All Questions
Tagged with quantum-chromodynamics protons
27
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3
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2
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130
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Can an electron be produced inside a proton?
We know that inside a proton there is a sea of quarks, antiquarks and gluons. This happens as the valence quarks emit gluons which then split into a quark-antiquark pairs. These pairs become gluons ...
- 85
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Quantum Chromodynamics (QCD) Prediction of Proton Mass
I’m trying to understand the prediction of the proton mass according to Quantum Chromodynamics (QCD). I know that the proton is composed of quarks and gluons, and that the mass of the proton is not ...
1
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0
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137
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Has the mass of a proton been calculated from current quarks, through the renormalization process?
That's basically my question. Has the mass of the proton been calculated using QCD and the interactions between the current quarks? Perturbative methods obviously can't be used as they deal with ...
- 450
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How exactly does a proton form from quarks? What is the exact sequence and mechanism?
What are the steps that lead to the bonding of two up quarks and one down quark into a proton? For instance, does an up quark "bind" with a down quark in quark-gluon plasma, which then binds ...
- 29
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The proton quantum state
In my understanding of QM I expect the quantum state of the proton $| p^+ \rangle$, say in the rest frame, to be an eigenstate of the QCD Hamiltonian $H_{\text{QCD}}$, which describes the dynamics of ...
- 1,129
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Does the scattering data, in any way, justify the simplistic picture of hadrons? [duplicate]
The structure of the neutron or the proton is extremely complicated. It is not a simple bound state of three valence quarks. However, the simplified picture allows us to explain various properties of ...
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1
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Energy stored in the gluon fields -- in a proton, versus, in a pure Yang-Mills mass gap
I was reading this How much of the proton's mass is due to the Higgs field? and finds the discussion says:
As Prof. Strassler explains in the link above, the proton mass is best throught of as ...
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1
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Do magnesium-32 nuclei look like soccer balls?
My understanding is that the strong interaction between nucleons, while very strong, is much weaker than the strong interaction between quarks within a nucleon. So even though an atomic nucleus in an ...
- 48.4k
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Does a free proton shrink when accelerated?
Reading about the charge radius of the proton and proton radius puzzle I started wondering if the cross section and therefore also the charge radius (i.e. size of proton) changes or more specifically ...
- 4,170
5
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What percentage of a Proton's mass is potential/kinetic energy?
So in an hydrogen atom, the total mass of the atom is equal to the masses of the proton, the electron, minus their net binding energy of around 13 eV. Making the total less massive than the sum of its ...
3
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1
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Number of gluons inside a proton/neutron
In the model of constituent quarks, of course very different of the picture of QFT about what a QCD proton/neutron is, protons are made of 3 quarks. However, how many gluons are inside a proton? After ...
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Is there any meaningful notion of a probability distribution for the number of quark-antiquark pairs in a hadron?
A hadron (such a proton) can be thought of as being composed of a large (but fluctuating) number of quark-antiquark pairs. As far as I understand it, the situation (say for a proton, for definiteness) ...
- 48.4k
0
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Are the arrangements of quarks in hadron ground-state wavefunctions rotationally symmetric?
The Hamiltonian of quantum chromodynamics (like the rest of the Standard Model) is rotationally symmetric. My question is whether these space symmetries are spontaneously broken in the ground state of ...
- 48.4k
3
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How can I visualize the oxygen nuclear charge density?
Oxygen has 8 protons and 8 neutrons.
Based on the nuclear shell model, protons should pair with anti-parallel protons to create singlet spin states,
and neutrons should similarly pair with anti-...
- 1,016
10
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How much of the proton's mass is due to the Higgs field?
The proton mass is 938 MeV. People often claim that
(A) The proton is a bound state of two up quarks and one down quark, with the three quarks contributing a total rest mass of $2 \times (2.2 \text{...
- 48.4k