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Higgs Hunting 2025

Europe/Paris
100/-1-A900 - Auditorium Joliot Curie (IJCLab)

100/-1-A900 - Auditorium Joliot Curie

IJCLab

IJCLab Orsay (Tuesday) & APC Paris (Wednesday & Thursday)
140
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Description

Conferecne poster HDThe 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 15th workshop of the « Higgs Hunting » series organized on July 15-17 2025 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 a first look at 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.

 

Mary K. GaillardMary K. Gaillard passed away on 23 May 2025. A major figure in particle theory, she made fundamental contributions to the establishment of the Standard Model. Notably, she achieved a successful determination of the charm quark mass from kaon decays; predicted three-jet events in e+ e- collisions, providing crucial evidence for the existence of gluons; and forecasted the bottom quark mass within the framework of unified theories. She also pioneered systematic studies of Higgs boson production and decay at particle colliders, sketching its first phenomenological profile that launched its experimental hunt. Beyond the Standard Model, Mary K. made numerous and invaluable contributions to Grand Unified Theories and supersymmetric theories, including work on proton decay, supersymmetry breaking, and effective supergravity theories derived from superstrings. The Higgs Hunting workshop was honored to welcome her in 2016 as the speaker for its traditional historical talk
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Mary K. spent a substantial portion of her career in France and at CERN, from her doctoral studies in Orsay to the creation of the theoretical physics laboratory LAPTh in Annecy. The Higgs Hunting workshop extends its deepest condolences to her colleagues at the University of California, Berkeley, and to her family.

 

HH2025 tutelles Labos

HTDS

 

Registration deadline: June 23, 2025

 

 

Valérie Brouillard et Emilie Bonnardel
Inscription
Registration
Participants
    • 09:00 10:00
      Registration (with coffee and croissants) 1h 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

      IJCLab Orsay (Tuesday) & APC Paris (Wednesday & Thursday)
      140
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    • 10:00 10:45
      Plenary: Theory overview 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      Président de session: Nick Wardle (Imperial College)
      • 10:00
        Theory overview 45m
        Orateur: Thomas Gehrmann (Universität Zurich)
    • 10:45 12:30
      Plenary: Higgs boson properties and couplings 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      Président de session: Nick Wardle (Imperial College)
      • 10:45
        Higgs boson property measurements (mass, width, CP) - CMS 15m
        Orateur: Amrutha Krishna (Northeastern University)
      • 11:00
        Higgs boson property measurements (mass, width, CP) - ATLAS 15m
        Orateur: Elise Le Boulicaut (Yale University)
      • 11:15
        Higgs boson coupling measurements - CMS 15m
        Orateur: Walaa Elmetenawee (Universita e INFN, Bari)
      • 11:30
        Higgs boson coupling measurements - ATLAS 15m
        Orateur: Fábio Lucio Alves (Nanjing University)
      • 11:45
        Higgs boson properties and couplings - 3-slide overview 5m
      • 11:50
        Discussion of present status and prospects for coupling and property measurements 40m
    • 12:30 14:00
      Lunch 1h 30m Bures cafeteria (Orsay)

      Bures cafeteria

      Orsay

    • 14:00 14:52
      Topical talks: Part 1 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      • 14:00
        Measurements of the Higgs boson mass and width in CMS 12m
        Orateur: Neha Rawal (University of Florida)
      • 14:12
        Constraining the Higgs boson width from Higgs-top Yukawa coupling at the ATLAS experiment 12m
        Orateur: Yangfan Zhang (University of Science and Technology of China)
      • 14:24
        First VBF H(cc) measurement at the ATLAS experiment 12m
        Orateur: Greta Brianti (Università di Trento)
      • 14:36
        Search for H→cc at the CMS experiment 12m
        Orateur: Angela Zaza (Univ. di Bari e Sez. dell'INFN)
        Abstract Probing the Higgs boson coupling to second generation quarks, still out of reach, is currently one of the most challenging goals of the CMS and ATLAS collaborations. The CMS collaboration carried out searches for the Higgs boson decay in a charm quark-antiquark pair with data collected during the Run-2 of the LHC (2016-2018), by exploring the Higgs boson associated production with a vector boson (VH) , the gluon fusion (ggF) and the associated production with a top quark-antiquark pair (ttH) production mechanisms. By combining the ttH and VH production mechanisms, CMS set the most stringent constraint to date on the Hcc Yukawa coupling modifier: |kc| < 3.5 (2.7). An overview on the searches for H→cc carried out by the CMS collaboration will be presented in this contribution.
    • 14:55 15:25
      Plenary: The Higgs boson self-coupling and the electroweak phase transition 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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    • 15:25 16:30
      Plenary: Higgs boson self-coupling and Di-Higgs production 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      • 15:25
        Higgs boson self-coupling and Di-Higgs production - ATLAS 15m
        Orateur: Lorenzo Santi (CERN)
      • 15:40
        Higgs boson self-coupling and Di-Higgs production - CMS 15m
        Orateur: Leonidas Paizanos (University of Cyprus)
      • 15:55
        Higgs boson self-coupling and Di-Higgs production: 3-slide overview 5m
      • 16:00
        Discussion of Higgs boson self-coupling and Di-Higgs production 30m
    • 16:30 17:00
      Coffee break 30m 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

