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Higgs Pairs Workshop 2025

11–17 May 2025
Isola d'Elba
Europe/Rome timezone

Conference Secretariat

Contribution List

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  1. 48. Welcome
    Agnese Ciocci (Università di Siena / INFN), Alberto Annovi (INFN Sezione di Pisa)
    12/05/2025, 09:00
  2. 107. Welcome from the Programme Committee
    Ramona Groeber (Università di Padova and INFN, Sezione di Padova)
    12/05/2025, 09:10
  3. 49. Theory status for non resonant HH
    Joshua Davies (University of Liverpool)
    12/05/2025, 09:15
  4. 50. Overview of CMS HH non-resonant results
    Agni Bethani (Universite Catholique de Louvain (UCL) (BE))
    12/05/2025, 09:45
  5. 51. Overview of ATLAS HH non-resonant results
    Katharine Leney (Southern Methodist University (US))
    12/05/2025, 10:10
  6. 52. Theory status for resonant HH and Scalar+H
    Tania Robens (Rudjer Boskovic Institute (HR))
    12/05/2025, 11:05
  7. 53. Overview of ATLAS HH and Scalar+H resonant searches
    Minori Fujimoto (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))
    12/05/2025, 11:35
  8. 54. Overview of CMS HH and Scalar+H resonant searches
    Loukas Gouskos (Brown University (US))
    12/05/2025, 12:00
  9. 56. Trigger performance for HH at ATLAS and CMS
    Liaoshan Shi (UCL (GB)), Silvio Donato (Universita & INFN Pisa (IT))
    12/05/2025, 15:30
  10. 57. Jet and missing transverse momentum performance at ATLAS and CMS
    Charles Lewis (University of Washington (US)), Fabio Iemmi (Chinese Academy of Sciences (CN))
    12/05/2025, 16:00
  11. 58. Performance in tracking and flavour tagging at ATLAS and CMS
    Angela Maria Burger (Centre National de la Recherche Scientifique (FR)), Angela Zaza (Universita e INFN, Bari (IT))
    12/05/2025, 16:30
  12. 59. Tau performance at ATLAS and CMS
    Konstantin Androsov (Texas A & M University (US)), Sinead Farrington (University of Edinburgh)
    12/05/2025, 17:30
  13. 60. Photons and leptons performance at ATLAS and CMS
    Filippo Errico (Sapienza Universita e INFN, Roma I (IT)), Rosy Nikolaidou (Université Paris-Saclay (FR))
    12/05/2025, 18:00
  14. 61. ATLAS object performance at HL-LHC
    Lorenzo Santi (CERN)
    12/05/2025, 18:30
  15. 62. CMS object performance at HL-LHC
    Nicola Amapane (Universita e INFN Torino (IT))
    12/05/2025, 18:50
  16. 63. ATLAS and CMS non-resonant HH searches in the 4b final state
    Marina Kolosova (University of Florida (US)), Yizhou Cai (Nanjing University (CN))
    13/05/2025, 09:00
  17. 64. ATLAS and CMS non-resonant HH searches in the 2b2γ final state
    Adelina D'Onofrio (INFN Napoli (IT)), Irene Dutta (Fermi National Accelerator Lab. (US))
    13/05/2025, 09:30
  18. 65. ATLAS and CMS non-resonant HH searches in the 2b2τ final state
    Carlo Schiavi (INFN e Universita Genova (IT)), Silvia Goy Lopez (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    13/05/2025, 10:00
  19. 108. LOC Updates
    Alberto Annovi (INFN Sezione di Pisa), Prof. Maria Agnese Ciocci (Universita di Siena & INFN Pisa (IT))
    13/05/2025, 10:25
  20. 70. News on precision computations of HH: EW corrections
    Huai-Min Yu (Peking Univeristy)
    13/05/2025, 11:00
  21. 71. MC generators for HH in gluon fusion and VBF
    Gudrun Heinrich (KIT)
    13/05/2025, 11:25
  22. 72. EFTs for HH
    Christoph Englert
    13/05/2025, 11:50
  23. 66. ATLAS and CMS non-resonant HH searches in the 2b2l/2b2V final states
    Abhisek Datta (University of California Los Angeles (US)), Anyes Taffard (University of California Irvine (US))
    13/05/2025, 15:30
  24. 67. ATLAS and CMS non-resonant HH search in multi-leptons final states
    Ana Sculac (University of Split. Fac.of Elect. Eng., Mech. Eng. and Nav.Architect. (HR)), Anamika Aggarwal (Johannes Gutenberg Universitaet Mainz (DE))
    13/05/2025, 16:00
  25. 68. Di-Higgs combination, single-Higgs constraint and EFT interpretation in ATLAS and CMS
    Marco Delmastro (CNRS/IN2P3 LAPP)
    13/05/2025, 16:30
  26. 20. CMS results with EFT and UV completion
    Torben Lange (National Institute of Chemical Physics and Biophysics (EE))
    13/05/2025, 17:30
    Resonant HH/SH and BSM models
    Plenary
  27. 69. HL-LHC projections for di-Higgs non-resonant searches at ATLAS and CMS
    Davide Zuolo (University of Colorado - Boulder (US))
    13/05/2025, 17:50
  28. 109. Reminder: social event at 21:30
    Sandra Leone (Universita & INFN Pisa (IT))
    13/05/2025, 18:20
  29. 75. Triple-Higgs searches in ATLAS
    Alessandra Betti (Sapienza Università e INFN, Roma I (IT))
    14/05/2025, 09:00
  30. 76. Resonant BSM for HHH
    Dr Andreas Papaefstathiou (Kennesaw State University, GA, USA)
    14/05/2025, 09:20
  31. 17. Triple Higgs boson production in EFTs from on-shell amplitude techniques
    Michal Ryczkowski
    14/05/2025, 09:45
    Rare production mode (VHHH, HHH, …) and quartic-coupling
    Plenary

