Higgs Hunting 2025

15 juil. 2025, 09:00 → 17 juil. 2025, 19:00 Europe/Paris

200/0-Auditorium - Auditorium P. Lehmann (IJCLab)

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 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.

 

Registration deadline: June 23, 2025

 

mar. 15 juillet ¶

09:00 → 10:00 Registration (with coffee and croissants)

10:00 → 10:45 Plenary: Theory overview¶

10:00 Theory overview¶

Orateur: Thomas Gehrmann (Universität Zurich)

10:45 → 12:30 Plenary: Higgs boson properties and couplings¶

10:45 Higgs boson property measurements (mass, width, CP) - CMS¶

Orateur: Amrutha Krishna (Northeastern University)

11:00 Higgs boson property measurements (mass, width, CP) - ATLAS¶

Orateur: Elise Le Boulicaut (Yale University)

11:15 Higgs boson coupling measurements - CMS¶

Orateur: Walaa Elmetenawee (Universita e INFN, Bari)

11:30 Higgs boson coupling measurements - ATLAS¶

Orateur: Fábio Lucio Alves (Nanjing University)

11:45 Higgs boson properties and couplings - 3-slide overview¶

11:50 Discussion of present status and prospects for coupling and property measurements¶

12:30 → 14:00 Lunch

14:00 → 14:45 Topical talks: Part 1¶

14:00 TBD¶

Orateur: Mia West (University of Florida)

14:15 First VBF H(cc) measurement at the ATLAS experiment¶

Orateur: Greta Brianti (Università di Trento)

14:27 Constraining the Higgs boson width from Higgs-top Yukawa coupling at the ATLAS experiment¶

Orateur: Yangfan Zhang (University of Science and Technology of China)

14:45 → 15:15 Plenary: The Higgs boson self-coupling and the electroweak phase transition¶

15:15 → 16:20 Plenary: Higgs boson self-coupling and Di-Higgs production¶

15:15 Higgs boson self-coupling and Di-Higgs production - ATLAS¶

Orateur: Lorenzo Santi (CERN)

15:30 Higgs boson self-coupling and Di-Higgs production - CMS¶

Orateur: Leonidas Paizanos (University of Cyprus)

15:45 Higgs boson self-coupling and Di-Higgs production: 3-slide overview¶

15:50 Discussion of Higgs boson self-coupling and Di-Higgs production¶

16:20 → 16:50 Coffee break

16:50 → 17:20 Plenary: Parton distribution functions¶

16:50 PDFs for Higgs boson processes at the LHC¶

Orateur: Juan Rojo (Vrije Universiteit Amsterdam)

17:20 → 18:05 Topical talks: Part 2¶

17:20 TBA¶

Orateur: Victor Enguita-Vileta (IFT Madrid)

18:05 → 18:55 Historical talk¶

18:05 Mysterious Neutrinos¶

Orateur: Pierre Ramond (University of Florida)

19:00 → 20:30 Welcome cocktail

mer. 16 juillet ¶

09:25 → 10:00 Coffee

10:00 → 10:25 Plenary: CMS Joker talk¶

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

10:00 CMS Joker talk¶

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

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

10:45 BSM H(125) aspects and searches for new scalar bosons - CMS¶

Orateur: Siddhesh Gopichand Sawant (Baylor University)

11:05 BSM H(125) aspects and searches for new scalar bosons - ATLAS¶

Orateur: Eleni Skorda (University of Birmingham)

11:25 BSM H(125) aspects and searches for new scalar bosons: 3-slide overview¶

11:30 Discussion of BSM H(125) aspects and searches for new scalar bosons¶

12:10 → 13:20 Lunch buffet

13:20 → 14:05 Plenary: Analysis methods¶

13:20 Analysis methods - CMS¶

Orateur: Maria Mazza (Florida State University)

13:35 Analysis methods - ATLAS¶

Orateur: Andrea Sciandra (Brookhaven National Laboratory)

13:50 Discussion of analysis methods¶

14:05 → 15:05 Topical talks: Part 3¶

14:05 TBA¶

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¶

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¶

Orateur: Ricardo Barrue (LIP Lisboa)

15:05 → 15:35 Plenary: VBS¶

15:05 Vector boson scattering and the Higgs boson¶

Orateur: Mathieu Pellen (Universität Freiburg)

15:35 → 16:00 Coffee break

16:00 → 17:20 Plenary: Effective field theories¶

Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)

16:00 Effective field theories - theory overview¶

Orateur: José Santiago (University of Granada)

16:20 Effective field theories - ATLAS¶

Orateur: Elena Mazzeo (CERN)

16:35 Effective field theories - CMS¶

Orateur: Suman Chatterjee (DESY)

16:50 Effective field theories: 3-slide overview¶

16:55 Discussion of EFT interpretations¶

17:20 → 18:10 Topical talks: Part 4¶

Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)

17:20 Bootstrapping the EFTs¶

Orateur: Ziyu Dong (IFAE Barcelona)

17:35 TBA¶

Orateur: Marko Pesut (Universität Zürich)

17:47 The Higgs meets the SMEFT at higher orders¶

Orateur: Stefano Di Noi (Karlsruhe Institute of Technology)

18:10 → 19:00 Plenary: Vision talk¶

Président de session: Pamela Ferrari (Radboud University Nijmegen & Nikhef)

18:10 Vision talk: Higgs physics and Early Universe cosmology¶

Orateur: Alfredo Urbano (University of Rome La Sapienza)

19:00 → 21:00 Dinner

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

jeu. 17 juillet ¶

09:30 → 10:00 Coffee

10:00 → 10:25 Plenary: ATLAS Joker talk¶

10:00 ATLAS Joker talk¶

10:25 → 12:45 Plenary: Higgs physics within the European strategy update¶

Président de session: Karl Jakobs (University of Freiburg)

10:25 Theory overview¶

10:50 Accelerators overview¶

Orateur: Frank Zimmermann (CERN)

11:15 Overview of the ESPPU strategy for Higgs and Electroweak physics and introduction to the discussion¶

Orateur: Gregorio BERNARDI (APC-Paris CNRS/IN2P3)

11:35 Discussion¶

12:45 → 14:15 Lunch buffet

14:15 → 14:45 Plenary: Toponium¶

Président de session: Florencia Canelli (Universität Zürich)

14:15 Toponium formation at the Large Hadron Collider¶

Orateur: Benjamin Fuks (LPTHE Paris)

14:45 → 15:20 Topical talks: Part 5¶

Président de session: Florencia Canelli (Universität Zürich)

15:20 → 16:50 Plenary: Concluding talks¶

Président de session: Florencia Canelli (Universität Zürich)

15:20 Theory concluding talk¶

Orateur: Gavin Salam (University of Oxford)

16:05 Experimental concluding talk¶

Orateur: Maria Cepeda (CIEMAT)

16:50 → 17:50 Farewell coffee