Spin alignment test with a₂

[shenvitor]

• See also Create a notebook using ampform-dpd for eta-pi-p just like the one for lambda-k-pi #97

[shenvitor]

@redeboer
Maybe this issue means later I should include the use of ampform-dpd?
If so, or this is a separate issue, then maybe I should create a new issue.

[redeboer]

Yeah probably better to use ampform-dpd. But are you using two subsystems or only the subsystem that has a2?

[shenvitor]

Yeah probably better to use ampform-dpd. But are you using two subsystems or only the subsystem that has a2?

As we saw previously: only one subsystem ($\eta \pi^0$: two mesons) can have $a_2$ resonance, the other two subsystems ($\pi p$ and $\eta p$: a meson and a baryon) can't have $a_2$.
So I guess the subsystem that has $a_2$?

Actually, I am wondering if we should also do this to the two subsystems with N* or Delta too later maybe? 🤔

[redeboer]

Dalitz-Plot Decomposition is only needed if there are multiple subsystems. $\Delta$ with N would be an example, but for the channel with a2 you can also include another resonance that lives in another subsystem (maybe $\Delta$ or N actually, but thought you were studying those in a different final state).