Higgs Hunting 2022

12 sept. 2022, 08:25 → 14 sept. 2022, 18:15 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.

Almost 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 12th workshop of the « Higgs Hunting » series organized on September 12-14th, 2022 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.

Current plans are for the workshop to be held in person once again, to bring back 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: September 5th, 2022

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From_Orsay_and_Bures_IJCLab_com_2022.pdf

Monday Sept 12th Zoom room

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Tuesday Sept 13th Zoom room

Wednesday Sept 14th Zoom room

lundi 12 septembre

08:30 Registration (with coffee and croissants)

1 Prelude by the organizers

All recordings

HH2022-Welcome.pdf

Plenary: Theory overview

Président de session: Paris Sphicas (CERN/University of Athens)

2 Theory of Higgs and di-Higgs production

Orateur: Michael Spira (Paul Scherrer Institut (PSI))

Recording

spira.pdf

Plenary: H(125) bosonic and fermionic decays

Président de session: Paris Sphicas (CERN & University of Athens)

3 H(125) bosonic decays in the ATLAS experiment

Orateur: Ruggero Turra (INFN Milano)

Higgs2Boson.pdf

Recording

4 H(125) bosonic decays — CMS

Orateur: Toni Sculac (University of Split)

HH2022_HiggsBosonicDecays_SculacToni.pdf

Recording

5 H(125) fermionic decays in the ATLAS experiment

Orateur: Giuseppe Callea (University of Glasgow)

HiggsHunting22-GC-final2.pdf

Recording

6 H(125) fermionic decays — CMS

Orateur: Christina Reissel (ETH Zürich)

HH_Reissel_HiggsToFermions_final.pdf

Recording

7 H(125) bosonic and fermionic decays: 3 transparencies of comparison

Recording

ΗΗ2022-BosonicFermionic-Decays-ThreeSildes.pdf

8 Discussion

12:30 Lunch

9 Prelude by the organizers

All recordings

Young scientist forum: Part 1

Président de session: Robert Cousins (University of California at Los Angeles (UCLA))

10 Measurement of the Higgs boson mass in the H→ZZ→4l channel in ATLAS with the full Run 2 dataset

Orateur: Siyuan Yan (University of Oxford)

higgsMass_syan.pdf

Recording

11 Overview of the ttW process and its measurements by the ATLAS experiment.

Orateur: Brendon Bullard (SLAC)

HiggsHunting_YSF_BBullard.pdf

Recording

12 Mixed QCD-EW corrections in Higgs boson production

Orateur: Marco Bonetti (RWTH Aachen)

BONETTI_HH2022.pdf

Recording

13 Multijet production

Orateur: Chiara Savoini (University of Zurich)

Recording

Savoini_talk.pdf

Plenary: H(125) General combination

Président de session: Robert Cousins (University of California at Los Angeles (UCLA))

14 H(125) General combination — CMS

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

FabioMonti_CMSHiggscombination_HiggsHunting_September2022-3.pdf

Recording

15 H(125) General combination in the ATLAS experiment

Orateur: Paolo Francavilla (INFN Pisa)

Higgs Combination in ATLAS_PF.pdf

Recording

16 H(125) General combination : 3 transparencies of comparison

Cousins_Hcomb_discussion_HH22.pdf

Recording

17 Discussion

16:15 Coffee break

Young scientist forum: Part 2

Président de session: Dermot Moran (Center for Energy, Environmental and Technological Research (CIEMAT))

18 Combination of Higgs boson pair production and single Higgs production at the LHC with the ATLAS detector

Orateur: Alkaid Cheng (University of Wisconsin)

HiggsHunting2022_AlkaidCheng_Sep_13_2022.pdf

Recording

19 Top-associated Higgs boson production and the top-to-Higgs fragmentation function

Orateur: Colomba Brancaccio (RWTH Aachen)

HiggsHunting2022.pdf

Recording

20 Differential Higgs boson production

Orateur: Andrea Pelloni (Nikhef)

Pelloni_HH22.pdf

Recording

21 Differential and CP measurements in ttH(H→bb) with ATLAS

Orateur: Neelam Kumari (Centre de Physique des Particules de Marseille (CPPM), IN2P3-CNRS )

higg_hunting_neelam.pdf

Recording

Historical talks: Ten years after the H discovery

Président de session: Dermot Moran (Center for Energy, Environmental and Technological Research (CIEMAT))

All recordings

22 The Genesis of ATLAS - The long journey to the Higgs boson discovery

Orateur: Peter Jenni (CERN and University of Freiburg)

HiggsHunting.ATLAS.history.IJCLab.12Sep2022.pdf

Recording

23 The Higgs boson Turns 10: CMS’ Journey

Orateur: Tejinder Virdee (Imperial College)

