The 22nd Workshop of the LHC Higgs Working Group

from Wednesday, 3 December 2025 (09:00) to Friday, 5 December 2025 (17:30)
CERN (503/1-001)

        : Sessions
    /     : Talks
        : Breaks
3 Dec 2025
4 Dec 2025
5 Dec 2025
AM
09:00
Opening and joint LHC EFT / LHC Higgs plenary - Ennio Salvioni (UA Barcelona and IFAE) (until 10:35) (503/1-001 - Council Chamber)
09:00 Workshop opening - Ramona Groeber (Università di Padova and INFN, Sezione di Padova)  
09:15 ATLAS Highlight talk (15'+5') - Lydia Brenner (Nikhef)  
09:35 CMS Highlight talk (15'+5') - Jonathon Mark Langford (Imperial College)  
09:55 Double Higgs Production via Vector Boson Fusion in SMEFT (15'+5') - Michal Jakub Ryczkowski (Università di Padova and INFN, Sezione di Padova)  
10:15 Differential observables for Higgs-strahlung process to all orders in EFT (15'+5') - Sourav Bera (Tata Institute of Fundamental Research, Mumbai)  
10:35 --- Coffee break ---
11:10
Joint LHC EFT / LHC Higgs plenary - Anke Biekoetter (KIT Karlsruhe) (until 12:40) (503/1-001 - Council Chamber)
11:10 Global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables (15'+5') - Victor Miralles (University of Manchester)  
11:30 POPxf: An Exchange Format for Polynomial Observable Predictions (15'+5') - Ken Mimasu (University of Southampton)  
11:50 Probing H$\tau\tau$ Coupling and CP properties at FCC-ee (15'+5') - Sofia Giappichini (KIT - Karlsruhe Institute of Technology)  
12:10 ATLAS+CMS Outlook talk (20'+10') [remote] - Brendon Bullard (SLAC)  
09:00
WG1 parallel session - Alexander Karlberg (University of Oxford) (until 10:30)
09:00 All-hadronic VH measurements from ATLAS and CMS (15'+3') [remote] - Zhi Zheng (SLAC)  
09:18 Charge asymmetry measurement in WH(->tautau) at CMS (15'+3') - Nicolò Trevisani (KIT)  
09:36 Measurement of ttH(->multilepton) production at ATLAS (15'+3') - Nihal Brahimi (CNRS/IN2P3 LAPP)  
09:54 ttH cross-section at NNLO+NNLL (15'+3') [remote] - Anna Kulesza (ITP Muenster)  
09:00
WG2 parallel session - Lorenzo Rossini (University of Freiburg) (until 10:30)
09:00 EFT Theory Uncertainties at the LHC (25'+5') - Francesco Montagno (IFAE Barcelona)  
09:30 Bridging theory and experiment in the search for CP violating Higgs interactions: Parametrizations and dictionary (25'+5') - Marta Fuentes Zamoro (UA Madrid)  
10:00 Could electron-top interactions spoil the measurement of the Higgs trilinear? A quantitative estimate at future lepton colliders (25'+5') - Lucine Tabatt (Humboldt U. Berlin)  
09:00
WG3 parallel session - Rui Santos (ISEL and CFTC-UL) (until 10:30)
09:00 Using machine learning to predict large pseudoscalar H125 couplings to fermions (12'+3') - Rafael Boto (Instituto Superior Técnico)  
09:15 A smoking gun signature of 3HDM (12'+3') [remote] - Atri Dey (DIAS)  
09:30 LHC Signatures of a Vector-Like Top Partner and Charged Higgs Boson in the 2HDM-II (12'+3') - Mohammed Boukidi (IFJ PAN)  
09:45 Search for an invisible scalar in $t\bar{t}$ final states at the LHC (12'+3') - Rodrigo Capucha (Centro de Física Teórica e Computacional, FCUL)  
10:00 Distinguishing $A\to HZ$ and $H\to AZ$ with top-quark spin correlations (12'+3') - Francisco Arco (DESY)  
10:15 Charged Higgs Pairs at the LHC: A NLO Analysis (12'+3') - Michael Spira (Paul Scherrer Institute)  
09:00
WG4 parallel session - Fabio Monti (CERN) (until 10:30)
09:00 The structure of quark mass corrections in the gg→HH amplitude at high-energy (15'+5') - Sebastian Eryk Jaskiewicz (University of Bern)  
09:20 New HH BSM benchmarks (15'+5') - Milada Margarete Mühlleitner (KIT)  
09:40 ATLAS+CMS HHH recent results (15'+5') - Marko Stamenkovic (Brown University)  
10:00 Direct probes of the quartic Higgs self-coupling (15'+5') - Gilberto Tetlalmatzi-Xolocotzi (Siegen University)  
10:30 --- Coffee break ---
11:00
WG1 parallel session - Silvia Ferrario Ravasio (Università degli Studi di Torino) (until 12:30)
11:00 Scattering amplitudes for 3-loop Higgs+Jet production (15'+3') - Xiang Chen (University of Zurich)  
11:18 Interference effects in gluon-fusion Higgs boson production (15'+3') [remote] - Federica Devoto (SLAC)  
11:36 Higgs off-shell measurements at CMS using Run 2 data (15'+3') - Pedro Fernandez Manteca (CERN)  
11:54 Gluon fusion background for VBF (15'+3') [remote] - Christian Preuss (University of Goettingen)  
12:12 Including QED effects in global PDF’s (15'+3') [remote] - Timothy J Hobbs (Argonne National Laboratory)  
11:00
WG2 parallel session - Daniel Winterbottom (Imperial College) (until 12:30)
11:00 VHbb CP analysis (19'+3') [remote] - Ricardo Barrué (Marietta Blau Institute for Particle Physics, Vienna)  
11:22 Search for anomalous HVV coupling in the gamma gamma final state (19'+3') - Federica De Riggi (Sapienza Università & INFN, Roma1)  
11:44 Higgs-top coupling measurements from ATLAS and CMS (19'+3’) [remote] - Valentina 🐧 Vecchio (University of Manchester)  
12:06 Higgs to charm coupling (19'+3') - Ming-Yan Lee (Rheinisch Westfaelische Tech. Hoch.)  