    With the measurement of double Higgs production within reach, it is justified to expand our interest to more exotic processes, such as three Higgs boson production. This rare process is crucial for advancing our understanding of the Higgs boson, its interactions (including self-coupling), the Higgs potential, and the mechanism of electroweak symmetry breaking (EWSB). This talk explores the...

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  32. 24. Connecting Multi-Higgs production and the Electroweak Phase Transition
    Osama Karkout (Nikhef National institute for subatomic physics (NL))
    14/05/2025, 10:05
    Resonant HH/SH and BSM models
    Plenary

    Exploring the Higgs sector via multi-Higgs production searches is a main goal for run-3 and high-lumi LHC. Can these searches inform us about the electroweak phase transition and matter-antimatter asymmetry?
    We address this question in the context of the TRSM (Two-Real-Singlet Model), which has known benchmark points enhancing multi-Higgs production.
    We update the triple-Higgs production...

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  33. 77. Search for HH in rare production modes (VHH, ttHH) at ATLAS and CMS
    Jessy Daniel (Centre National de la Recherche Scientifique (FR))
    14/05/2025, 10:25
  34. 110. Conference Photos
    14/05/2025, 10:50
  35. 78. Overview of BSM models not yet excluded (REMOTE)
    Georg Ralf Weiglein (Deutsches Elektronen-Synchrotron (DE))
    15/05/2025, 09:00

    REMOTE PRESENTATION

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  36. 79. ATLAS and CMS HH/SH resonant searches in the 4b final state
    Lidija Zivkovic (Institute of physics Belgrade (RS)), Santeri Laurila (CERN & Helsinki Institute of Physics (FI))
    15/05/2025, 09:30
  37. 80. ATLAS and CMS HH/SH resonant searches in the 2b2γ final state
    Elise Anne Marie Jourd'Huy (Centre National de la Recherche Scientifique (FR)), Grigorii Tolkachev (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))
    15/05/2025, 10:00
  38. 84. Interference/NLO effects in resonant Higgs pair production
    Johannes Alf Braathen (DESY)
    15/05/2025, 11:00
  39. 81. ATLAS and CMS HH/SH resonant searches in the 2b2τ final state
    Allison Mccarn Deiana (Southern Methodist University (US)), Valeria D'Amante (Universita & INFN Pisa (IT))
    15/05/2025, 11:30
  40. 82. ATLAS and CMS HH/SH resonant searches in other final states
    Devin Michael Aebi (Texas A & M University (US)), Mr Soumyananda Goswami (Oklahoma State University (US))
    15/05/2025, 12:00
  41. 112. Discussion
    Greg Landsberg (Brown University (US))
    15/05/2025, 14:00
  42. 111. News
    Alberto Annovi (INFN Sezione di Pisa), Maria Agnese Ciocci (Universita di Siena & INFN Pisa (IT))
    15/05/2025, 14:59
  43. 83. Combination of HH and Scalar+H resonant searches at ATLAS and CMS
    Alexandra Carvalho Antunes De Oliveira (Peking University (CN))
    15/05/2025, 15:00
  44. 86. Theory interplay between HH and diboson resonances
    Andrea Tesi (INFN)
    15/05/2025, 15:25
  45. 87. BSM Composite Higgs Models
    Stefania De Curtis (Universita e INFN, Firenze (IT))
    15/05/2025, 15:50
  46. 85. Summary of statistical excesses in di-Higgs and multi-boson searches
    Robert Les (Michigan State University (US))
    15/05/2025, 16:15
  47. 21. General CP-violating 2HDM in light of the excesses in di-photon searches at the LHC
    Guglielmo Coloretti (University of Zurich (UZH) / Paul Scherrer Institute (PSI))
    15/05/2025, 16:35
    Resonant HH/SH and BSM models
    Plenary

