Definition

1. Noun:
   • A principle in physics: "Conservation of parity" is a fundamental principle stating that the parity (a property related to spatial symmetry) of a system remains unchanged during an interaction, provided the laws of physics are identical in a right-handed and a left-handed coordinate system. It implies that a mirror image of a physical process is equally valid and probable.

Usage

• Scientific Context: This term is used almost exclusively in theoretical and particle physics to discuss symmetry laws and their violations.
  • The experiment provided evidence against the conservation of parity in weak nuclear interactions.
  • Physicists once believed conservation of parity was a universal law.

Advanced Usage

• "Parity violation": The phenomenon where the conservation of parity is not observed.
  • The discovery of parity violation was a major breakthrough in physics.

Variants and Related Words

• Parity (n): The property (being even or odd) of a wave function that determines its behavior under spatial inversion (mirror reflection).
  • The concept of parity is central to understanding quantum states.
• CPT symmetry / CP violation: Related but more comprehensive symmetry principles in physics that involve charge (C), parity (P), and time (T) reversal.
  • Studies of CP violation help explain the matter-antimatter asymmetry in the universe.

Synonyms

• Parity symmetry: Often used interchangeably with "conservation of parity."
• P-invariance: Another technical term for the invariance under a parity transformation, implying its conservation.

Related Phrases / Idioms

• "To conserve parity": The verbal phrase describing the action implied by the noun.
  • The strong nuclear force is known to conserve parity.

Noun

1. (physics) parity is conserved in a universe in which the laws of physics are the same in a right-handed system of coordinates as in a left-handed system