- #1

Skatch

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## Homework Statement

A proton and antiproton at rest in an S-state annihilate to produce [tex]\pi[/tex]

^{0}[tex]\pi[/tex]

^{0}pairs. Show

that this reaction cannot be a strong interaction.

## Homework Equations

I interpret this problem as:

p + p_bar -> [tex]\pi[/tex]

^{0}+ [tex]\pi[/tex]

^{0}

## The Attempt at a Solution

If this were a strong interaction, Parity should be conserved, yes? I think that in the annihilation

described above, parity is not being conserved.

But really, my first question is, am I interpreting it correctly? Is the annihiliation producing [tex]\pi[/tex]

^{0}+ [tex]\pi[/tex]

^{0}?

Or is it producing [tex]\pi[/tex]

^{0}+ [tex]\pi[/tex]

^{0}+ [tex]\pi[/tex]

^{0}+ [tex]\pi[/tex]

^{0}? Not sure what they mean by "[tex]\pi[/tex]

^{0}[tex]\pi[/tex]

^{0}pairs".

Then my next question is, what is the Parity of p_bar?

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