2026 CMS-ATLAS Flavour Tagging Workshop

6 Jul 2026, 09:00 → 10 Jul 2026, 20:00 Europe/Zurich

Università degli Studi di Firenze - Centro Didattico Morgagni (University of Florence)

Alessandro Calandri (Università & INFN, Firenze (IT)), Alexandre De Moor (Vrije Universiteit Brussel (BE)), Angela Maria Burger (Centre National de la Recherche Scientifique (FR)), Dan Guest (Humboldt University of Berlin 📦), Francesco Armando Di Bello (Universita & INFN Pisa (IT)), Sebastian Wuchterl (CERN), Spandan Mondal (Brown University (US)), Valentina 🐧 Vecchio (University of Manchester)

ATLAS-CMS joint workshop to discuss the latest progress in the context of jet flavour tagging algorithms for online and offline reconstruction, their associated calibrations and validations on data.

This workshop is organised by the Dipartimento di Fisica, Università degli Studi di Firenze and Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Firenze.

 

 

Monday 6 July

1 Registration

Plenary: Opening plenary

2 Welcome and introduction

Speaker: Alessandro Calandri (Università & INFN, Firenze (IT))

3 Overview of Flavour Tagging in ATLAS and CMS

Speakers: Sebastian Wuchterl (CERN), Spandan Mondal (Brown University (US))

4 Tracking and vertexing in ATLAS

Speaker: Heather Gray (UC Berkeley/LBNL)

5 Tracking and vertexing in CMS

Speaker: Kai Kang (Vrije Universiteit Brussel (BE))

6 Discussion

7 Jets reconstruction in ATLAS

Speaker: Brendon Bullard (SLAC National Accelerator Laboratory (US))

8 Jets reconstruction in CMS

Speaker: Nurfikri Norjoharuddeen (Lappeenranta-Lahti University of Technology (FI))

9 Discussion

13:00 Lunch break

10 Tau reconstruction in ATLAS

Speaker: Nadav Michael Tamir (Tel Aviv University (IL))

11 Tau reconstruction in CMS

Speaker: Michal Bluj (National Centre for Nuclear Research (PL))

12 Discussion

13 Inputs on MC modeling relevant for FTAG in ATLAS

Speaker: Dr Federico Sforza (University and INFN Genoa)

14 Inputs on MC modeling relevant for FTAG in CMS

Speaker: Lorenzo Viliani (Universita e INFN, Firenze (IT))

15 Discussion

15:40 Coffee break

16 Flavour tagging at LHCb

Speaker: Borja Sevilla Sanjuan (La Salle, Ramon Llull University (ES))

17 Theory talk on b- and c-jets labelling

Speaker: Ludovic Michel Scyboz (Monash University)

Tuesday 7 July

Plenary: Software/algorithms

18 Summary of software/FTAG frameworks ATLAS

Speaker: Alexander Froch (Universite de Geneve (CH))

19 Summary of software/FTAG framework CMS

Speaker: Ulrich Willemsen (Rheinisch Westfaelische Tech. Hoch. (DE))

20 Discussion

21 Small-radius jets ATLAS

Speaker: Dmitrii Kobylianskii (Weizmann Institute of Science (IL))

22 Small-radius jets CMS

Speakers: Alexandre De Moor (Vrije Universiteit Brussel (BE)), Pavlo Kashko (Vrije Universiteit Brussel (BE))

23 Discussion

11:00 Coffee break

24 Large-radius jets ATLAS

Speaker: Edoardo Critelli (UCL (GB))

25 Large-radius jets CMS

Speaker: Congqiao Li (Peking University (CN))

26 Discussion

27 CMS ML-based Particle Flow reconstruction [remote]

Speaker: Farouk Mokhtar (Univ. of California San Diego (US))

13:00 Lunch break

ATLAS/CMS parallels

ATLAS Internal Session Agenda

CMS internal session agenda

Wednesday 8 July

Plenary: Calibrations

28 b-jet calibrations and combinations CMS

Speaker: Benedetta Camaiani (Universita e INFN, Firenze (IT))

29 b-jet calibrations ATLAS

Speaker: Cen Mo (Shanghai Jiao Tong University (CN))

30 Discussion

31 c- and light flavour jet calibration CMS

Speaker: Agostino De Iorio (National Taiwan University (TW))

32 c-jet calibration ATLAS

Speaker: Andrew Mehta (University of Liverpool (GB))

33 Light-flavour jet calibration ATLAS

Speaker: Alex Gavin (University of London (GB))

34 Discussion

10:50 Coffee break

35 Continuous calibration CMS

Speaker: Spandan Mondal (Brown University (US))

36 MC-MC, high pt extrapolations and alternative methods ATLAS

Speaker: Abderahmane Maiza (Julius Max. Universitaet Wuerzburg (DE))

37 Discussion

38 Boosted bb/cc calibration CMS

Speaker: Matteo Marchegiani (Carnegie-Mellon University (US))

39 Boosted bb/cc calibration ATLAS

Speaker: Zonghuan Duan (Nanjing University (CN))

40 Discussion

13:00 Lunch break

ATLAS/CMS parallels

ATLAS Internal Session Agenda

CMS internal session agenda

41 Workshop dinner

Thursday 9 July

Plenary: b-jet trigger

42 Commissioning of Run 3 trigger ATLAS

Speaker: Maggie Chen (LPSC Grenoble (CNRS/IN2P3, FR))

43 HLT training and commissioning CMS

Speaker: Uttiya Sarkar (Rheinisch Westfaelische Tech. Hoch. (DE))

44 HLT Physics performance Run 3 CMS

Speaker: Soumya Mukherjee (Univ. of California San Diego (US))

45 Heavy-Flavour identification at HLT ATLAS

Speaker: Lucas Bezio (Universite de Geneve (CH))

46 Boosted Xbb ATLAS

Speaker: Shota Izumiyama (Nagoya University (JP))

47 AK8 ParticleNet for bb tagging CMS

Speaker: Donato Troiano (Universita e INFN, Bari (IT))

11:00 Coffee break

48 Overview of fast inference techniques for flavour tagging and beyond

Speaker: Christopher Edward Brown (CERN)

49 Re-analysis on ALEPH LEP data using modern jet-flavour tagging

Speaker: Luka Lambrecht (Brown University (US))

13:00 Lunch break

ATLAS/CMS parallels

ATLAS Internal Session Agenda

CMS internal session agenda

Friday 10 July

Plenary: Closing

50 FTAG usage in physics analyses and the role of ML: an overview in ATLAS and CMS

Speaker: Loukas Gouskos (Brown University (US))

51 ATLAS summary from CMS perspective

Speakers: Alessandro Calandri (Università & INFN, Firenze (IT)), Alexandre De Moor (Vrije Universiteit Brussel (BE))

52 CMS summary from ATLAS perspective

Speakers: Angela Maria Burger (Centre National de la Recherche Scientifique (FR)), Valentina 🐧 Vecchio (University of Manchester)

53 Discussion

10:30 Coffee break

54 Outlook: open questions and future CMS

Speakers: Sebastian Wuchterl (CERN), Spandan Mondal (Brown University (US))

55 Outlook: open questions and future ATLAS

Speakers: Dan Guest (Humboldt University of Berlin 📦), Francesco Armando Di Bello (Universita & INFN Pisa (IT))

56 Closing remarks

Speaker: Alessandro Calandri (Università & INFN, Firenze (IT))

13:00 Lunch break

57 Workshop social activities