Focus on:  Hide Contributions
Back to Conference View
Login

The 19th Workshop of the LHC Higgs Working Group

→ Europe/Zurich
30/7-018 - Kjell Johnsen Auditorium (CERN)

30/7-018 - Kjell Johnsen Auditorium

CERN

190
Show room on map
Description

The aim of the LHC Higgs Working Group (LHCHWG) is to collect and produce theoretical predictions relevant for Higgs physics in the Standard Model and beyond. Summaries of these activities have been made available in four CERN Reports: "Inclusive Observables" (CERN-2011-002), "Differential Distributions" (CERN-2012-002),  "Higgs Properties" (CERN-2013-004) and "Deciphering the nature of the Higgs Sector" (CERN-2017-002).

We plan to hold the meeting in-person at CERN, but a video connection will be available for those who cannot travel to CERN.

If you will request financial assistance, you must register before October 30th and request it in the registration form. 

Zoom connection and Mattermost discussion details will be sent to registered participants ahead of the start of the workshop.

Related events/meetings during the week

LHC Higgs WG Steering Committee
Participants
294 View full list
  • Monday 28 November
    • HH Parallel: Morning 1 40/S2-B01 - Salle Bohr

      40/S2-B01 - Salle Bohr

      CERN

      100
      Show room on map
      Conveners: Nan Lu (University of Science and Technology of China (CN)), Stefano Manzoni (CERN)
      • 1
        New constraints on extended Higgs sectors from the trilinear Higgs coupling (10'+8')

        The trilinear Higgs coupling is a crucial tool to determine the structure of the Higgs potential and to probe possible effects of physics beyond the Standard Model (SM). Focusing on a Two-Higgs-Doublet Model as a concrete example, I will discuss the calculation of the dominant two-loop corrections to the trilinear Higgs coupling, and show that this coupling can be significantly enhanced with respect to its SM prediction, in certain regions of parameter space. Taking into account all relevant corrections up to the two-loop level, I will demonstrate that the current experimental bounds on the trilinear coupling already rule out significant parts of the parameter space that would otherwise be unconstrained. Finally, I will present a benchmark scenario illustrating the interpretation of the current results and future measurement prospects.

        Based on Bahl, Braathen, Weiglein 2202.03453, accepted for publication in Phys. Rev. Lett.

        Speaker: Johannes Braathen (DESY)
        Braathen_LHCHiggsWorkshop2022.pdf
        video1978119001.mp4
      • 2
        Two-loop Yukawa corrections to double Higgs production (10'+8')

        Double Higgs production will be a key observable to probe the structure of the Higgs potential. In this talk I will present the first step in obtaining the electroweak corrections to double Higgs production by considering the leading Yukawa corrections to this process in the high energy limit. I will describe the methods we used and show that we obtain precise numerical results down to $p_T \approx 100 \,$GeV.

        based on JHEP 08 (2022) 259 (arxiv:2207.02587)

        Speaker: Kay Schönwald (University of Zuerich)
        hwg.pdf
        video1978119001.mp4
      • 3
        Triple Higgs production in the SM and in models with singlet NP scalars at proton-proton colliders (10'+8')

        In this talk we will discuss the production of three Higgs bosons in the LHC and at a proton-proton collider running at a centre-of-mass energy of 100 TeV. We will argue that the seemingly challenging 6-botton jets final state is a very good candidate to investigate triple Higgs production within and beyond the SM in proton-proton colliders. In particular we will consider three different scenarios: one in which the triple and quartic Higgs boson self-couplings are not affected by new physics phenomena besides the Standard Model (SM) and in addition, we will explore two possible SM extensions by one and two new scalars. We will show that a 100 TeV machine can impose competitive constraints on the quartic coupling in the SM-like scenario. In the case of the scalar extensions of the SM, we will show that large significances can be obtained in the LHC and the 100 TeV collider while obeying current theoretical and experimental constraints including a first order electroweak phase transition.

        Speaker: Gilberto Tetlalmatzi-Xolocotzi (Siegen University)
        Higgs_Talk_CERN.pdf
        video3978119001.mp4
      • 4
        Invariant mass distribution of di-Higgs production at HL-LHC in the 2HDM (10'+8')

        The dominant Higgs pair production process in the HL-LHC is gluon fusion, which we study in the framework of the Two Higgs Doublet Model. As a key observable we evaluate the invariant mass distribution of two Higgses at 125 GeV in the final state. We analyze in particular the contribution of the resonant diagram involving a heavy CP-even Higgs boson exchange. We analyze the potential sensitivity to the triple Higgs couplings involved. We show that for the benchmark points where the resonant production is dominant, the contribution of different parameters of the extra scalar can be traced. These parameters are its mass, total decay width and relative sign of BSM Higgs trilinear and top Yukawa couplings. Finally, we discuss the effects of experimental uncertainties by applying smearing and binning to the invariant mass.

