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 

Robert Aymar passed away on September 23 rd 2024. The Higgs Hunting Community would like to pay tribute to a visionary leader whose impact on high-energy physics has been profound. As CERN's Director-General from 2004 to 2008, he oversaw the final stages of the Large Hadron Collider (LHC) construction, a monumental project that paved the way for the discovery of the higgs boson in 2012. His dedication to advancing science, fostering international collaboration, and pushing the boundaries of human knoledge will continue to inspire generations of physicists. We honor his memory and his contributions to our field and express our deepest condolences to his family.

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.

Ulrich Ellwanger passed away on August 7th 2024. He was emeritus professor at Paris-Saclay , a frequent participant to the Higgs Hunting workshop , and one of the best experts of extensions of the Higgs sector,  in particular the NMSSM. The Higgs Hunting workshop expresses its deepest condolences to his family.

Registration deadline: September 2nd, 2024

 

Gustave_Caillebotte_parapluies_HH2024_V8_4K.jpg

Zoom link

lun. 23 septembre

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

09:55 → 10:00 Prelude by the organizers

Higgs Hunting 2024 Organisers intro.pdf

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)

Recording

sjones_higgshunting.pdf

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)

HiggsMassWidthCP_ATLAS_VLang_HiggsHunting_23092024.pdf

Recording

11:00 Mass, width and CP measurements - CMS

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

HH2024_MassWidthCP.pdf

Recording

11:15 Coupling measurements - ATLAS

Orateur: George Iakovidis (Brookhaven National Laboratory)

2024_09_23_Higgs_Iakovidis.pdf

Recording

11:30 Coupling measurements - CMS

Orateur: Tiziano Bevilacqua (PSI)

Higgs_Couplings_HH_2024_Tiziano_Bevilacqua.pdf

Recording

11:45 Higgs combinations: 3 transparencies of comparison

Orateur: Giovanni Petrucciani (CERN)

3slides.pdf

Recording

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 Interference effects in gg → H → Zγ beyond leading order

Orateur: Federico Buccioni (Tech, Univ. Munich)

buccioni_higgshunting.pdf

Recording

14:15 Higgs boson fiducial XS at √s=13.6 TeV with the CMS detector

Orateur: Nico Harringer (ETH Zürich)

HH24.pdf

14:27 Improvements in the measurement of VBF and ttH production with H->𝛕𝛕 in ATLAS

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

Moreno_HiggsHunting2024.pdf

Recording

14:39 Higgs photoproduction

Orateur: Laboni Manna (Warsaw University of Technology)

higgs_hunting_LM.pdf

Recording

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 Groeber (Università and INFN Padova)

HiggsHunting_ramona.pdf

Recording

15:20 Higgs Self Coupling - CMS

Orateur: Agni Bethani (Univ. Catholique de Louvain)

HiggsHunting2024_Agni.pdf

Recording

15:35 Higgs Self Coupling - ATLAS

Orateur: Zhijun Liang (Chinese Academy of Sciences)

ATLAS-Di-higgsv12.pdf

Recording

15:50 3 transparencies of comparison

Orateur: Valentina Cairo (CERN)

Cairo.pdf

Recording

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

Président de session: Tatsuya Masubuchi (Osaka/Tokyo)

16:55 The Higgs Boson and Cosmology

Orateur: Bibhushan Shakya (DESY)

Bibhushan_HiggsHunting24.pdf

Recording

17:25 → 18:05 Topical talks: Part 2

Président de session: Tatsuya Masubuchi (Osaka/Tokyo)

17:25 Inert Doublet Models

Orateur: Anupam Ghosh (Physical Research Laboratory, Ahmedabad)

Anupam_Ghosh_inert_Higgs.pdf

Recording

17:40 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)

Recording

SearchingForHiggsBosonPairsInTheBBTTFinalState.pdf

17:52 Combination of X->HH/YH searches at CMS with Run2 data

Orateur: Élise Jourd'Huy (IPN, IN2P3-CNRS, UCB Lyon 1)

HH2024_HHHY.pdf

Recording

18:05 → 19:30 Historical talks

Président de session: Tatsuya Masubuchi (Osaka/Tokyo)

18:05 PYTHIA and the Higgs

Orateur: Torbjörn Sjöstrand (Lund University)

higgs24ts.pdf

Recording

18:45 Herwig, QCD and the Higgs boson

Orateur: Bryan Webber (University of Cambridge)

Recording

webber_HH2024.pdf

19:30 → 21:00 Welcome drink

mar. 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)

dde_rare_exclusive_Higgs_decays_sept24-2.pdf

Recording

10:20 Search for BSM Scalar Bosons at ATLAS

Orateur: Erich Varnes (University of Arizona)

Recording

Varnes_talk.pdf

10:35 Additional scalar bosons - CMS (by Zoom)

Orateur: Efe Yazgan (National Taiwan University)

HiggsHunting2024_eyazgan_15m.pdf

Recording

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

Orateur: Huacheng Cai (University of Pittsburgh)

hcai_ATLAS_RareBsmHiggsDecays_v3.pdf

Recording

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

Orateur: Chen Zhou (Peking Univ.)