11:00
WG3 parallel session - Rui Santos (ISEL and CFTC-UL) (until 12:30)
11:00 LHC Constraints on Vector-like Quarks within the Two-Higgs-Doublet Model Framework (12'+3') [remote] - Khawla Salime (Cadi Ayyad University, Marrakech)  
11:15 Strong First-Order Phase Transitions and Exotic Intermediate Phases in the CP-Conserving 2HDM (12'+3') - Christoph Borschensky (Karlsruhe Institute of Technology)  
11:30 Electroweak Baryogenesis with BARYONET: Theory and Applications (12'+3') - Giulio Barni (IFT Madrid)  
11:45 V-associated production & vector boson fusion of Higgs bosons as an LHC signature of CP violation (12'+3') - Alvaro Lozano Onrubia (IFT UAM-CSIC)  
12:00 Probing Strong First-Order Electroweak Phase Transition scenarios in 2HDM with FCC-ee/CEPC (12'+3') - Anisha . (Karlsruhe Institute of Technology)  
11:00
WG4 parallel session - Fabio Monti (CERN) (until 12:30)
11:00 Public ggxy library (12'+3') - Kay Schonwald (U. of Zürich)  
11:15 Higgs-Pair Production via Gluon Fusion: Top-Yukawa- and light-quark-induced electroweak Corrections (12'+3') - Sauro Carlotti (Karlsruher Institut für Technologie - ITP)  
11:30 Electroweak corrections to Higgs boson pair production: The light quark case (12'+3') - Philipp Rendler (Institute for Theoretical Physics, KIT)  
11:45 SMEFT and HEFT di-Higgs Event-Level Reweighting (12'+3') - Matheus Pereira Coelho (Center for Natural and Human Sciences, Federal University of ABC - UFABC)  
12:00 Higgs pair production via gluon fusion to higher orders in HEFT (12'+3') - Konstantin Schmid (University and INFN Padova)  
12:15 NMSSMScanner - Performing intelligent scans in the NMSSM parameter space (12'+3') - Martin Gabelmann (U. Freiburg)  
09:00
Plenary (WG1) - Stephen Jones (IPPP Durham) (until 10:30) (503/1-001 - Council Chamber)
09:00 ttH (17'+5') - Sebastian Wuchterl (CERN)  
09:22 Off-shell (17'+5') - Raoul Horst Rontsch (University of Milan and INFN, Milan)  
09:44 Report 5 cross-section summary (15'+15') - Alexander Karlberg (University of Oxford)  
10:30 --- Coffee break ---
11:00
Cross-topic plenary - Eleni Vryonidou (University of Cyprus) (until 12:45) (503/1-001 - Council Chamber)
11:00 Updates from PDF global fits (20'+10') [remote] - Robert Samuel Thorne (University College London)  
11:30 Path for deriving uncertainties for STXS 1.3 (10'+15') [remote] - Sarah Heim (Deutsches Elektronen-Synchrotron)  
11:55 H+HF/Hbb across WG3 and WG4 (15'+5') - Stefano Manzoni (CERN) Elena Mazzeo (CERN)  
12:15 Higgs physics at Future Colliders (20'+10') - Andrea Sciandra (Brookhaven National Laboratory)  
PM
12:40 --- Lunch break ---
14:00
Plenary (WG1) - Alexander Karlberg (University of Oxford) (until 15:31) (503/1-001 - Council Chamber)
14:00 WG1 - Introduction - Alexander Karlberg (University of Oxford) Hannah Arnold (Stony Brook University) Alessandro Calandri (Università & INFN, Firenze) Bernhard Mistlberger (SLAC)  
14:05 ggF (17'+5') - Stephen Jones (IPPP Durham)  
14:27 VBF (17'+5') - Silvia Ferrario Ravasio (Università degli Studi di Torino)  
14:49 VH (17'+5') [remote] - Suman Chatterjee (DESY)  
15:11 Search for H -> bb and H -> cc at LHCb and future prospects (15'+5') [remote] - Qundong Han (Università & INFN, Padova)  
15:30 --- Coffee break ---
16:00