    The most general CP-violating two-Higgs-doublet model (2HDM) in the Yukawa alignment limit can produce significant di-photon branching ratios for the neutral scalars of the model. In the Higgs basis, where the two scalar doublets are identified as $H_1$ and $H_2$, the lagrangian term $Z_7 H_1^\dagger H_2 H_2^\dagger H_2 + {\rm h.c.}$ enters the branching ratios to di-photon of the new physics...

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  48. 97. The LHCHWG YR5
    Liza Brost (Brookhaven National Laboratory (US))
    15/05/2025, 17:30
  49. 9. Higgs pair production with higher power dependencies of the self-couplings
    Prof. Jian Wang (Shandong University)
    15/05/2025, 17:45
    Non-resonant HH and self-coupling
    Plenary

    The precise determination of the Higgs boson self-couplings is essential for understanding the mechanism behind electroweak symmetry breaking. However, due to the limited number of Higgs boson pair events at the LHC, only loose constraints have been established so far. Current constraints are based on the assumption that the cross section is a quadratic function of the trilinear Higgs...

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  50. 99. top quark mass renormalisation scheme uncertainty
    Sebastian Jaskiewicz
    15/05/2025, 18:05
  51. 38. Taming a leading theoretical uncertainty in HH measurements via accurate simulation for bbH production
    Elena Mazzeo (Università degli Studi e INFN Milano (IT))
    15/05/2025, 18:35
    Non-resonant HH and self-coupling
    Plenary

    We present a new simulation for Higgs boson production in association with bottom quarks ($bbH$) at next-to-leading order (NLO) matched to parton showers. The contributions proportional to the bottom-quark Yukawa coupling and top-quark Yukawa coupling (from gluon fusion) are both taken into account in a scheme with massive bottom quarks. The $bbH$ process constitutes a crucial background to...

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  52. 43. A calibratable jet-free HH(4b) search framework at the LHC
    Congqiao Li (Peking University (CN))
    16/05/2025, 09:00
    Performance: trigger, object reconstruction, calibration, and identification
    Parallel

    A calibratable experimental strategy is proposed to enhance the $HH(4b)$ search sensitivity via full-particle classification. Inspired by the competitive performance from the boosted-topology $HH$ analysis, which uses state-of-the-art jet neural networks to analyze $o(100)$ particles within large-$R$ jets, this approach aims to extend its strong signal-to-background discrimination power beyond...

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  53. 4. A Future Higgs Factory - The Circular Electron Positron Collider (CEPC)
    Mingshui Chen (Chinese Academy of Sciences (CN))
    16/05/2025, 09:00
    Self coupling at future colliders
    Parallel

    The Circular Electron Positron Collider (CEPC) was proposed shortly after the discovery of the Higgs boson at the LHC, as a Higgs factory, with the possibility of being upgraded to a proton-proton collider in the future. The CEPC Study Group has been continuously working on the design of the accelerator, the R&D of critical technologies and components for both the collider and the...

