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 Registration (with coffee and croissants)

1 Prelude from the organizers

Higgs Hunting 2026 Introduction Slides.pdf

Plenary: Theory overview

Président de session: Matthias Schroeder (University of Hamburg)

2 Advances in Higgs Boson Theory

Orateur: Matthias Steinhauser (KIT)

Recording

steinhauser.pdf

Topical talks: Part 1

Président de session: Matthias Schroeder (University of Hamburg)

3 Hidden new physics in PDF fits

Orateur: Eleanor Cole

Higgs2026_COLE.pdf

Recording

4 Gauge anomalies on shell and collinear factorization

Orateur: Edoardo Alviani (IJClab Orsay)

Alviani_Anomalies.pdf

Recording

5 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 (Max Planck Society (MPP))

cuppini-h4l-HiggsHunting26.pdf

Recording

Plenary: H(125) properties

Président de session: Matthias Schroeder (University of Hamburg)

6 H(125) property measurements - ATLAS

Orateur: Matthew Basso (TRIUMF (CA))

Matthew_Basso_Higgs_property_measurements_with_ATLAS.pdf

Recording

7 H(125) property measurements - CMS

Orateur: Tongguang Cheng

Higgs125_HH2026.pdf

Recording

8 H(125) property measurements - Overview

Orateur: Matthias Schröder (University of Hamburg)

2026-09-16_HiggsHunting_Paris.pdf

9 H(125) property measurements - Discussion of current status and prospects

Recording

12:55 Lunch

14:00 Coffee

Topical talks: Part 2

Président de session: Nicolas CHANON (IP2I Lyon)

10 Measurement of the CP structure of the Higgs boson to tau lepton Yukawa coupling at CMS

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

CPinHTauTau_HiggsHunting_LR.pdf

Recording

Plenary: H(125) self-coupling and pair production

Président de session: Nicolas CHANON (IP2I Lyon)

11 H(125) self-coupling and pair production - CMS

Orateur: SOUMYA Mukherjee (Univ. of California San Diego (US))

Recording

SM_Higgs_Hunting_Sep_2026.pdf

12 H(125) self-coupling and pair production - ATLAS

Orateur: Shota Izumiyama (Nagoya University)

ATL-COM-PHYS-2026-669.pdf

Recording

13 H(125) self-coupling and pair production - Overview

Orateur: Nicolas CHANON (IP2I Lyon)

NC_HiggsHunting_SessionHH_Overview.pdf

14 H(125) self-coupling and pair production - Discussion

Recording

Plenary: Analysis methods

Président de session: Nicolas CHANON (IP2I Lyon)

15 Analysis methods - CMS

Orateur: Zak Lawrence (Univ. Catholique de Louvain)

Analysis Methods in CMS.pdf

Recording

16 Analysis methods - ATLAS

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

AnalysisMethods_ATLAS_HH2026_Strebler.pdf

Recording

17 Analysis methods - Overview

Orateur: Nicolas CHANON (IP2I Lyon)

NC_HiggsHunting_SessionTool_Overview.pdf

18 Analysis methods - Discussion

Recording

16:30 Coffee break

Topical talks: Part 3

Président de session: Suzanne GASCON (Ip2I Lyon)

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

Orateur: Xinyue Geng (Peking University)

HHH_xinyue.pdf

Recording

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

Orateur: Pradhan Sudev (University of Sheffield)

document.pdf

Recording

21 Combined Run 2 and Run 3 Measurement of ttH and tH Production in H tautau with ATLAS

Orateur: Morvan Vincent (IFIC (CSIC-UV) Valencia)

ATL_COM_PHYS_2026_658.pdf

Recording

Plenary: ATLAS Joker talk

Président de session: Suzanne GASCON (Ip2I Lyon)

22 Improved analysis of non-resonant Higgs boson pair production in the bb̄ τ⁺τ⁻ final state

Orateur: Salah-Eddine Dahbi (Academia Sinica (TW))

ATLAS_HHbbtautau_talk_HiggsHunting_2026.pdf

Recording

Plenary: Historical talk

Président de session: Suzanne GASCON (Ip2I Lyon)

23 A Half Century of the Standard Theory

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

Half Century of the STANDARD THEORY.pdf

Recording

19:00 Welcome cocktail

jeu. 17 septembre

09:30 Welcome coffee

Plenary: CMS Joker talk

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

24 Searching for HH in the bbττ final state at CMS

Orateur: Davide Zuolo (University of Colorado - Boulder)

LoZuolo_bbtautau_CMS.pdf

Recording

Plenary: H(125) BSM aspects and searches for new scalar bosons

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

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

Orateur: Edson Carquin Lopez (Federico Santa Maria University)

