charm quark
Noun: A charm quark is a type of elementary particle, specifically a flavor of quark. It is one of the six known types (or "flavors") of quarks in the Standard Model of particle physics. It is characterized by having an electric charge of +2/3, a "charm" quantum number of +1, and a mass significantly greater than lighter quarks like the up and down quarks.
The term "charm quark" is used exclusively in the context of particle physics to refer to this specific fundamental constituent of matter. * The charm quark was proposed theoretically in the 1970s to explain certain particle interactions. * A particle containing a charm quark and its antiquark is called charmonium. * The discovery of the J/ψ meson provided the first experimental evidence for the charm quark.
- Hadron Containment: Charm quarks are never found in isolation due to color confinement; they are always bound within composite particles called hadrons, such as mesons (e.g., D mesons) or baryons (e.g., charmed baryons like Λc⁺).
- Charm Quantum Number: The "charm" (+1) is a conserved quantum number in strong and electromagnetic interactions, meaning it is preserved in those processes. It can change only via the weak nuclear force.
- Charmed (adjective): Used to describe a particle that contains a charm quark, e.g., a .
- Charm (noun): In this specific physics context, "charm" refers to the flavor quantum number carried by the charm quark.
- Quark (noun): The general category of fundamental particles to which the charm quark belongs. Other flavors include up, down, strange, top, and bottom.
There are no true synonyms for this specific scientific term. The closest related terms are: * c-quark: The standard abbreviation used in particle physics equations and notations (where 'c' stands for charm).
There are no idioms or common phrasal verbs associated with this highly technical scientific term.
- a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1