L2 chains for single-beam menu Muon full reconstruction T2Calo starting from MBTS Ricardo Gonçalo, Denis Damazio.

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Presentation transcript:

L2 chains for single-beam menu Muon full reconstruction T2Calo starting from MBTS Ricardo Gonçalo, Denis Damazio

Status report The goal is to exercise trigger algorithms using single beam data Most events will be empty Beam-gas : can look like an event with CM frame hugely boosted wrt the lab Beam-halo : it’s beam-gas upstream of ATLAS; looks like muons parallel top the beam Would like to use these topologies to run calorimeter and muon algorithms at L2 – Where to start from (L1 item) – How to produce RoIs – What chains to configure? Pretty much starting/ongoing work and not much to show yet – Will shamelessly use this meeting to get some opinions and then implement what seems sensible Ricrdo GonçaloTrigger Menus - 26 Aug

L2 muon full scan Plan to use a chain modified from mu4_dimu_fs Starts from L1_MU4 HLT chain counter 390 – L2_MU4_DiMu_FS – EF_MU4_DiMu_FS Uses TrigDiMuonFast at L2 Plan to use existing L2 setup in new chain A muon trigger from the endcap is possible (see talk by Masaya) in the last Core & Slices meeting Ricrdo GonçaloTrigger Menus - 26 Aug

T2Calo_egamma starting from MBTS For regular menu: – Two chains starting from either MBTS_A or MBTS_C. – MBTS_A one starts EndCapA (positive eta) egamma chain. – MBTS_C does the same for a negative eta egamma chain. – Still missing chain names definition? – Again T2Calo in forced positions. OR: – All TE to generate RoI position from MBTS id (16 MBTS scintillators on each side) – Changes to Electron.py? – Need some data sample which has MBTS information for the default menu and calorimeter (Will? Regina? David?) – Rates? (well…luminosity?) For cosmics Start from any MBTS_Ax or MBTS_Cy L1 items Use AllTE algorithm by Alex Cerri to combine the MBTS TEs Start one chain for side A and one for side C RoI forced to be big chunk of endcaps Chain proceeds as normal for photons Add ID part when possible? Initial prototype built by Denis and submitted to Alex Ricrdo Gonçalo4Trigger Menus - 26 Aug. 2008

Egamma chain Plan for egamma single-beam: – Starting from L1_EM3 (?) e5_allTracking e5_SiTracke 5_IDSCAN e5_TRTSegFinder – These could be the chains starting from MBTS e5_unseeded – with L2 tracking g5 (ie, e5_noTrack) The cleanest way would be to have AllTE algos to start off the unseeded chains Alternative to start 2 chains from MBTS_A and MBTS_C Event Filter egamma with AllTE from Phillip (see next talk) L2 tracking not yet ready – experts busy Ricrdo GonçaloTrigger Menus - 26 Aug

Conclusions Not very much to show yet, work ongoing Finding best way to create these chains Expect to have something next week Ricrdo GonçaloTrigger Menus - 26 Aug

backup Ricrdo GonçaloTrigger Menus - 26 Aug

Ricrdo GonçaloTrigger Menus - 26 Aug