Higgs Hunting 2024

23 sept. 2024, 09:00 → 25 sept. 2024, 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 14th workshop of the « Higgs Hunting » series organized on September 23-25 2024 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.

Zoom link:  https://ijclab.zoom.us/j/94890955802 

Peter Higgs passed away on April 8th 2024. In the 1960s, Peter Higgs, and others, proposed that spontaneous symmetry breaking could provide masses for the mediators of the weak interactions, the W and Z bosons. One major prediction of this idea is the existence of a new particle, now called the Higgs boson, which was finally discovered at CERN in 2012. We now know that the Higgs field is most probably at the origin of the masses of all elementary particles. The three papers written by Peter Higgs between 1964 and 1966 are part of the foundations of the Standard Model and among the most influential ones in particle physics and beyond. The Higgs Hunting workshop, which owes its name to Peter Higgs, expresses its deepest condolences to his family.

Registration deadline: September 17th, 2024

Gustave_Caillebotte_parapluies_HH2024_V8_4K.jpg

Zoom link

lundi 23 septembre

09:00 → 09:55 Registration (with coffee and croissants)

09:55 → 10:00 Prelude by the organizers

10:00 → 10:45 Plenary: Theory overview

Président de session: Giovanni Petrucciani (CERN)

10:00 Higgs production: A theory overview

Orateur: Stephen Jones (IPPP Durham)

10:45 → 12:30 Plenary: General combinations (Mass, width, CP + couplings)

Président de session: Giovanni Petrucciani (CERN)

10:45 Mass, width and CP measurements - ATLAS

Orateur: Valerie Lang (Albert Ludwigs Universitaet Freiburg)

11:00 Mass, width and CP measurements - CMS

Orateur: Fabio Iemmi (Inst. of High Energy Physics)

11:15 Coupling measurements - ATLAS

Orateur: George Iakovidis (Brookhaven National Laboratory)

11:30 Coupling measurements - CMS

Orateur: Tiziano Bevilacqua (PSI)

11:45 Higgs combinations: 3 transparencies of comparison

Orateur: Giovanni Petrucciani (CERN)

11:50 Discussion including prospects for ATLAS+CMS combinations

12:30 → 14:00 Lunch

14:00 → 15:00 Topical talks: Part 1

Président de session: Valentina Cairo (CERN)

14:00 Boosted Higgs decays to b-quarks in ATLAS

Orateur: Marion Miissio (Nikhef National institute for subatomic physics)

14:12 Improvements in the measurement of VBF and ttH production with H->𝛕𝛕 in ATLAS

Orateur: Enrique Valiente Moreno (Univ. of Valencia and CSIC)

14:24 Top-quark pair production and anomalous Higgs interactions

Orateur: Simone Tentori (UCLouvain)

14:36 Diboson production in the SMEFT from gluon fusion

Orateur: Marion Thomas (University of Manchester)

15:00 → 16:25 Plenary: Higgs Self Coupling

Président de session: Valentina Cairo (CERN)

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

Orateur: Ramona Gröber (Università and INFN Padova)

15:20 Higgs Self Coupling - CMS

Orateur: Agni Bethani (Univ. Catholique de Louvain)

15:35 Higgs Self Coupling - ATLAS

Orateur: Zhijun Liang (Chinese Academy of Sciences)

15:50 3 transparencies of comparison

Orateur: Valentina Cairo (CERN)

15:55 Discussion including prospects for ATLAS+CMS combinations

16:25 → 16:55 Coffee break

16:55 → 17:25 Plenary: The Higgs Boson and Cosmology

16:55 The Higgs Boson and Cosmology

17:25 → 18:05 Topical talks: Part 2

17:25 Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons in proton-proton at 13 TeV with the ATLAS detector

Orateur: Maxime Fernoux (CPPM, Aix-Marseille Université, CNRS/IN2P3)

17:37 Searching for Higgs Boson Pairs in the bb𝛕𝛕 Final State with the ATLAS Experiment with Run 2 and beyond

Orateur: Florian Haslbeck (University of Oxford)

17:49 Interference effects in gg → H → Zγ beyond leading order

Orateur: Federico Buccioni (Tech, Univ. Munich)

18:05 → 19:30 Historical talks

18:05 PYTHIA and the Higgs

Orateur: Torbjörn Sjöstrand (Lund University)

18:45 Herwig, QCD and the Higgs boson

Orateur: Bryan Webber (University of Cambridge)

