IGS Ph Particle Categories

What classification of particles do both baryons and mesons belong to?

• Hadrons

• Leptons

Hadrons are ...

• fundamental (ie contain no sub-particles)

• made of quarks &/or antiquarks

Which of the following are hadrons?

• electrons

• leptons

• mesons

• baryons

• quarks

Mesons ...

• are fundamental (do not contain any sub-particles)

• consist of 3 quarks

• consist of a quark-antiquark pair

Leptons ...

• are fundamental (ie do not consist of sub-particles)

• consist of a quark-antiquark pair

• consist of 3 quarks

Which of these are leptons?

• electrons

• protons

• neutrons

• neutrinos

• pi-mesons

Electrons, muons and taons are all negatively charged leptons.

What is the difference between them?

• Electrons are less massive than muons and taons.

• Taons are less massive than electrons and muons.

• Electrons have less negative charge than muons and taons.

• Taons have less negative charge than electrons and muons.

What is the relative charge on an electron neutrino, ν_e?

• -1 (like an electron)

• 0 (like a neutron)

• +1 (like a proton)

Which has more mass an electron or an electron neutrino?

• electron

• electron neutrino

What particle is represented by this symbol?

μ⁺

• Anti-muon

• Anti-muon neutrino

• Anti-pi meson

• Anti-K meson