Plenary (WG3) - Tatjana Lenz (University of Bonn) (until 17:30) (503/1-001 - Council Chamber)
16:00 bbH subgroup report: Modelling bbH production for the LHC at 13.6 TeV - Christian Biello (ETH Zurich)  
16:30 Report from the Extended Higgs Sector (theory+experiment) - Nikolaos Rompotis (University of Liverpool) Thomas Biekoetter (IFT Madrid)  
17:00 Report from the NMSSM subgroup - Milada Margarete Mühlleitner (KIT)  
12:30 --- Lunch break ---
14:00
Plenary (WG2) - Jelena Jovicevic (Institute of Physics, University of Belgrade) (until 15:30) (503/1-001 - Council Chamber)
14:00 CP violation in the Higgs sector: Run 3 and beyond (19'+3') - Henning Bahl (ITP Heidelberg)  
14:22 Higgs decays in the SMEFT at NLO (19'+3') - Matthew Forslund (Princeton Center for Theoretical Science)  
14:44 SMEFT, Anomalous Couplings and CPV from CMS and ATLAS (19'+3') - Daniel Winterbottom (Imperial College)  
15:05 Summary from the Higgs coupling measurements (Run 2 summary and available results from Run 3) from ATLAS and CMS (19'+3') - Serhat Ordek (Deutsches Elektronen-Synchrotron)  
15:30 --- Coffee break ---
16:00
Plenary (WG4) - Arantxa Ruiz Martinez (Univ. of Valencia and CSIC) (until 17:30) (503/1-001 - Council Chamber)
16:00 ATLAS HH experimental overview (20'+5') - Valentina Cairo (CERN)  
16:25 CMS HH experimental overview (20'+5') - Jin Wang (Chinese Academy of Sciences)  
16:50 Summary of the HHH workshop in Dubrovnik (12'+3') - Greg Landsberg (Brown University)  
17:10 NNLO+PS HH production with top-quark mass corrections in GENEVA (12'+3') - Giulia Marinelli (DESY)  
19:30
Workshop dinner (until 22:30)
12:45 --- Lunch break ---
14:00
Lightning session for LHCHWG Report 5 - Liza Brost (Brookhaven National Laboratory) (until 15:30)
14:00 [WG1] ttH NNLO+PS (7'+3') - Christian Biello (ETH Zurich)  
14:10 [WG1] Two-loop QCD corrections to ZH and off-shell Z boson pair production in gluon fusion (7'+3') - Dominik Grau (KIT)  
14:20 [WG1] gg→ZH : updated predictions at NLO QCD including SMEFT contributions (7'+3') - Gudrun Heinrich (KIT) Benjamin Campillo Aveleira (KIT)  
14:30 [WG1] H+c/H+b associated production (7'+3') - Tiziano Bevilacqua (University of Zürich)  
14:40 [WG2] CPV benchmarks (7'+3') - Rui Santos (ISEL and CFTC-UL)  
14:50 [WG3] Charged Higgs Pairs at the LHC: A NLO Analysis (7'+3') - Lisa Biermann (PSI)  
15:00 [WG4] BSM benchmarks and interference effects (7'+3') [remote] - Kateryna Radchenko Serdula (DESY)  
15:10 [WG4] ggF HH QCD and EW higher-order corrections and theory uncertainties (7'+3') - Marco Bonetti (Eberhard Karls Universität Tübingen)  
15:30 --- Coffee break ---
16:00
Summary and closeout - Gaetano Barone (Brown University) (until 17:30) (503/1-001 - Council Chamber)
16:00 WG1 Higgs XS&BR: Outlook and Plans (10'+5') [remote] - Alessandro Calandri (Università & INFN, Firenze)  
16:15 WG2 Higgs Properties: Outlook and Plans (10'+5') - Jelena Jovicevic (Institute of Physics, University of Belgrade)  
16:30 WG3 BSM Higgs: Outlook and Plans (10'+5') - Rui Santos (ISEL and CFTC-UL)  
16:45 WG4 HH and multi-Higgs: Outlook and Plans (10'+5') - Arantxa Ruiz Martinez (Univ. of Valencia and CSIC)  
17:00 Closing words from the Steering Committee (10'+5') - Gaetano Barone (Brown University)