarks")? I have seen some papers claiming positive charge and negative shell, e.g. http://www.actaphys.uj.edu.pl/fulltext?series=Reg&vol=30&page=119