(2) Quarks and Leptons

Question 1

General Structure:
Meson:
Baryon:

Answer 1

Meson: Quark + antiquark pair
Baryons: 3 Quarks

Question 2

Quark Structure of a pion π+

Answer 2

U
(anti)D

Question 3

B- Decay Feynman Diagram:

Answer 3

n–> p + e- + (Anti)Ve

Going in: Neutron
Squiggly line: W-
Going out: Electron + antineutrino

Question 4

B+ Decay Feynman Diagram:

Answer 4

p–>n + e- + Ve

Going in: Proton
Squiggly line: W+
Going out: Electron + Neutrino

Question 5

Electron Capture Feynman Diagram

Answer 5

p + e- –> n + Ve
Going in: Proton + electron
Squiggly line: W+
Going out: Neutron + neutrino