lambda particle
Học thuậtThân thiện
Definition
Noun: A type of subatomic particle classified as a baryon. It is electrically neutral (carries no electric charge) and has an isotopic spin (isospin) quantum number of 1.
Usage
The term "lambda particle" is used specifically in the field of particle physics to refer to this neutral baryon. It is often denoted by the Greek letter Λ (lambda) or Λ⁰ (lambda zero).
Examples
- In the study of quark composition, the lambda particle is a baryon containing up, down, and strange quarks.
- The discovery of the lambda particle was a significant milestone in understanding strange matter.
- The decay properties of the lambda particle are important for certain high-energy physics experiments.
Advanced Usage
- "Lambda hyperon": This is a synonym often used interchangeably with "lambda particle," emphasizing its classification as a hyperon (a baryon containing at least one strange quark).
- The symbol Λ⁰ is used to specify the neutral lambda particle, distinguishing it from other related particles like the charged sigma (Σ) particles.
Variants and Related Words
- Hyperon: A broader category of baryons that includes the lambda particle, as well as sigma, xi, and omega particles.
- Baryon: The general class of heavy subatomic particles, such as protons and neutrons, to which the lambda particle belongs.
- Strange quark: A fundamental quark constituent that gives the lambda particle its "strangeness" quantum number.
Synonyms
- Lambda hyperon
- Λ particle
- Λ⁰ baryon
Related Terms and Concepts
- Isospin (Isotopic Spin): A quantum number related to the strong nuclear force; the lambda particle has isospin 1.
- Strangeness: A quantum number conserved by the strong force; the lambda particle has a strangeness of -1.
- Quark Model: The theoretical framework describing baryons like the lambda particle as combinations of three quarks (specifically up, down, and strange quarks for the Λ⁰).
Noun
- an electrically neutral baryon with isotopic spin 1