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  54. 25. A novel implementation of the Matrix Element Method at next-to-leading-order (NLO) for the measurement of the Higgs tri-linear coupling in di-Higgs production at the LHC
    Matthias Jean Tartarin (Laboratoire des 2 Infinis - Toulouse, CNRS / Univ. Paul Sabatier (FR))
    16/05/2025, 09:00
    Non-resonant HH and self-coupling
    Parallel

    One of the LHC's priorities, following the discovery of the Higgs boson, is to observe the production of Higgs pairs and to measure the Higgs tri-linear coupling $\lambda_{3H}$.
    Due to the rarity of di-Higgs production, measuring $\lambda_{3H}$ has proven to be highly challenging. Exclusion limits have been observed using a variety of approaches, including cut-based methods and boosted...

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  55. 16. CMS Level-1 Trigger improvements for HH at the HL-LHC
    Artur Lobanov (University of Hamburg (DE))
    16/05/2025, 09:20
    Performance: trigger, object reconstruction, calibration, and identification
    Parallel

    The CMS Level-1 Trigger will be upgraded for the HL-LHC in order to cope with the increased pileup and upgraded detectors. In particular, the inclusion of the tracker will enable offline-like Particle Flow reconstruction at L1, which will allow preserving and even potentially extending the trigger acceptance. This talk will give a brief overview of the upgraded L1 Trigger, the expected...

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  56. 106. New results for HH→bbγγ with the ATLAS experiment
    Spyridon Merianos (Aristotle University of Thessaloniki (GR))
    16/05/2025, 09:20
  57. 88. The FCC project
    Marina Cobal (Universita degli Studi di Udine (IT))
    16/05/2025, 09:30
  58. 30. ATLAS advanced identification techniques for Boosted $H \to \tau\tau$
    Gadi Ninio (Tel Aviv University (IL))
    16/05/2025, 09:40
    Performance: trigger, object reconstruction, calibration, and identification
    Parallel

    The identification of Lorentz-boosted Higgs boson is a critical challenge in advancing Higgs pair production studies. This talk provides a comprehensive overview of recent developments on techniques to identify boosted Higgs bosons decaying into tau lepton pairs ($H \to \tau\tau$), on offline reconstruction. Both hadronic ($H \to \tau_{\mathrm{had}}\tau_{\mathrm{had}}$) and leptonic ($H \to...

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  59. 32. Search for Higgs Pair Production Decaying into 2 Photons and 2 b Quarks at the High-Luminosity LHC
    Arthur Lafarge (Université Clermont Auvergne (FR))
    16/05/2025, 09:40
    Non-resonant HH and self-coupling
    Parallel

    The Standard Model (SM) is currently the most predictive framework for describing interactions among the fundamental constituents of matter. It includes 19 free parameters, which are measured experimentally, notably with the ATLAS detector at the Large Hadron Collider (LHC) at CERN. These parameters encompass particle masses, phases, and coupling values. One of these couplings, the Higgs boson...

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  60. 89. A Linear Collider Facility for CERN
    Jenny List (Deutsches Elektronen-Synchrotron (DE))
    16/05/2025, 10:00
  61. 33. Advances in Trigger Strategies for the Run 3 HH->bbtautau search in the ATLAS experiment
    Davide Fiacco (Sapienza Universita e INFN, Roma I (IT))
    16/05/2025, 10:00
    Performance: trigger, object reconstruction, calibration, and identification
    Parallel

    The HH searches are fundamentally constrained by statistical limitations. Enhancing the sensitivity to the HH → bbττ decay channel, the most sensitive process for Higgs pair production in ATLAS, necessitates innovative trigger strategies. Conventional trigger approaches adopted for the HH → bbττ channel in Run 2, focusing solely on di-τ triggers have faced challenges in capturing the full...

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  62. 22. Top-Yukawa-induced corrections to Higgs pair production
    Sauro Carlotti
    16/05/2025, 10:00
    Non-resonant HH and self-coupling
    Parallel

    After the discovery of the Higgs boson in 2012, the measurements of the Higgs self coupling is still a challenge for current and future experiments in particle physics.
    Higgs-boson pair production via gluon fusion is a loop-induced process. In order to increase the accuracy of the theoretical predictions for this process, higher-order corrections are necessary to reduce theoretical...

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  63. 37. Calibration of the GN2 b-tagging algorithm with ttbar and Z+jets events using 140 fb^-1 of ATLAS proton-proton collsion data at sqrt(s)=13 TeV
    Martino Tanasini (Stony Brook University (US))
    16/05/2025, 10:15

    Jet flavour-tagging algorithms to identify hadronic jets containing b-hadrons are crucial tools for searches of Higgs boson pair production in the ATLAS experiment at the LHC, due to the large branching ratio of the H-->bb process. GN2, the state-of-the-art jet flavour-tagging algorithm developed by ATLAS, delivers a performance that significantly surpasses its predecessors and is expected to...

