This post is a collection of quotes from Eugene Khutoryansky's quantum chromodynamics video on YouTube. I recommend that everyone should watch this video and check out Eugene's channel. There are 13 quotes divided into 6 sections.
Click here to watch the video
Click here to view Eugene's channel
1. Strong nuclear force
2. Quarks and color
3. Gluons and color
4. Color conservation
5. Gluons turning into quarks (and in reverse)
6. Pulling apart quarks
1. Strong nuclear force
"The strong nuclear force is the result of the fact that particles with a color charge exchange gluons with one another."
"Protons and neutrons have the ability to emit a virtual composite particle consisting of one quark and one anti-quark, which can then be absorbed by another proton or neutron... [This] creates the force binding protons and neutrons inside the nucleus of an atom."
"However, these composite particles consisting of one 'quark' and one 'anti-quark' can not exist for very long, which is why the force binding protons to neutrons works only over a very short distance."
2. Quarks and color
"The color charge of each quark can take three possible values. Let us invent labels for these three values and call them 'green', 'red' and 'blue'."
"The color charge of an anti-quark can also take three possible values, which we will call 'anti-blue', 'anti-red' and 'anti-green'."
3. Gluons and color
"Besides quarks and anti-quarks, the only other type of particles that contain this so called 'color' charge are particles called gluons."
"...each gluon possesses two color charges: one color and one anti-color of a different type..."
4. Color conservation
"A color is cancelled out by its associated anti-color, and the total amount of 'color' charge is always conserved..."
"All composite particles, such as protons and neutrons, are what we call 'color neutral'. This means that if we count the colors of all the quarks and gluons inside, we will always find the amounts of red, green and blue to be exactly equal to one another."
5. Gluons turning into quarks (and in reverse)
"A gluon can split up into a quark and its associated 'anti-quark'... These events can also happen in reverse, with a quark and its associated anti-quark annihilating each other to produce a gluon."
"Therefore, neutrons and protons don't just each have three quarks, since many virtual 'quarks' and 'anti-quarks are constantly being created and annihilated inside both neutrons and protons."
6. Pulling apart quarks
"If we try to separate quarks by applying a large amount of energy, then this energy will be converted into the creation of a new 'quark' and an 'anti-quark'."
"Each quark and each anti-quark we create will still be bound to another quark or to another anti-quark, and we will not observe individual quarks in isolation."
