Definition

1. Noun:
   • A subatomic particle: The lambda hyperon is a specific type of baryon (a heavy subatomic particle) that is electrically neutral and has specific quantum properties, including an isotopic spin of 1.

Usage

• The term "lambda hyperon" is used exclusively in the field of particle physics. It refers to a specific, well-defined particle. It is a technical, scientific term and is not used in everyday language.
• It is often represented by the Greek letter uppercase Lambda (Λ) or lowercase lambda (λ) in equations and particle decay diagrams.
• Example: "The lambda hyperon was discovered in cloud chamber experiments from cosmic rays."
• Example: "The decay properties of the lambda hyperon provide key tests for theories of the strong nuclear force."

Advanced Usage

• In particle physics notation, the lambda hyperon is often denoted simply as the Λ particle or Λ⁰ (where the superscript '0' indicates its neutral electric charge).
• It is classified as a strange baryon because it contains a strange quark, which gives it the property of "strangeness."
• Its decay, primarily into a proton and a pion (Λ⁰ → p⁺ + π⁻), was historically important for establishing the concept of the weak nuclear force acting on quarks.

Variants and Related Words

• Λ particle / Λ⁰: The standard shorthand symbols for the lambda hyperon.
• Hyperon: The general class of baryons that contain at least one strange quark. The lambda hyperon is a specific member of this family.
• Baryon: The broader class of heavy subatomic particles made of three quarks, which includes protons, neutrons, and hyperons.
• Sigma hyperon (Σ): A related type of hyperon with different charge and isotopic spin properties.

Synonyms

• Λ baryon
• Lambda particle
• Λ⁰

Note: There are no idioms or phrasal verbs associated with this highly specialized scientific term.

Noun

1. an electrically neutral baryon with isotopic spin 1