Hugh David Politzer

Hugh David Politzer is an American theoretical physicist who shared the 2004 Nobel Prize in Physics for discovering asymptotic freedom in quantum chromodynamics.

David Gross: David Gross is an American theoretical physicist who shared the 2004 Nobel Prize in Physics for discovering asymptotic freedom. Gross independently derived asymptotic freedom with Frank Wilczek in 1973.
Asymptotic freedom: Asymptotic freedom is the weakening of the strong interaction as quarks approach one another or their energy increases. Politzer’s 1973 calculation established this defining behavior of the strong interaction.
1973: 1973 was the year asymptotic freedom was independently discovered in quantum chromodynamics. Politzer published his proof in this pivotal year.
Quantum electrodynamics: Quantum electrodynamics is the quantum field theory of electromagnetism and electrically charged particles. Unlike QCD at short distances, its electromagnetic coupling grows slightly with energy.
Frank Wilczek: Frank Wilczek is an American theoretical physicist who shared the 2004 Nobel Prize in Physics for discovering asymptotic freedom. Wilczek and Gross published the discovery independently of Politzer.
Quantum chromodynamics: Quantum chromodynamics is the quantum field theory of quarks and gluons and the strong interaction. Its mathematical structure produces the running coupling Politzer analyzed.
Strong interaction: The strong interaction is the fundamental force that binds quarks and holds atomic nuclei together. Explaining its unexpectedly weak short-distance behavior motivated the discovery.
Parton model: The parton model describes high-energy hadrons as collections of point-like constituents called partons. Asymptotic freedom explains why partons act nearly independently in high-energy collisions.
Nobel Prize in Physics: The Nobel Prize in Physics is an annual award recognizing major contributions to physics. The 2004 prize recognized Politzer, Gross, and Wilczek for asymptotic freedom.
Renormalization group: The renormalization group describes how physical parameters change with the scale at which a system is examined. Its equations show how the strong interaction’s effective strength varies with energy.

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