Feynman diagrams

Fans of particle physics often encounter a series of doodles called Feynman diagrams. These mystifying scribbles were invented by Richard Feynman and they encode information on how particle physics collisions unfold. But they have an even deeper significance. In this video, Fermilab’s Dr. Don Lincoln gives you a peek into the deeper meaning of these important scientific pictograms.

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[YouTubist]

This is one of the best explanations of Feynman diagrams I've seen on YouTube. Thank you for the clear explanation.👍

[Bricklemore]

The intro gave me a 1998-2004 flashback. I yearn to return.

[GiacomodellaSvezia]

At school, I was probably worst in math and physics, but at the same time very aware of their importance, and scientific discoveries in these fields will always have my special attention. I may have my own strengths, but I will always feel a bit of envy for those who are at ease with this kind of stuff and a bit sad for having absolutely no talent for it myself. I am thankful to people like Richard Feynman and Don Lincoln for explaining this in layman's language as best they can.

[capdelaxavineta]

"Nature uses only the longest threads to weave her patterns, so each small piece of her fabric reveals the organization of the entire tapestry."
Richard P. Feynman

[chriss.]

since it is a very lengthy calculation for 1 Feynman diagram, M.J.G.V. developed Schoonschip, this was one of the first computer algebra systems, developed in 1963 by Martinus J. G. Veltman, for use in particle physics.
"Schoonschip" refers to the Dutch expression "schoon schip maken": to make a clean sweep, to clean/clear things up (literally: to make the ship clean). The name was chosen "among others to annoy everybody, who could not speak Dutch". (from wikipedia)
during graduate studies I practised with Schoonschip .

[professordanfurmanek]

Feynman himself would be proud of you doc Lincoln! Best explanation I've ever seen!

[scrtpassword]

I think they should have shown the other kinds of exchange forces (spring shape = gluons), that would have really drive home the point of how amazing these diagrams can be. But still a good video!

[qbtc]

Ernst Stueckelberg came up with similar diagrams independently of and before Feynman. He also contributed to other areas of physics for which other physicists won Nobel prizes. Along with WIllard Gibbs, Ernst Stueckelberg is probably the greatest scientist you never heard of.

[brockvervilles]

Dr. Lincoln! Love part 1! Could you give us a part 2?! Specifically, breaking down the electron variables I and O?

[lucishan]

Finally! Im up to these diagrams! What a great sunday im having so far! Thank you doctor and channel team

[GranPaMark]

Dr Don - Your presentations work great for me - and a little humor is always good. This is heavy stuff.

[DavidODuvall]

Thank you for answering a question that I wondered about for years!

[ShenLong]

This videos are really underrated. This channel should get even more views. That makes me angry.

[zubmit]

I love it when the equation becomes intense ;)

[Aryan-jqbt]

8 years passed, still one of the best explanations

[benheideveld]

Outstanding video. Short, Sweet, Super Smart! Oh BTW the book on this is Diagrammar by Veltman and ‘t Hooft, the 1999 joint Dutch Nobel laureates for the renormalization of Yang-Mills Fields, and hence the unification of electromagnetism and the weak interaction, hence the term electro-weak interaction. Schoonschip!

[MatthewLong]

Wow! Thanks Dr. Don! great episode, informative and concise. I would like a little more of a hint to solve the equation but I have Feynman's QED book so I'll revisit that.

[northernskies]

Thank u so much Don! I finally understand Feynman diagrams because of you.

[robertschlesinger]

Great overview video on Feynman Diagrams suitable for beginning physics students.

[ssc]

It is important to make the point that the leading contribution is enough only in the absence of strong electromagnetic fields....