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

10:45 → 12:30 Plenary: General combinations (mass, width, CP and couplings)

10:45 Property measurements - CMS

11:00 Property measurements - ATLAS

11:15 Coupling measurements - CMS

11:30 Coupling measurements - ATLAS

11:45 Higgs combinations: 3-slide overview

11:50 Discussion of Higgs combinations and prospects

12:30 → 14:00 Lunch

14:00 → 15:00 Topical talks: Part 1

15:00 → 16:25 Plenary: Higgs self-coupling

15:00 Di-Higgs production and the Higgs self-coupling: Theory Introduction

15:20 Higgs self-coupling - ATLAS

15:35 Higgs self-coupling - CMS

15:50 Di-Higgs and self-coupling: 3-slide overview

15:55 Discussion of Di-Higgs and self-coupling measurements

16:25 → 16:55 Coffee break

16:55 → 17:25 Plenary: The Higgs boson and cosmology

17:25 → 18:05 Topical talks: Part 2

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 → 10:40 Plenary

10:00 <Open slot>

10:40 → 12:25 Plenary: BSM H(125) aspects and searches for new scalar bosons

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

11:00 BSM H(125) aspects and searches for new scalar bosons - CMS

11:20 BSM H(125) aspects and searches for new scalar bosons - ATLAS

11:40 BSM H(125) aspects and searches for new scalar bosons: 3-slide overview

11:45 Discussion of BSM H(125) aspects and searches for new scalar bosons

12:20 → 13:35 Lunch buffet

13:35 → 14:00 Plenary: CMS joker talk

14:00 → 15:00 Topical talks: Part 3

15:00 → 15:30 Plenary: VBS

15:30 → 15:55 Plenary: ATLAS joker talk

15:55 → 16:20 Coffee break

16:20 → 17:40 Plenary: Effective field theories

16:20 Effective field theories - theory overview

16:40 Effective field theories - ATLAS

16:55 Effective field theories - CMS

17:10 Effective field theories: 3-slide overview

17:15 Discussion of EFT interpretations

17:40 → 18:10 Topical talks: Part 4

18:10 → 18:55 Plenary: Vision talk

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 → 10:40 Plenary

10:00 Open slot

10:40 → 13:00 Plenary: Higgs physics within the European strategy update

Président de session: Karl Jakobs (University of Freiburg)

10:40 Theory overview

11:05 Accelerators overview

Orateur: Frank Zimmermann (CERN)

11:30 Overview of the ESPPU strategy for Higgs and Electroweak physics and introduction to the discussion

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

11:50 Discussion

13:00 → 14:30 Lunch buffet

14:30 → 15:20 Topical talks: Part 5

15:20 → 16:50 Plenary: Concluding talks

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