Higgs Hunting tsv F.pdf

Recording

19:10 Welcome drink

mardi 13 septembre

09:20 Coffee

24 Prelude by the organizers

All recordings

Young scientist forum: Part 3

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

25 SM and BSM Higgs searches at LHCb

Orateur: Laura Buonincontri (University of Padova)

Recording

SM and BSM Higgs searches at LHCb_LBuonincontri.pdf

26 Search for non-resonant Higgs boson pair production in the final state with two bottom quarks and two tau leptons with CMS

In this talk the most recent results concerning the non-resonant Higgs boson pairs (HH) production in the final state with two tau leptons and two bottom quarks will be presented. The bbtautau channel represent a good compromise between a sizeable branching fraction (7.3%) and a very good purity of the tau pair selection. The HH search and the related 'kappa-modifiers' studies will be presented. The analysis is performed with the full LHC Run2 data. The sensitivity of the search is considerably improved compared to the previously published results with 2016 data due to increased luminosity, improved object identification algorithms, as for example Neural Network based tau lepton identification, and newly introduced machine learning based analysis techniques which allowed to enhance the sensitivity of the search.

Orateur: Valeria D'Amante (University of Pisa and INFN)

HiggsHunting.pdf

Recording

27 Parametrized classifiers for optimal EFT sensitivity (Zoom)

Orateur: Siyu Chen (EPF Lausanne)

ParisTalk.pdf

Recording

28 Search for CP violation in the tau Yukawa coupling with CMS

Recent results from the study of the CP structure of the tau Yukawa coupling shed light on new experimental observables sensitive to CP violation. The talk will review the methods (impact parameter, neutral pion and polarimetric vector methods) and validation techniques employed during Run 2 for the different tau tau final states. The sensitivity of this measurement relies on an efficient hadronic tau identification and a precise separation of their different decay modes. Prospects for Run 3 and HL-LHC will be presented, including kinematic fit techniques to reconstruct the tau lepton momenta.

Orateur: Mario Sessini (CNRS)

higgshunting_HtautauCP_sessini.pdf

Recording

Plenary: BSM and rare H(125) decays - including H→νν and LFV decays

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

29 Additional scalar bosons in the ATLAS experiment (Zoom)

Orateur: Xiaotong Chu (Institute of High Energy Physics, Chinese Academy of Sciences)

Additional Scalar Bosons in the ATLAS Experiment-HiggsHunting2022-Xiaotong_v4.pdf

Recording

30 Additional scalar bosons — CMS

Orateur: Yiwen Wen (DESY)

AdditionalScalar_HiggsHunting_20220913_v6.pdf

Recording

31 BSM and rare H(125) decays in the ATLAS experiment

Orateur: YUAN-TANG Chou (University of Massachusetts Amherst)

higgshunting_2022.pdf

Recording

32 BSM and rare H(125) decays — CMS

Orateur: Maxime GOUZEVITCH (IP2I Lyon)

CMS BSM and rare H(125) talk for HH.pdf

Recording

33 BSM and rare H(125) decays — 3 transparencies of comparison

Recording

sven.pdf

34 Discussion

12:45 Lunch buffet

35 Prelude by the organizers

All recordings

Plenary: CMS joker talk

Président de session: Elizabeth Brost (Brookhaven National Laboratory)

36 The invisible Higgs, newest results of CMS

Orateur: Olivier Davignon (LLR (CNRS/IN2P3 & École Polytechnique))

Davignon_2022_09_13_Higgs_to_invisible_CMS_Higgs_Hunting.pdf

Recording

Plenary: HH

Président de session: Elizabeth Brost (Brookhaven National Laboratory)

37 HH — ATLAS (Zoom)

Orateur: Zhe Yang (USTC & UMICH)

0913_higgs_hunting_yangz-v4.pdf

Recording

38 HH — CMS

Orateur: Marcel Rieger (University of Hamburg)

2022-09-13_hh_cms_rieger.pdf

Recording

39 HH — 3 transparencies of comparison

HHiggs HHunting summary 2022.pdf

Recording

40 Discussion

15:55 Coffee break

41 Prelude by the organizers

All recordings

Young scientist forum: Part 4

Président de session: Anne-Catherine LE BIHAN (IPHC - CNRS)

42 Search for Lorentz boosted nonresonant HH production in the 4b final state with the CMS detector (Zoom)

Double Higgs boson production (HH) allows us to measure the Higgs self-interaction and is uniquely sensitive to the structure of the Higgs potential. This talk will cover the production of HH→4b with highly boosted Higgs bosons in the gluon-fusion (ggF) and VBF production mode with 138 fb^{-1} of data collected with the CMS Experiment at sqrt(s) = 13 TeV [1]. The four-bottom-quark final state has the largest branching ratio (33.9%) amongst all HH decays, but is dominated by large backgrounds (QCD and top) and a poor decay channel resolution. To enhance the signal sensitivity, this analysis uses a dedicated jet identification algorithm developed to identify boosted H$\rightarrow$ bb jets, known as the ParticleNet Tagger. This analysis is very sensitive to anomalous quartic VVHH couplings and, for the first time, we exclude $\kappa_{2V}$ = 0 at >5 $sigma$, when other Higgs couplings are at their SM values. This talk will cover the analysis methods used and show the final sensitivity to different HH couplings ($\kappa_{\lambda}$, $\kappa_{2V}$ and $\kappa_{V}$). I'll also discuss future directions and scope of improvements for measuring the HH process.

