Handling of elastic interactions

How do we want to treat interactions without "new" particles, i.e. when only a few properties of the projectile are modified? Create a secondary (option A) or just modify the projectile (option B)?

Option A is certainly slower than B but has the advantage of preserving the whole history when we implement that option. If we opt for option B we do not find the particle in the history as it was produced on the stack anymore. Instead, we see it after it has undergone a number of these "elastic" interactions.

mentioned in merge request !100 (merged)

changed milestone to %ICRC2019

added Workshop label

mentioned in merge request !129 (merged)

It has to be Option A for consistency and logic. Speed is not a killer issue here.

I agree. We can move to option B in case we estimated the speed implications wrongly.

mentioned in issue #200 (closed)

changed milestone to %Full physics demonstratror

assigned to @mreininghaus

Max, I think you implemented this. Please have a look.

I implemented option B in !258 (merged) for the HadronicElasticModel. We delete projectiles after invoking DoInteraction(), so creating a new particle is currently the only way.

Indeed, so this issue is not an issue right now. Correct?

correct

closed

changed milestone to %History Version