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Conservation in particle reactions

  • Thread starter faen
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1. Homework Statement

State whether the following reactions or particle decays are allowed or not.

What conservation laws, invariance principles, or other mechanisms account for the forbidding of some processes?

Try to draw the Feynman graph of some processes.

http://smg.photobucket.com/albums/v488/nikko9000/?action=view&current=reactions.jpg

2. Homework Equations

Parity, isospin, baryon number, lepton number, strangeness conservation. Maybe more

3. The Attempt at a Solution

a) Seems like an allowed interaction.
b) allowed?
c) Ive never heard of this kind of reaction, so id guess its not allowed. Cant figure out why.
d) Dunno what [tex]\nu\mu[/tex] is or what quantum numbers it has.
e) I cant find information on the strange type particles.
f) Dont know what W particles are
g) allowed i think
h) dont know quantum numbers of any particles except the two last

Wish i had a book which actually had enough content to make it possible to answer questions on the mandatory assignments :( plz help anyone
 
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