
#1
Mar1012, 11:26 PM

P: 18

1. The problem statement, all variables and given/known data
So all I want to know is how you tell if it is a strong or weak force interaction. e.g. K^+ = pi^0 + pi^0 + pi^+ (all mesons) So i determined that the energy was concerved: 493.7135135139.6=84.1MeV baryon and Lepton numbers are also conserved (0)=(0) Now having determined that the interaction is possible, how do I tell if it is via strong or weak force. 



#2
Mar1212, 09:05 AM

P: 39

The key here is to look at the quark content of the reactants and products. A positive kaon has an up and an antistrange quark. Yet none of the pions contain a strange/antistrange quark.
What is the only interaction capable of changing the flavour of quarks? 



#3
Mar1212, 09:01 PM

P: 18

So in this case weak force?




#4
Mar1212, 09:16 PM

P: 39

Strong or weak force?? 



#5
Mar1212, 09:57 PM

P: 18

Righto Got it now. Thanks!



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