I would really just like to know if I'm on the right track here in terms of if reactions can go ahead or not... The reactions are in latex and my thoughts are below each one..(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

For each of the following processes say whether it is a strong, electromagnetic or weak process or whether it is forbidden in the standard model and explain the reasons.

Process 1

[tex]K^{0} \rightarrow \pi^{+}+e^{-}[/tex]

Charge conserved

Mass conserved

Lepton Number - not conserved

Baryon Number - no baryons

Spin - (-1/3)(1/3) -> (2/3)(1/3) + (1/2) not conserved

Strangeness - not conserved

Therefore not possible

It would have been a weak interaction though?

Process 2

[tex]e^{-}+p \rightarrow n+\upsilon_{\mu}[/tex] (the final thing should be a muon neutrino)

Charge conserved

Mass conserved

Lepton Number - not conserved

Baryon Number - conserved

Spin - (1/2) + (1/2) -> (1/2) + (0) not conserved

Strangeness - conserved

Therefore not possible

It would have been a weak interaction though?

Process 3

[tex]\Delta^{0} \rightarrow \pi^{+}+n[/tex]

Charge conserved

Mass conserved

Lepton Number - no leptons

Baryon Number - conserved

Spin - ???? -> 0 + (1/2) no idea

Strangeness - conserved

Therefore possible? (dependent on spin)

It would be a weak interaction

Process 4

[tex]K^{0} + n \rightarrow \Lambda + \pi^{0}[/tex]

Charge conserved

Mass conserved

Lepton Number - no leptons

Baryon Number - ????????

Spin - ??????????

Strangeness - not conserved (s in the K, anti-s in the lambda)

Therefore possible? (dependent on spin & baryon number)

It would be a weak interaction

Process 5

[tex]\Xi^{0} \rightarrow \Lambda + \pi^{0}[/tex]

Charge conserved

Mass conserved

Lepton Number - no leptons

Baryon Number - ????????

Spin - ??????????

Strangeness - not conserved (ss in the Xi, s in the lambda)

Therefore possible? (dependent on spin)

It would be a weak interaction

Also, In what situation would it be a strong interaction?

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# Homework Help: Allowed Reactions

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