Quarks and leptons

Question 1

Muon

Answer 1

A lepton which is negatively charged and has a greater rest mass than the electron

Question 2

Pion or ‘π meson’

Answer 2

A meson that consists of an up or down quark and an up or down antiquark

Question 3

Kaon or ‘K meson’

Answer 3

A meson that consists of a strange quark or antiquark and another quark or antiquark

Question 4

Mesons

Answer 4

A hadron consisting of a quark-antiquark pair

Question 5

Antimuon

Answer 5

Antiparticle of the muon

Question 6

Hadrons

Answer 6

Particles and antiparticles that can interact through the strong interaction. E.g. protons and neutrons

Question 7

Leptons

Answer 7

Particles that interact through the weak interaction and, if charged, through the electromagnetic interaction. E.g. electrons, muons and neutrinos

Question 8

Quarks

Answer 8

Hadrons consist of quarks (up, down and strange)

Question 9

Antiquarks

Answer 9

Antiparticle of a quark

Question 10

Strangeness number

Answer 10

A strangeness number is assigned to every particle and antiparticle on the basis that strangeness is always conserved in the strong interaction, but not in a weak interaction or a decay involving a strange quark or antiquark

Question 11

Antibaryon

Answer 11

A hadron consisting of three antiquarks

Question 12

Conservation rules

Answer 12

Conservation of energy, charge, baryon number and lepton number apply to all particle interactions

Question 13

Neutrino types

Answer 13

Electron neutrino and muon neutrino

Question 14

Strong interaction

Answer 14

Interaction between two hadrons

Question 15

Weak interaction

Answer 15

Interaction between two leptons