411 REFERENCE · Wikibooks
A-level Physics (Advancing Physics)/Bosons/Worked Solutions
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1. A stationary light source emits single photons at regular intervals. Draw a Feynman diagram to represent this.
File:Feynman_diagram_monochromatic_light_source.svg
2. Write two equations (including a W+ boson) which describe positron emission.
3. What is the charge on a W- boson?
-1.6 x 10−19C, since it has to balance the charge on a proton.