Feynman DiagramsFeynman...
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Handout Feynman Diagrams Feynman Diagrams Feynman Diagrams Feynman Diagrams Graphical way to describe the particle interactions interactions … Feynman Diagrams
Transcript of Feynman DiagramsFeynman...
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Feynman DiagramsFeynman DiagramsFeynman DiagramsFeynman DiagramsGraphical way to describe the particle interactionsinteractions …
Feynman Diagrams
Feynman Diagrams
Weak Interactions (Decays)Weak Interactions (Decays)
e−d
W−
νe_
u
Feynman Diagrams
τp = 887 s
Weak Interactions (Decays)Weak Interactions (Decays)µ−π− µ− νe
_
e−
W−µ−u_
W
W−
νeνµ
_
νµ_µ
d
Feynman Diagrams
τµ = 2.2 x 10−6 sτπ = 2.60 x 10−8 s
A neutral current (Z0 boson) reaction.
Z0Z0
νµνµ
Feynman Diagrams
PHYS 736 Question 1PHYS 736 Question 1How can we draw theFeynman diagram for
Answer : see a graphbelowy g
the deuteron (a boundstate of a proton and a
)?neutron)?
pt
p
π–
nπ+π0
n p
n p p n
Yukawa Picture
Feynman Diagrams