        Speaker: Kateryna Radchenko Serdula (DESY)
        Radchenko_LHC_WG_22.pdf
        video2978119001.mp4
      • 5
        Search for the Higgs boson pair production in the bbμ+μ− final state at the LHC (10'+8')

        The Higgs boson pair production via gluon-gluon fusion and vector boson fusion in the bbμ+μ− final state at the LHC is studied to probe the Higgs self-coupling κλ and the four-boson HHVV coupling κ2V for the first time. A cut-based analysis and a machine learning analysis using boosted decision trees are performed with categorizations and optimizations depending on the variations of these couplings. The expected sensitivities are extracted with different luminosities assumed up to the full HL-LHC runs. The expected upper limit at 95% confidence level on the HH production is calculated as 47 (28) times the Standard Model cross-section using the cut-based method (boosted decision trees) for the gluon-gluon fusion production, and 928 for the vector boson fusion production, assuming an integrated luminosity of 3000 fb−1. The expected constraints on the couplings at 95% confidence level are calculated to be −13.8 < κλ < 19.1 (−10.0 < κλ < 15.5) and −3.4 < κ2V < 5.5 using the cut-based method (boosted decision trees), respectively, assuming an integrated luminosity of 3000 fb−1.

        https://arxiv.org/abs/2207.10912

        Speaker: Botao Guo (Peking University (CN))
        LHC_HWG2022_HHbbmm_BotaoGuo.pdf
        video4978119001.mp4
    • WG1 Higgs XS&BR parallel: Morning 1 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Dr Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
    • WG2 Higgs Properties Parallel: Morning 1 500/1-001 - Main Auditorium

      500/1-001 - Main Auditorium

      CERN

      400
      Show room on map
      Conveners: Mauro Donega (ETH Zurich (CH)), Nicolas Berger (Centre National de la Recherche Scientifique (FR))
      zoom link
    • WG3 BSM Higgs Parallel: Morning 1 40/S2-A01 - Salle Anderson

      40/S2-A01 - Salle Anderson

      CERN

      100
      Show room on map
      Conveners: Abdollah Mohammadi (University of Wisconsin Madison (US)), Jana Schaarschmidt (University of Washington (US))
    • 10:30
      Morning coffee
    • HH Parallel: Morning 2 40/S2-B01 - Salle Bohr

      40/S2-B01 - Salle Bohr

      CERN

      100
      Show room on map
      Conveners: Nan Lu (University of Science and Technology of China (CN)), Stefano Manzoni (CERN)
    • WG1 Higgs XS&BR parallel: Morning 2 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Dr Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
    • WG2 Higgs Properties Parallel: Morning 2 500/1-001 - Main Auditorium

      500/1-001 - Main Auditorium

      CERN

      400
      Show room on map
      Conveners: Daniele Barducci (Sapienza Universita e INFN, Roma I (IT)), Mauro Donega (ETH Zurich (CH))
      zoom link
      • 23
        STXS binnings for CP sensitivity (20'+10')

        The current Simplified Template Cross-Section (STXS) categorization leaves STXS analyses insensitive to CP-odd contributions in Higgs boson production, which are predicted by several models beyond the Standard Model. This presentation proposes to categorize events with two jets additionally via the dPhijj observable to make future Run 2+3 analyses sensitive to CP violation. The feasibility of such a splitting based on our present sensitivity is also discussed

        Speaker: Benedict Tobias Winter (Albert Ludwigs Universitaet Freiburg (DE))
        Recording
        talk.pdf
        Video preview
      • 24
        Towards STXS 1.3 (20'+10')
        Speaker: Matteo Bonanomi (Hamburg University)
        LHCHWG_STXS1.3.pdf
        Recording
        Video preview
      • 25
        Summary of WG2 CPV activity (20'+10')
        Speaker: Ken Mimasu (King's College London)
        CPV_Summary.pdf
        Recording
        Video preview
    • WG3 BSM Higgs Parallel: Morning 2 40/S2-A01 - Salle Anderson

