Higgs Hunting 2026

16 sept. 2026, 09:00 → 18 sept. 2026, 19:00 Europe/Paris

IJCLab Orsay / APC Paris

The origin of Electroweak symmetry breaking is one of the central topics of research in fundamental physics. The discovery of a Higgs boson at CERN on July 4th, 2012, following a hunt that spanned several decades and multiple colliders, changed the landscape of these investigations and provided key evidence for the Brout-Englert-Higgs mechanism of mass generation through the spontaneous breaking of Electroweak symmetry.

More than ten years later, the hunt goes on several fronts, in particular for:

• New physics through precision studies of the properties of the Higgs boson : in particular its mass, spin and couplings to other Standard Model particles.
• New production and decay modes, in particular in processes involving multiple Higgs bosons which provide key insight into the shape of the Higgs potential.
• New Higgs-like states and signals for physics beyond the Standard Model.

 

The 16th workshop of the « Higgs Hunting » series organized on September 16-18, 2026 will present an overview of these topics, focusing in particular on new developments in the LHC Run-2 analyses, detailed studies of Higgs boson properties and possible deviations from Standard Model predictions. Highlights will also include new results from LHC Run 3 analyses, prospects from studies at future colliders, and recent theoretical developments.

The workshop will be held in person in Orsay, for the first day and Paris for the two following days, to continue the Higgs Hunting tradition of lively discussions during and after the sessions. Remote participation will also be made possible for those unable to attend in person. No registration fees are asked for remote participation.

François Englert passed away on June 18th 2026. In 1964 , together with Robert Brout, he proposed that spontaneous symmetry breaking could provide masses for the mediators of the weak interactions, the W and Z bosons. At the same time, British physicist Peter Higgs had independently hypothesised the existence of the same mechanism.   The existence of the Brout-Englert-Higgs field was proved in 2012 with the discovery of its associated particle by the  ATLAS and CMS experiments at the LHC. The following year, the Nobel Prize in Physics was awarded jointly to François Englert  and Peter Higgs since Robert Brout had already passed away at this time.

Registration deadline: July 27, 2026

affiche_HH2026_chardin_V7_HD_0526.pdf

RER_to_Auditorium.pdf

mer. 16 septembre

09:00 → 09:55 Registration (with coffee and croissants)

09:55 → 10:00 Prelude from the organizers

10:00 → 10:45 Plenary: Theory overview

Président de session: Matthias Schroeder (University of Hamburg)

10:00 Advances in Higgs Boson Theory

Orateur: Matthias Steinhauser (Karlsruhe Institute of Technology)

10:45 → 11:30 Topical talks: Part 1

Président de session: Matthias Schroeder (University of Hamburg)

10:45 Hidden new physics in PDF fits

Orateur: Ella Cole (Cambridge)

11:00 Gauge anomalies on shell and collinear factorization

Orateur: Edoardo Alviani (IJClab Orsay)

11:15 Measurements of the Higgs boson inclusive and differential fiducial cross sections in the four-lepton decay channel with the ATLAS detector using partial Run 3 data

Orateur: Elena Cuppini (MPI Munich)

11:30 → 12:55 Plenary: H(125) properties

Président de session: Matthias Schroeder (University of Hamburg)

11:30 H(125) property measurements - ATLAS

Orateur: Matthew Basso (TRIUMF (CA))

11:50 H(125) property measurements - CMS

Orateur: Tongguang Cheng (Beihang University)

12:10 H(125) property measurements - Overview

12:15 H(125) property measurements - Discussion of current status and prospects

12:55 → 14:00 Lunch

14:00 → 14:25 Coffee

14:25 → 14:40 Topical talks: Part 2

14:25 Measurement of the CP structure of the Higgs boson to tau lepton Yukawa coupling at CMS

Orateur: Lucas Russell (Imperial College, Univ. of London)

14:40 → 15:45 Plenary: H(125) self-coupling and pair production

14:40 H(125) self-coupling and pair production - CMS

Orateur: Soumya Mukherjee (UC San Diego)

14:55 H(125) self-coupling and pair production - ATLAS

Orateur: Shota Izumiyama (Nagoya University)

15:10 H(125) self-coupling and pair production - Overview

15:15 H(125) self-coupling and pair production - Discussion

15:45 → 16:30 Plenary: Analysis methods

15:45 Analysis methods - CMS

Orateur: Zak Lawrence (Univ. Catholique de Louvain)

16:00 Analysis methods - ATLAS

Orateur: Thomas Strebler (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))

16:15 Analysis methods - Overview

16:20 Analysis methods - Discussion

16:30 → 17:00 Coffee break

17:00 → 17:42 Topical talks: Part 3

17:00 Search for nonresonant triple Higgs boson production in the six b quark final state in proton-proton collisions at CMS

Orateur: Xinyue Geng (Peking Univ.)

