LoKi functors

TIS functor

TIS is a (undocumented) LoKi functor， and it stands for Trigger Independent Signal. There's another similar term: TOS: Trigger On Signal.

Functor usage

TIS(<trigger_line_to_look>, <trigger_decision_storage_location>)

Note

<trigger_decision_storage_location> is a TES location

An example from lhcb-ana-2014-052-v2r1

INTREE((ABSID == 'mu+') & (TIS('L0.*', 'L0TriggerTisTos')))

The line above should be interpreted as following:

1. In the decay tree, find a \(\mu\).
2. We look over all L0.* trigger lines with TES L0TriggerTisTos, and require to have a trigger independent signal:
   • Since we are triggering on \(\mu\), this requires that the trigger cannot be due to the \(\mu\).
   • Also note that the whole decay tree is just a \(\mu\) and a \(D\), so it means that we are either TOS on \(D\), TIS in the whole event, or both.