      IJCLab Orsay (Tuesday) & APC Paris (Wednesday & Thursday)
      140
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    • 17:00 17:30
      Plenary: Parton distribution functions 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      Président de session: Ben Kilminster (Universität Zürich)
      • 17:00
        PDFs for Higgs boson processes at the LHC 30m
        Orateur: Juan Rojo (Vrije Universiteit Amsterdam)
    • 17:30 18:10
      Topical talks: Part 2 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

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      Président de session: Ben Kilminster (Universität Zürich)
      • 17:30
        Model-independent differential measurement in H→WW at the CMS experiment 12m
        Orateur: Benedetta Camaiani (Univ. di Firenze e Sez. dell'INFN)
      • 17:42
        Naturalness, near-criticality and future colliders 12m
        Orateur: Victor Enguita-Vileta (IFT Madrid)
      • 17:54
        An Isotropic Prescription for Constructing the SMEFT in Normal Coordinates to Simplify Amplitude Computations 15m
        Orateur: Mia West (University of Florida)
    • 18:10 19:00
      Historical talk 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

      IJCLab Orsay (Tuesday) & APC Paris (Wednesday & Thursday)
      140
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      Président de session: Ben Kilminster (Universität Zürich)
      • 18:10
        Mysterious Neutrinos 50m
        Orateur: Pierre Ramond (University of Florida)
    • 19:00 20:30
      Welcome cocktail 1h 30m 100/-1-A900 - Auditorium Joliot Curie

      100/-1-A900 - Auditorium Joliot Curie

      IJCLab

      IJCLab Orsay (Tuesday) & APC Paris (Wednesday & Thursday)
      140
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    • 09:25 10:00
      Coffee 35m LPNHE Paris

      LPNHE Paris

    • 10:00 10:25
      Plenary: CMS Joker talk Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Sven Heinemeyer (IFT/IFCA (CSIC))
      • 10:00
        CMS Joker talk 25m
    • 10:25 12:10
      Plenary: BSM H(125) aspects and searches for new scalar bosons Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Sven Heinemeyer (IFT/IFCA (CSIC))
      • 10:45
        BSM H(125) aspects and searches for new scalar bosons - CMS 20m
        Orateur: Siddhesh Gopichand Sawant (Baylor University)
      • 11:05
        BSM H(125) aspects and searches for new scalar bosons - ATLAS 20m
        Orateur: Eleni Skorda (University of Birmingham)
      • 11:25
        BSM H(125) aspects and searches for new scalar bosons: 3-slide overview 5m
      • 11:30
        Discussion of BSM H(125) aspects and searches for new scalar bosons 40m
    • 12:10 13:20
      Lunch buffet 1h 10m LPNHE Paris

