L3 Algorithms Group: brief overview of current activities and plans

New code implemented in p15

• use gcc compiler
• improved algorithms for track-based 3-D primary vertex finding: Chris Barnes, Per Jonsson
• p_t dependent errors for track impact parameters: Per Jonsson
• L3 configuration information (Michiel Sanders, Per Jonsson, Gordon Watts, Scott Snyder, Jon Hays):
  • online download to L3 supervisor via COOR
  • logging -> runs database
  • automatic configuration for L3 trigsim
  This facility can be used, for example, to input run-by-run knowledge of beam spot position from vertex examine for the use of the 3D event vertex and IP-based b-tagging tools.
• New filter to cut on the z position of the primary vertex
  New tool to produce vertex position physics results: Andy Haas.
• Start implementation of new packages for each physics tool to define the physics_results.

New code planned for p16

• improvement of the performance of charged particle tracking in the central region: Arizona and Imperial College groups
• extension of central tracking into forward region: Arizona group
• muons:
  • di-muon filters (for single and di-muon triggers at L1/L2): Martin Wegner?
  • write a tool to match central tracks to calorimeter mips for muon indentification: Martin Wegner?
• refined treatment of electron shower shape: Ulla Blumenschein, Volker Buescher
• Reorganize electron tool so that most cuts are made in the filter rather than, as at present, in the electron tool.
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• cps calibration: Andre Turcot, Yi Jiang
• fpd unpacking and reconstruction: Tamsin Edwards
• "physics" tools, e.g.:
  • mass, delta eta, etc, calculations
    NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
  • identification of physics event types:
    • J/Psi -> di-muon: Ike Hall
    • Z -> di-muon: Emily Nurse/Terry Wyatt
    • Upsilons, W, electron decays ?
      NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• Tick and turn unpacking and checking for each calorimeter crate (and trackers and muons)?
  Where should this be done and what action should be taken as a result of finding problems?
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• getting rid of run_config_mgr?
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• development of user analysis tools beyond those available in the analysis_example package
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• fps unpacking and reconstruction
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• study whether or not we need to write a tool to do secondary vertexing (to complement the impact-parameter based tool for b-tagging). This is likely to be a project to be worked on by Tim Scanlon.
• study whether or not it would be sensible to decouple Level-3 from the offline muon code
  NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
• Cleaning up L3 error messages: all tool/filter authors, coordinated by Jon Hays
• Complete the implementation of new packages for each physics tool to define the physics_results.
  (Aim is to allow TMB/DST analysis without having to link in the entire L3 tool/filter code.)

Other Work In Progress (Not necessarily tied to any particular new code release)

• central infrastructure:
  • overall code management: Jon Hays and Angela Bellavance
  • L3 infrastructure for TrigSim: Angela Bellavance
  • streaming infrastructure: Jon Hays
  • L3 thumbnail information: Peter Tamburello
• electron tool - central track match: Ulla Blumenschein? Luiz Mundim?
• cft-only tracking: Ray Bueselinck + IC students
  • update certification for online running with latest data and infrastructure
  • quantitative performance comparison with global tracking
• tool maintenance:
  • smt and cft unpacker and tracking code: Ray Bueselinck
  • calorimeter unpacking: Marumi Kado
  • muon unpacking: Christophe Clement
  • Many other tools have nobody working on new developments and nobody signed up for routine maintenance!!!
• primary vertex z position, non-linearity corrections and L3Nada - studying knock-on effects on MET, electrons and jets: Lee Sawyer, Markus Klute, Reinhard Schwienhorst, Andy Haas, Luiz Mundim.
• L3 monitoring:
  • L3 filter server (l3fmon): Moacyr Souza
  • maintenance of l3fanalyze: Jon Hays
  • l3fanalyze run online as an "examine": Elliot Cheu
  • use of L3 tracking in vertex_examine: Michiel Sanders
  • on/offline comparator: Han Do
  • common job submission for certification and verification - organization and infrastructure ???
    NOBODY WORKING ON THIS IN LEVEL-3 AT THE MOMENT!!!
    More interaction with Josh Dyer, who does general trigsim certification plots, would be worthwhile.
• L3 aspects of the Monte Carlo trigger list: Terry Toole and Terry Wyatt
• display of L3 physics_results in the event display: Laurent Duflot
• user analysis documentation and analysis_example for L3: Erich Varnes

New code for p14

New code for p13

• thumbnail - Peter Tamburello (50%?)
• first version of track-based 3-D primary vertex finding (not for online use): Chris Barnes (50%), Per Jonsson (10%)
• major upgrades for (offline) muons.
  • improved segments
  • revised way to select good segments
  • overlap region
  • time-distance relation
  • corrections for time of flight
  • use correct rcp file for L3: muo_segmentlinkedlist/rcp/MuoSegmentLLReco_L3.rcp
  • increase by factor 2 in time for L3Muon wrt p11
• b-tag infrastructure:
  • impact parameter: Per Jonsson (50%)
  • could not be run online because of the lack of run-by-run knowledge of beam spot position or event by event primary vertex.
• wrapper for track filter to produce physics_results: Chris Barnes
• infrastructure for inclusive monitor stream: Jon Hays
• auto-config for smt/cft unpackers: implemented by Robert Illingworth
• Look here for description of some more technical detail

New code implemented in p12

• jet acoplanarity and Ht filters: Dan Claes
• electron Tool: Volker Buescher + Florian Beaudette
  • additional electron id using road method
• tau Tool: Yann Coadou (50%)
  • update tracking code (change track extrapolation method, allow cut on # tracks)
  • allow more parameters to be tunable by .rcp or trigger list
• cft-only tracking: Ray Bueselinck
  • speed and efficiency improvements (particularly stereo tracking)
• missing E_T Tool: Lee Sawyer
  • implementation of hot cell killing
• track-based primary vertex in z: Chris Barnes
  • implement improved algorithm
• 2.5 sigma zero suppression in calorimeter unpacker: Marumi Kado
• cps: Chunhui Han
  • unpacking and mapping
• central Infrastructure: Jon Hays
  • streaming
  • automate generation of tool lists for l3fanalyze
• Look here for description of some more technical detail