Dark sector selections in the trigger for the LHCb Upgrade

In preparation for the increased luminosity of the next run of the LHC starting in 2022, LHCb is undergoing a major upgrade. These improvements include a removal of the hardware trigger, meaning the new system will be the first fully GPU-based trigger in high energy physics. The real-time analysis system must process over 5 TB/s and complete a full reconstruction of events. The final bandwidth has a maximum of 5 GB/s to long term storage, so it is crucial to persist data which contain the signature of physics of particular interest to the collaboration while discarding the rest with as much precision as possible. One such selection we are implementing is for di-muon and di-electron events which are a potential signature of a dark photon. LHCb has set world-leading limits on the dark photon and is projected to have an increased sensitivity to the dark photon from the increase in luminosity and upgraded detector.