Quarks and Leptons

What is a Quark?

The building blocks of Hadrons.

What is a Baryon?

Consists of 3 Quarks/Anti-Quarks. Indirectly/Directly decays into a proton

What are the quantities that must be conserved?

Charge number, Baryon Number, Lepton Number, Strangeness and Energy.

What is a Lepton?

A particle that only interacts through the weak interaction. (They are not made up of anything except themselves, so contain no quarks).

What is a Hadron?

A particle made that only interacts with the strong force interaction.

What are the two Hadron groups?

Baryons and Mesons

What is a muon?

A heavy electron. Same charge as an electron with a much greater rest mass of 200x the size of an electron.

What is a neutrino?

An incredibly light, chargeless particle released in Beta and Muon decay

What speed do Neutrinos travel at?

Almost the speed of light

What is a Pion

A meson consisting of protons and neutrons

What is a meson?

A hadron consisting of 3 quarks and antiquarks that do not decay into protons.

What is Strangeness?

Explains why certain particles behavior that does not obey conservations laws.

In which nuclear interaction is strangeness conserved?

Strong nuclear force.

In weak force interactions how much can strangeness be altered by?

-1, 0 +1