Orateur: Irene Dutta (California Institute of Technology (US))

HiggsHunting_IreneDutta_130922_final.pdf

Recording

Plenary: H EFTs and CP violation

Président de session: Anne-Catherine LE BIHAN (IPHC - CNRS)

43 H EFTs — CMS

Orateur: Ram Krishna sharma (Institute of High Energy Physics, Beijing)

Ram_HiggsHunting2022.pdf

Recording

44 Higgs Effective Field Theories results in the ATLAS experiment

Orateur: Alexander Held (New York University)

20220913_Higgs_Hunting_ATLAS_EFT.pdf

Recording

45 CP violation — CMS

Orateur: Andrea Cardini (DESY)

AndreaCardini-HiggsCPnoBackup.pdf

Recording

46 CP violation results in the ATLAS experiment

Orateur: Ricardo Jose Morais Silva Gonçalo (LIP, Lisbon)

HiggsCP_v2.0.pdf

Recording

47 H EFTs and CP violation — 3 transparencies of comparison

HiggsHunting2022_EFT_CPV_Summary.pdf

Recording

48 Discussion

Plenary: New opportunities for electroweak baryogenesis

Président de session: Anne-Catherine LE BIHAN (IPHC - CNRS)

49 New opportunities for electroweak baryogenesis

Orateur: Marcela Carena (Fermilab)

Higgs-Hunting-2022-Carena.pdf

Higgs-Hunting-2022-Carena.pptx

Recording

19:10 Dinner

Workshop dinner at "Tour Zamansky"

mercredi 14 septembre

09:20 Coffee

50 Prelude by the organizers

All recordings

Plenary: ATLAS joker talk

Président de session: Marco Zito

51 Searches for lepton-flavour-violating decays of the Higgs boson into e𝛕 and μ𝛕 in ATLAS (Zoom)

Orateur: Antonio De Maria (Nanjing University (CN))

Recording

Slides_HiggsHunting_2022_ADM.pdf

Plenary: Future colliders

Président de session: Marco Zito (LPNHE Paris)

52 Recent theory progress from and after the European Strategy Update

Orateur: Gauthier Durieux (CERN)

durieux-higgshunting-14sept2022.pdf

Recording

53 Physics at Future Colliders: overview & recent developments

Orateur: Emmanuel Perez (CERN)

2022_09_14_HiggsHunting.pdf

Recording

54 Roadmap for a first strategy for Latin American physics (Zoom)

Orateur: Maria Teresa Dova (National University of La Plata)

HH2022-TereDova.pdf

Recording

55 Highlights from the Snowmass Summer meeting

Orateur: Meenakshi Narain (Brown University)

Narain-Higgs-Hunting-Sep2022.pdf

Recording

56 The Detector and Accelerator R&D roadmaps to future colliders

Orateur: Karl Jakobs (Albert-Ludwigs-Universität Freiburg)

Recording

Roadmaps_Higgs_Hunting_2022.09.14.pdf

57 Discussion

Recording

13:15 Lunch buffet

58 Prelude by the organizers

All recordings

Young scientist forum: Part 5

Président de session: Michael Duehrssen-Debling (CERN)

59 HH production at the High-Luminosity LHC with CMS

The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb-1. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (“pileup”) superimposed to each event of interest, therefore providing extremely challenging experimental conditions. CMS prospects on Higgs self-coupling measurements and HH production at the HL-LHC are presented.

Orateur: Izzeddin Suat Donertas (Univ. Catholique de Louvain)

Higgs_Hunting.pdf

Recording

Plenary: New Physics implications of precise H couplings measurements

Président de session: Michael Duehrssen-Debling (CERN)

60 New Physics implications of precise H couplings measurements

Orateur: Carlos Wagner (University of Chicago)

HiggsHunting22-Wagner.pdf

Recording

Plenary: Concluding talks

Président de session: Michael Duehrssen-Debling (CERN)

61 Theory concluding talk

Orateur: Fabio Maltoni (UCLouvain/Unibo)

HiHu-maltoni.pdf

Recording

62 Experimental concluding talk

Orateur: Giacinto Piacquadio (Stony Brook University)

HiggsHunting2022ExperimentalHighlights2.pdf

Recording

17:15 Farewell coffee