19:30 → 21:00 Welcome drink

mardi 24 septembre

09:20 → 09:55 Coffee

09:55 → 10:00 Prelude by the organizers

10:00 → 12:05 Plenary: BSM and rare H(125) decays

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

10:00 Rare Higgs boson decays: Light Yukawas, FCNC, BSM, and more

Orateur: David d' Enterria (CERN)

10:20 Search for BSM Scalar Bosons at ATLAS

Orateur: Erich Varnes (University of Arizona)

10:35 Additional scalar bosons - CMS

Orateur: Efe Yazgan (National Taiwan University)

10:50 BSM and rare H(125) decays - ATLAS

Orateur: Huacheng Cai (University of Pittsburgh)

11:05 BSM and rare H(125) decays - CMS

Orateur: Chen Zhou (Peking Univ.)

11:20 3 transparencies of comparison

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

11:25 Discussion

12:05 → 13:35 Lunch buffet

13:35 → 14:00 Plenary: CMS joker talk

Président de session: Djamel BOUMEDIENE (LPC CNRS/IN2P3)

14:00 → 15:00 Topical talks: Part 3

Président de session: Djamel BOUMEDIENE (LPC CNRS/IN2P3)

14:00 Mapping the SMEFT one-loop structure of linear Standard Model extensions

Orateur: John Gargalionis (IFIC and University of Valencia)

15:00 → 15:30 Plenary: Up and down the simulation chain with neural networks

Président de session: Djamel BOUMEDIENE (LPC CNRS/IN2P3)

15:00 Up and down the simulation chain with neural networks

Orateur: Anja Butter (LPNHE Paris)

15:30 → 16:00 Plenary: ATLAS joker talk

Président de session: Djamel BOUMEDIENE (LPC CNRS/IN2P3)

16:00 → 16:20 Coffee break

16:20 → 17:40 Plenary: Effective Field Theories

Président de session: Sandra Kortner (Max Planck Society (DE))

16:20 Theory introduction to the SMEFT framework

Orateur: Tevong You (King's College London)

16:40 EFT - ATLAS

Orateur: Yicong Huang (University of Sheffield)

16:55 EFT - CMS

Orateur: Lourdes Urda (LLR, Ecole Polytech., IN2P3-CNRS)

17:10 3 transparencies of comparison

Orateur: Sandra Kortner (Max Planck Society (DE))

17:15 Discussion

17:40 → 18:20 Topical talks: Part 4

Président de session: Sandra Kortner (Max Planck Society (DE))

18:20 → 19:00 Plenary: Vision talk

Président de session: Sandra Kortner (Max Planck Society (DE))

18:20 On-shell visions for Higgs physics

Orateur: Lance Dixon (SLAC)

19:00 → 21:00 Dinner

mercredi 25 septembre

09:25 → 09:55 Coffee

09:55 → 10:00 Prelude by the organisers

10:00 → 13:10 Plenary: Higgs physics at HL-LHC

Président de session: Patricia McBride (Fermilab)

10:00 HL-LHC collider upgrade

Orateur: Oliver Bruning (CERN)

10:30 ATLAS Phase 2 upgrade

10:45 CMS Phase 2 upgrade

Orateur: Federico De Guio (INFN Milano-Bicocca)

11:00 3 transparencies of comparison

Orateur: Patricia McBride (Fermilab)

11:10 Discussion

11:35 Theory prospects for HL-LHC

Orateur: Kats Yevgeny (Ben-Gurion University)

12:05 New analysis methods and physics prospects for HL-LHC - ATLAS

Orateur: Sam Van Stroud (UCL)

12:20 New analysis methods and physics prospects for HL-LHC - CMS

Orateur: Maxime GOUZEVITCH (IP2I Lyon)

12:35 3 transparencies of comparison

Orateur: Patricia McBride (Fermilab)

12:45 Discussion

13:10 → 14:40 Lunch buffet

14:40 → 15:10 Topical talks: Part 5

Président de session: Rosy Nikolaidou (Université Paris-Saclay (FR))

15:10 → 15:40 Plenary: XXX

Président de session: Rosy Nikolaidou (Université Paris-Saclay (FR))

15:40 → 17:10 Plenary: Concluding talks

Président de session: Rosy Nikolaidou (Université Paris-Saclay (FR))

15:40 Theory concluding talk

Orateur: Kirill Melnikov (Karlsruhe Institute of Technology)

16:25 Experimental concluding talk

Orateur: Kerstin Tackmann (DESY)

17:10 → 18:10 Farewell coffee