HiggsHuntingTalk3.pdf

Recording

26 H(125) BSM aspects and searches for new scalar bosons - CMS

Orateur: Georgia Karapostoli (National Technical University of Athens)

BSMscalarsCMS_HH2026_170926.pdf

Recording

27 Status of deviations from the SM in the Higgs sector

Orateur: Livia Soffi (INFN Rome)

HH2026-LS-V7.pdf

Recording

28 H(125) BSM aspects and searches for new scalar bosons - Overview

Orateur: Sven Heinemeyer (IFT/IFCA (CSIC))

sven.pdf

29 H(125) BSM aspects and searches for new scalar bosons - Discussion

Recording

Topical talks: Part 4

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

30 Accidentally light scalars: naturalness and cosmology

Orateur: Giacomo Ferrante (ULB)

Ferrante_HiggsHunting26.pdf

Recording

31 Phenomenology of the light CP odd Higgs

Orateur: Claire Chevallier (IJCLab)

chevallier-higgs-hunting-2026.pdf

Recording

32 Search for additional Higgs bosons decaying to a pair of tau leptons with CMS

Orateur: Leyan Li (Peking Univ.)

HH_2026_BSM_Htautau_CINCO.pdf

13:00 Lunch buffet

Plenary: Effective field theories

Président de session: Pierre Savard (University of Toronto)

33 Effective field theories - Theory overview

Orateurs: Eleni Vryonidou (University of Cyprus), Eleni Vryonidou (CERN)

Recording

Vryonidou_HiggsHunting.pdf

34 Effective field theories - CMS

Orateur: Andrew Gilbert (LLR / CNRS / École Polytechnique)

HH2026-EFT-CMS.pdf

Recording

35 Effective field theories - ATLAS

Orateur: Michiel Jan Veen

MichielVeen_HiggsHunting2026.pdf

Recording

36 Effective field theories - Overview

Orateur: Pierre Savard (University of Toronto and TRIUMF)

HH_EFT_Discussion.pdf

37 Effective field theories - Discussion

Recording

Topical talks: Part 5

Président de session: Pierre Savard (University of Toronto)

38 SMEFT fits

Orateur: Marion Thomas (Max Planck Institut für Physik)

MarionThomas_HiggsHunting.pdf

Recording

39 Two-loop RGE effects in EFT fits

Orateur: Alejo Nahuel Rossia (Padova)

Recording

Rossia_HiggsHunting26.pdf

Plenary: Vision talk

Président de session: Pierre Savard (University of Toronto)

40 After the Higgs: Looking for the Universe Behind the Particle

Orateur: Veronica Sanz Gonzalez (Universitat de Valencia)

Recording

VisionHiggsHunting.pdf

41 Dinner information

Higgs Hunting 2026 Dinner Information.pdf

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

18:00 Visit of Musée d'Orsay and dinner

ven. 18 septembre

09:30 Welcome coffee

Topical talks: Part 6

Président de session: Daniela Bortoletto (University of Oxford)

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

Orateur: Jiehan He (Peking Univ.)

Higgs Hunting 2026 H ZGamma.pdf

Recording

43 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)

HiggsHunting2026_LeonardoSplendori.pdf

Recording

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

Orateur: Tom FOURNIER (APC, CNRS/IN2P3 and Université Paris Cité (FR))

Higgs_hunting_FCC_Fournier.pdf

Recording

Plenary: Prospects for Higgs boson physics at future circular colliders

Président de session: Daniela Bortoletto (University of Oxford)

45 Theory roadmap towards the FCC

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

higgshunting26.pdf

Recording

46 Experimental roadmap to the FCC

Orateur: Guy Wilkinson (University of Oxford)

paris_wilkinson_180926.pdf

Recording

47 CEPC and the Future Plan of HEP in China

Orateur: Yifang Wang (IHEP)

CEPC-Higgs Hunting2.pdf

CEPC-Higgs Hunting2.pptx

Recording

48 Overview and discussion

Orateur: Daniela Bortoletto

DB_Higgs_Hunting_discussion.pdf

DB_Higgs_Hunting_discussion.pptx

Recording

12:45 Lunch buffet

Plenary: Higgs boson and cosmology

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

49 The Higgs boson and cosmology

Orateur: Shinya Kanemura (Osaka University)

HiggsHunting2026_SKanemura.pdf

Recording

Plenary: Concluding talks

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

50 Theory concluding talk

Orateur: Pier Monni (CERN)

document final Pier Monni.pdf

Recording

51 Experimental concluding talk

Orateur: Marco DELMASTRO (CNRS/IN2P3 LAPP)

Delmastro_2026-09-18_HiggsHunting2026_ExpSummary.pdf

Recording

16:00 Farewell coffee