      LPNHE Paris

    • 13:20 14:05
      Plenary: Analysis methods Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      • 13:20
        Analysis methods - CMS 15m
        Orateur: Maria Mazza (Florida State University)
      • 13:35
        Analysis methods - ATLAS 15m
        Orateur: Andrea Sciandra (Brookhaven National Laboratory)
      • 13:50
        Discussion of analysis methods 15m
    • 14:05 15:00
      Topical talks: Part 3 Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      • 14:05
        TBA 12m
        Orateur: Wanda Isnard (IP2I Lyon)
      • 14:17
        Search for Higgs boson decays into a pair of pseudoscalar particles in the yytautau final state using pp collisions at \sqrt{s} = 13 TeV with the ATLAS detector 12m
        Orateur: Gadi Ninio (Tel Aviv University)
      • 14:29
        Search for CP violating effects in HWW vertex in WH production channel in 13 TeV pp collisions with the ATLAS detector 12m
        Orateur: Ricardo Barrue (LIP Lisboa)
      • 14:41
        Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV in the diphoton final state in proton-proton collisions with CMS at √s=13 and 13.6 TeV 12m
        Orateur: Benjamin Massoteau (IPN, IN2P3-CNRS, UCB Lyon 1)
    • 15:00 15:30
      Plenary: VBS Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      • 15:00
        Vector boson scattering and the Higgs boson 30m
        Orateur: Mathieu Pellen (Universität Freiburg)
    • 15:30 16:00
      Coffee break 30m LPNHE Paris

      LPNHE Paris

    • 16:00 17:20
      Plenary: Effective field theories Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)
      • 16:00
        Effective field theories - theory overview 20m
        Orateur: José Santiago (University of Granada)
      • 16:20
        Effective field theories - ATLAS 15m
        Orateur: Elena Mazzeo (CERN)
      • 16:35
        Effective field theories - CMS 15m
        Orateur: Suman Chatterjee (DESY)
      • 16:50
        Effective field theories: 3-slide overview 5m
      • 16:55
        Discussion of EFT interpretations 25m
    • 17:20 18:10
      Topical talks: Part 4 Amphithéâtre Charpak (APC Paris)

      Amphithéâtre Charpak

      APC Paris

      Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)
      • 17:20
        Bootstrapping the EFTs 15m
        Orateur: Ziyu Dong (IFAE Barcelona)
      • 17:35
        Deconstructing the Composite Higgs 12m
        Orateur: Marko Pesut (Universität Zürich)
      • 17:47
        The Higgs meets the SMEFT at higher orders 15m
        Orateur: Stefano Di Noi (Karlsruhe Institute of Technology)
    • 18:10 19:00
      Plenary: Vision talk Amphithéâtre Charpak (LPNHE PAaris)

      Amphithéâtre Charpak

      LPNHE PAaris

      Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)
      • 18:10
        Vision talk: Higgs physics and Early Universe cosmology 35m
        Orateur: Alfredo Urbano (University of Rome La Sapienza)
    • 19:00 21:00
      Dinner 2h "Capitaine Fracasse" river barge

      "Capitaine Fracasse" river barge

      Departure from "Ile aux cygnes" (RER station "Champ de Mars Tour Eiffel", métro station "Bir-Hakeim")
      Boarding at 20:15, departure at 20:45, return at 23:00

    • 09:30 10:00
      Coffee 30m LPNHE Paris

      LPNHE Paris

    • 10:00 10:25
      Plenary: ATLAS Joker talk Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Karl Jakobs (University of Freiburg))
      • 10:00
        ATLAS Joker talk 25m
    • 10:25 12:45
      Plenary: Higgs physics within the European strategy update Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Karl Jakobs (University of Freiburg)
      • 10:25
        Theory overview 25m
      • 10:50
        Accelerators overview 25m
        Orateur: Frank Zimmermann (CERN)
      • 11:15
        Overview of the ESPPU strategy for Higgs and Electroweak physics and introduction to the discussion 20m
        Orateur: Gregorio BERNARDI (APC-Paris CNRS/IN2P3)
      • 11:35
        Discussion 1h 10m
    • 12:45 14:15
      Lunch buffet 1h 30m LPNHE Paris

      LPNHE Paris

    • 14:15 14:45
      Plenary: Toponium Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Florencia Canelli (Universität Zürich)
      • 14:15
        Toponium formation at the Large Hadron Collider 30m
        Orateur: Benjamin Fuks (LPTHE Paris)
    • 14:45 15:20
      Topical talks: Part 5 Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Florencia Canelli (Universität Zürich)
    • 15:20 16:50
      Plenary: Concluding talks Amphithéâtre Charpak (LPNHE Paris)

      Amphithéâtre Charpak

      LPNHE Paris

      Président de session: Florencia Canelli (Universität Zürich)
      • 15:20
        Theory concluding talk 45m
        Orateur: Gavin Salam (University of Oxford)
      • 16:05
        Experimental concluding talk 45m
        Orateur: Maria Cepeda (CIEMAT)
    • 16:50 17:50
      Farewell coffee 1h LPNHE Paris

      LPNHE Paris