17:15 Search for non-resonant Higgs boson pair production in the bbtautau final state using Run 2 + partial Run 3 data recorded by the ATLAS detector

Orateur: Leonardo Splendori (CPPM Marseille)

17:30 Combined Run 2 and Run 3 Measurement of ttH and tH Production in H tautau with ATLAS

Orateur: Morvan Vincent (IFIC Valencia)

17:45 → 18:10 Plenary: ATLAS Joker talk

Président de session: Suzanne GASCON (Ip2I Lyon)

18:10 → 19:00 Plenary: Historical talk

Président de session: Suzanne GASCON (Ip2I Lyon)

18:10 TBA

Orateur: David Gross (Kavli Institute for Theoretical Physics, UC Santa Barbara)

19:00 → 20:30 Welcome cocktail

jeu. 17 septembre

09:30 → 10:00 Welcome coffee

10:00 → 10:25 Plenary: CMS Joker talk

Président de session: Sven Heinemeyer (IFT/IFCA (CSIC))

10:00 CMS Joker talk (TBA)

10:25 → 12:15 Plenary: H(125) BSM aspects and searches for new scalar bosons

Président de session: Sven Heinemeyer (IFT/IFCA (CSIC))

10:25 H(125) BSM aspects and searches for new scalar bosons - ATLAS

Orateur: Edson Carquin Lopez (Universidad Tecnica Federico Santa Maria)

10:40 H(125) BSM aspects and searches for new scalar bosons - CMS

Orateur: Georgia Karapostoli (National Technical University of Athens)

10:55 Status of deviations from the SM in the Higgs sector

Orateur: Livia Soffi (INFN Rome)

11:30 H(125) BSM aspects and searches for new scalar bosons - Overview

11:35 H(125) BSM aspects and searches for new scalar bosons - Discussion

12:15 → 13:00 Topical talks: Part 4

Président de session: Sven Heinemeyer (IFT/IFCA (CSIC))

12:15 Accidentally light scalars: naturalness and cosmology

Orateur: Giacomo Ferrante (Université Libre de Bruxelles)

12:30 Phenomenology of the light CP odd Higgs

Orateur: Claire Chevallier (IJCLab)

12:42 Search for additional Higgs bosons decaying to a pair of tau leptons with CMS

Orateur: Leyan Li (Peking Univ.)

13:00 → 14:25 Lunch buffet

14:25 → 15:50 Plenary: Effective field theories

14:25 Effective field theories - Theory overview

Orateur: Eleni Vryonidou (University of Cyprus)

14:45 Effective field theories - CMS

Orateur: Andrew Gilbert (LLR, Ecole Polytech., IN2P3-CNRS)

15:00 Effective field theories - ATLAS

Orateur: Michiel Jan Veen (University of Massachusetts, Amherst)

15:15 Effective field theories - Overview

15:20 Effective field theories - Discussion

15:50 → 16:20 Topical talks: Part 5

15:50 Two-loop RGE effects in EFT fits

Orateur: Alejo Rossia (Padova)

16:05 SMEFT fits

Orateur: Marion Thomas (MPI Munich)

16:20 → 17:00 Plenary: Vision talk

16:20 After the Higgs: Looking for the Universe Behind the Particle

Orateur: Veronica Sanz (Universitat de Valencia)

17:00 → 17:01 Dinner information

17:01 → 18:00 Travel to Excursion and dinner at Musée d'Orsay

18:00 → 21:00 Visit of Musée d'Orsay and dinner

ven. 18 septembre

09:30 → 10:00 Welcome coffee

10:00 → 10:47 Topical talks: Part 6

Président de session: Daniela Bortoletto (University of Oxford)

10:05 Search for the Rare Higgs Boson Decay H → Zγ with Run 2 and Early Run 3 CMS Data

Orateur: Jiehan He (Peking Univ.)

10:20 Advances in Hadronic Tau Reconstruction and Identification in ATLAS Using Graph Neural Networks

Orateur: Pradhan Sudev (University of Sheffield)

10:35 ZH cross section, Higgs Mass and Branching Ratio measurements in ZH events at FCC-ee, at 240 and 365 GeV

Orateur: Tom Fournier (APC Paris)

10:45 → 12:45 Plenary: Prospects for Higgs boson physics at future circular colliders

Président de session: Daniela Bortoletto (University of Oxford)

10:45 Theory roadmap towards FCC

Orateur: Laura Reina (Florida State University (US))

11:05 Experimental roadmap towards FCC

Orateur: Guy Wilkinson (University of Oxford)

11:25 Status of CEPC

Orateur: Yifang Wang (IHEP)

11:45 Discussion

12:45 → 14:00 Lunch buffet

14:00 → 14:30 Plenary: Higgs boson and cosmology

Président de session: Barbara Clerbaux (Université Libre de Bruxelles)

14:00 The Higgs boson and cosmology

Orateur: Shinya Kanemura (Osaka University)

14:30 → 16:00 Plenary: Concluding talks

Président de session: Barbara Clerbaux (Université Libre de Bruxelles)

14:30 Theory concluding talk

Orateur: Pier Monni (CERN)

15:15 Experimental concluding talk

Orateur: Marco DELMASTRO (CNRS/IN2P3 LAPP)

16:00 → 17:00 Farewell coffee