Great! I understand now the equations you wrote and such a neat proof of cross section ratio to be 2. However, why did u rewrite the reactions as
1) μ+ν → ∑0p
2) μ+ν → ∑+n
What is the logic behind rewriting the processes as above instead of
1') vp → μ+∑0
2') vn → μ+∑-
This...
I read in a paper http://nngroup.physics.sunysb.edu/~nngroup/misc/Documents/NeutrinoReactionsAtAcceleratorEnergies.pdf that delta_I = 1/2 rule of the strangeness-changing weak current implies the ratio of cross section of proton->Ʃ0 process to neutron->Ʃ- process to be 1/2. The delta_I = 1/2...
yes, I should have posted the reference paper. Sorry my first time ever on this forum. Here you can see an old paper http://nngroup.physics.sunysb.edu/~nngroup/misc/Documents/NeutrinoReactionsAtAcceleratorEnergies.pdf. The delta_I = 1/2 rule is mentioned just before equation (3.40) on page 317...
I read in a paper that delta_I = 1/2 rule of the strangeness-changing weak current implies the ratio of cross section of proton->Sigma0 process to neutron->Sigma- process to be 1/2. I do not understand what is this selection rule and how does it effect the cross section ratio of the 2 processes...