CMS b-tagging & Vertexing POGlink
Introductionlink
This group is responsible for all aspects of b tagging, including algorithm development, performance measurements with data, HLT, and the corresponding online and offline DQM tasks. It is also responsible for vertex fitting and secondary vertex finding. It shares responsibility for offline primary vertex finding with the Tracking POG. Beam-spot determination, V0 reconstruction, and online primary vertex finding are pure TrackingPOG responsibilities.
BTV public resultslink
See here
Organizationlink
- Group Conveners: Alexandre de Moor (VUB), Alessandro Calandri (Universita e INFN, Firenze)
Previous conveners
- August 2025 - present: Alexandre de Moor (VUB), Alessandro Calandri (Universita e INFN, Firenze)
- September 2023 - August 2025: Sebastian Wuchterl (CERN), Spandan Mondal (Brown University)
- September 2021 - August 2023: John Alison (Carnegie Mellon), Soureek Mitra (KIT)
Subgroupslink
| Subgroup | Coordinators | Documentation |
|---|---|---|
 Algorithms and Software |
Nurfikri Norjoharuddeen, Pavlo Kashko | Algorithms and Software |
 Performance and Calibration |
Emily Tsai, Matteo Marchegiani | Performance and Calibration |
 BTV@HLT |
Uttiya Sarkar, Soumya Mukherjee | BTV@HLT |
Contact positionslink
| Contact position | Responsible person | Task description |
|---|---|---|
| RECO | Soureek Mitra (mail) | Maintaining and updating RecoBTag and RecoBTau packages in CMSSW |
| Machine Learning contact (shared with JME) | Alexandre De Moor (mail) | Joint position with JME to monitor developments and recommendations from the ML group |
| btvNano + Framework | Valentyn Vaulin (mail) | Maintaining and developing PFNano for BTV requirements |
| b-hive | Niclas Eich (mail) | Maintaining and developing the b-hive framework for BTV |
| AlCaDB | Patin Inkaew (mail) | Joint position with JME, PF, and AlCa groups for studying detector alignment and calibration related impacts |
| DQM | Matteo Marchegiani (mail) | Maintaining and developing sequences for monitoring tagger performance, input variables in offline and HLT DQM |
| Tracking | Trevor Russel (mail) | Monitoring developments and recommendations from the TRK POG |
| Validation | Felix Heyen (mail), Maryam Shoostari (mail) | Validation of CMSSW releases based on b/c-tagging performance in simulation and collision data |
| MC | Robert Plese (mail), Victor Rodriguez (mail) | Preparing MC samples required for training and development, commissioining and calibration studies of various tagging algorithms |
| Upgrade | Daniel Bloch (mail) | BTV representative in the UPSG group |
| Documentation | Spandan Mondal / Sebastian Wuchterl (POG page), Nurfikri Norjoharuddeen (Software/Algo), Emily Tsai / Matteo Marchegiani (Validation/Commissioning/Performance), Uttiya Sarkar (BTV@HLT) |
Maintenance and update of the BTV Wiki pages with latest information |
BTV contacts across different PAGslink
| PAG | Responsible person |
|---|---|
| TOP | David Kavtaradze |
| HIG | Giovanni Celotto |
| SMP | Duong Nguyen |
| SUS | Shivani Sanjay Lomte |
| EXO | Arnab Laha |
| B2G | Mary Hill Hadley, Amitav Mitra |
| HIN | Lida Kalipoliti |