      40/S2-A01 - Salle Anderson

      CERN

      100
      Show room on map
      Conveners: Abdollah Mohammadi (University of Wisconsin Madison (US)), Jana Schaarschmidt (University of Washington (US))
    • 12:30
      Lunch
    • Workshop Introduction 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Fabrizio Caola (University of Oxford (GB)), Gudrun Heinrich (KIT), Karsten Koeneke (Albert Ludwigs Universitaet Freiburg (DE)), Katharine Leney (Southern Methodist University (US)), Liantao Wang, Mauro Donega (ETH Zurich (CH)), Predrag Milenovic (University of Belgrade (RS)), Roberto Salerno (CNRS/IN2P3 - LLR, École polytechnique), stefania gori (UC Santa Cruz)
    • WG3 BSM Higgs Plenary 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Abdollah Mohammadi (University of Wisconsin Madison (US)), Jana Schaarschmidt (University of Washington (US))
    • 15:30
      Afternoon coffee
    • HH Plenary 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Elizabeth Brost (Brookhaven National Laboratory (US)), Javier Mazzitelli
    • Cross Topic Plenary: Discussion: recognition of junior members of the LHCHWG 503/1-001 - Council Chamber

      503/1-001 - Council Chamber

      CERN

      162
      Show room on map
      Conveners: Fabrizio Caola (University of Oxford (GB)), Gudrun Heinrich (KIT), Liantao Wang, stefania gori (UC Santa Cruz)
  • Tuesday 29 November
    • WG1 Higgs XS&BR Plenary: Part A 500/1-001 - Main Auditorium

      500/1-001 - Main Auditorium

      CERN

      400
      Show room on map
      Conveners: Dr Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
      • 44
        Introduction
        Speakers: Dr Alexander Karlberg (CERN), Bernhard Mistlberger, Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
        LHCHXS_WG1_Intro22.pdf
      • 45
        VBF group report
        Speaker: Stephane Brunet Cooperstein (Univ. of California San Diego (US))
        cooperstein_LHCVBFHSummary_29112022.pdf
        Recording
        Video preview
    • Cross Topic Plenary: Part A 500/1-001 - Main Auditorium

      500/1-001 - Main Auditorium

      CERN

      400
      Show room on map
      Convener: Dr Alexander Karlberg (CERN)
      • 46
        Issues in single and double Higgs production in BSM models (15'+8')
        Speaker: Michael Spira (Paul Scherrer Institute (CH))
        Recording
        spira_ext.pdf
        Video preview
      • 47
        Double Higgs production in extended Higgs sectors (15'+8')
        Speaker: Milada Margarete Mühlleitner
        CERNNov2022.pdf
        Recording
        Video preview
      • 48
        Top mass renormalization scheme uncertainties in Higgs cross sections (15'+8')
        Speakers: Javier Mazzitelli, Javier Mazzitelli (Paul Scherrer Institut (CH)), Javier Mazzitelli (Universidad de Buenos Aires (AR))
        top_uncertainties_mazzitelli.pdf
    • 11:00
      LHCC Student Poster Session 500/1-201 - Mezzanine

      500/1-201 - Mezzanine

      CERN

      10
      Show room on map

      https://indico.cern.ch/event/1204801/

    • 12:30
      Lunch
    • WG2 Higgs Properties Plenary 30/7-018 - Kjell Johnsen Auditorium

      30/7-018 - Kjell Johnsen Auditorium

      CERN

      190
      Show room on map
      Conveners: Daniele Barducci (Sapienza Universita e INFN, Roma I (IT)), Ken Mimasu (King's College London)
    • WG1 Higgs XS&BR Plenary: Part B 30/7-018 - Kjell Johnsen Auditorium

      30/7-018 - Kjell Johnsen Auditorium

      CERN

      190
      Show room on map
      Conveners: Dr Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
    • 16:00
      Afternoon coffee
    • WG1 Higgs XS&BR Plenary: Part C 30/7-018 - Kjell Johnsen Auditorium

      30/7-018 - Kjell Johnsen Auditorium

      CERN

      190
      Show room on map
      Conveners: Dr Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC National Accelerator Laboratory (US)), Julie Malcles (Université Paris-Saclay (FR)), Roberto Di Nardo (Università e INFN Roma Tre (IT))
    • 56
      Workshop Dinner at Luigia Academy in Meyrin Luigia Academy in Meyrin

      Luigia Academy in Meyrin
      Luigia Academy Menu (29.11.2022).pdf
      Workshop dinner
  • Wednesday 30 November
Powered by Indico v3.3.6-pre