English Explanatory Dictionary

penguin diagram

English dictionary entry

Meanings

noun
  1. A type of unicyclic Feynman diagram in which a quark temporarily changes flavor and engages in an interaction.

Word forms

penguin diagram penguin diagrams

Etymology

Coined by John Ellis in 1977, based on the shape of the diagram and inspired by a bet made with Melissa Franklin to put the word "penguin" in his next paper.

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