chenzhou_20240924.pdf

Recording

11:20 3 transparencies of comparison

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

Recording

sven.pdf

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)

13:35 High-precision measurement of the W boson mass at CMS

Orateur: Andrew Gilbert (LLR / CNRS / École Polytechnique (FR))

HH-WMass.pdf

Recording

14:00 → 15:00 Topical talks: Part 3

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

14:00 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)

Recording

X-SH-bbyy-Fernoux-Higgs-Hunting-2024.pdf

14:12 Search for exotic decays of the Higgs Boson to a pair of pseudoscalars at CMS

Orateur: Lakshmi Pramod (DESY)

Htoaa_HH2024.pdf

Recording

14:24 Boosted Higgs decays to b-quarks in ATLAS

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

Missio_BoostedVHbb_HiggsHunting24.pdf

Recording

14:36 Search for pseudoscalars and scalars decaying to top quark pairs with CMS Run 2

Orateurs: Samuel Baxter (DESY), Samuel Baxter (Deutsches Elektronen-Synchrotron (DESY), CMS)

Higgs_Hunting_Samuel_Baxter_v8.pdf

Recording

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)

Higgs_Hunting.pdf

Recording

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

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

15:30 Search for a light CP-odd Higgs boson decaying into a pair of leptonically decaying tau

Orateurs: Manuel Gutsche (Technische Universität Dresden), Manuel Gutsche (TU Dresden)

MGutsche_HiggsHunting2024.pdf

Recording

15:55 → 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)

2024 - 09 - Paris Higgs Hunting - Theory review of the SMEFT.pdf

Recording

16:40 EFT - ATLAS (by Zoom)

Orateur: Yicong Huang (University of Sheffield)

EFT-ATLAS.pdf

Recording

16:55 EFT - CMS

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

HH24_EFTCMS_LOURDESURDA_f.pdf

Recording

17:10 3 transparencies of comparison

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

EFT_comparison.pdf

Recording

17:15 Discussion

17:40 → 18:07 Topical talks: Part 4

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

17:40 Mapping the SMEFT one-loop structure of linear Standard Model extensions

Orateur: John Gargalionis (IFIC and University of Valencia)

gargalionis_higgs_hunting.pdf

Recording

17:55 Top-quark pair production and anomalous Higgs interactions

Orateur: Simone Tentori (UCLouvain)

Recording

Top-quark pair production and anomalous Higgs interactions.pdf

18:10 → 18:51 Plenary: Vision talk

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

18:10 On-shell visions for Higgs physics

Orateur: Lance Dixon (SLAC)

OnShellVisionsHiggs.pdf

OnShellVisionsHiggs.pptx

Recording

18:50 Direction to dinner place

Direction

19:00 → 21:00 Dinner

La Dame de Canton, 5 Port de la Gare, 75013 Paris

mer. 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)

HL-LHC-Higgs-Hunting-V0.pptx

Recording

10:30 ATLAS Phase 2 upgrade

Orateur: Khuram Tariq (Beijing IHEP)

ATL-COM-UPGRADE-2024-013.pdf

Recording

10:45 CMS Phase 2 upgrade

Orateur: Federico De Guio (INFN Milano-Bicocca)

De Guio - CMS Upgrades - HH2024.pdf

Recording

11:00 3 transparencies of comparison

Orateur: Patricia McBride (Fermilab)

Recording

Summary 1.pdf

11:10 Discussion

11:35 Theory prospects for HL-LHC

Orateur: Yevgeny Kats (Ben-Gurion University)

Higgs HL-LHC.pdf

Recording

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

Orateur: Sam Van Stroud (UCL)

hh-hl-lhc-svs.pdf

Recording

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

Orateur: Maxime GOUZEVITCH (IP2I Lyon)

CMS_HLLHC.pdf

Recording

12:35 3 transparencies of comparison

Orateur: Patricia McBride (Fermilab)

Recording

Summary 2.pdf

12:45 Discussion

13:10 → 14:30 Lunch buffet

14:30 → 14:38 Prelude by the organisers

HH 2024 In Memoriam Aymar.pdf

14:38 → 15:20 Topical talks: Part 5

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

14:38 Higgs physics at FCC-ee

Orateur: Louis Portales (CEA)

20240925_HiggsHunting_HiggsAtFCCee_LPortales.pdf

Recording

14:53 Multi-Higgs Production in the BSM: Implications for Electroweak Phase Transitions and Future Collider Prospects

Orateur: Wrishik Naskar (Glasgow)

Recording

wn_hh2024.pdf

15:05 Next-to-Leading Order Unitarity Fits in the (Extended) Georgi-Machacek Model

Orateur: Poulami Mondal (IIT Kanpur)

Recording

talk_Poulami_2509.pdf

15:20 → 16:50 Plenary: Concluding talks

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

15:20 Theory concluding talk

Orateur: Kirill Melnikov (Karlsruhe Institute of Technology)

hhuntingmelnikov.pdf

Recording

16:05 Experimental concluding talk

Orateur: Kerstin Tackmann (DESY)

HiggsHuntingExperimentalSummary.pdf

Recording

16:50 → 17:50 Farewell coffee