Access IDs of Entries in a given Tree Selection

Dear All,

I have one question concerning the use of TTree.

I am storing some data inside a Tree. Afterwards, I would like to be able selecting only the entries according to some selection criteria.
Since I need to post-process those entries, it is not enough to Draw() them with a “selection”. I should instead be able retrieving the index of each single entry fulfilling the selection criteria.

Is it possible with the current TTree methods?

I thank you for your support.

Best regards

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