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  64. 26. Light-Quark Electroweak Contributions to Double Higgs Production at Hadron Colliders
    Mr Marco Bonetti (IAP Karlsruher Institut für Technologie)
    16/05/2025, 10:15
    Non-resonant HH and self-coupling
    Parallel

    A precise determination of the Higgs boson self-coupling is a central objective in high-energy physics, offering critical insight into the structure of the Higgs potential and electroweak symmetry breaking. As the Hi-Lumi phase at the LHC aims to tighten constraints on this coupling, next-to-leading order (NLO) electroweak corrections to double Higgs production become a critical component of...

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  65. 15. Boosted HH at CMS
    Raghav Kansal (California Institute of Technology)
    16/05/2025, 11:00
    Non-resonant HH and self-coupling
    Parallel

    We present searches for nonresonant Higgs boson (H) pair production in the highly Lorentz-boosted phase space with the CMS experiment at the LHC. The analyses are performed in the all-hadronic 4b and bbVV final states, with boosted H pairs identified using novel graph neural network and transformer algorithms for wide-radius jets. Constraints are placed on the strengths relative to the...

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  66. 46. CMS ZH resonant searches
    Andrea Malara (Universite Libre de Bruxelles (BE))
    16/05/2025, 11:00
    Resonant HH/SH and BSM models
    Parallel

    This presentation will cover the searches for BSM resonances decaying to a scalar particle H and a standard model (SM) Z boson at the CMS experiment. These searches are one the most powerful probes of the two-Higgs-doublet models at the LHC, and are complementary to the searches for scalars decaying to SM Higgs bosons (h). One of the major differences with respect to the resonant hh/Sh...

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  67. 7. Trilogy of event reconstruction at electron positron Higgs factory (REMOTE)
    Manqi Ruan (Chinese Academy of Sciences (CN))
    16/05/2025, 11:00
    Self coupling at future colliders
    Parallel

    REMOTE PRESENTATION

    The electron positron Higgs factory is regarded as the highest priority future collider facility, as it could bring decisive data from the Higgs portal to address the long standing Known Unknowns such as the origin of matter, the nature of Dark matter, the naturalness problem, etc. Meanwhile, these facilities, especially the circular ones like CEPC or FCC, could produce...

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  68. 28. Analysis improvements for the Higgs self-coupling measurement at ILD
    Bryan Bliewert (Deutsches Elektronen-Synchrotron (DE))
    16/05/2025, 11:20
    Self coupling at future colliders
    Parallel

    A precise determination of the Higgs self-coupling represents a cornerstone of the physics program of future colliders because it gives important insights into the shape of the Higgs potential and thus into the evolution of the early universe. This contribution will present an update of the analysis of di-Higgs production in $e^+e^-$ collisions at \mbox{500 GeV} using detailed simulations of...

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  69. 45. CMS HH/SH resonant searches in bbVV channels
    Amitav Mitra (Johns Hopkins University (US))
    16/05/2025, 11:20
    Resonant HH/SH and BSM models
    Parallel

    The HH/SH resonant searches in the bbWW and bbZZ decay channels are presented in this talk. This channel is particularly important for beyond standard model searches because for certain values of the S mass, i.e. below the HH threshold and above the ZZ (or WW) threshold, this could be the SH decay channel with the largest branching ratio. Dedicated searches are carried out at the CMS...

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  70. 6. Two-loop running effects in Higgs physics in Standard Model Effective Field Theory
    Dr Stefano Di Noi (K.I.T.)
    16/05/2025, 11:20
    Non-resonant HH and self-coupling
    Parallel

    We consider the renormalization group equations within the Standard Model Effective Field Theory and compute two-loop contributions proportional to the top quark Yukawa coupling for the operator generating an effective Higgs-gluon coupling, focusing on the Yukawa-like operator.
    These two-loop running effects
    are relevant for processes where the effective Higgs-gluon coupling contributes ata...

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  71. 18. VBF-HH at NLO QCD in non-linear Higgs Effective Field Theory
    Marius Höfer (KIT)
    16/05/2025, 11:35
    Non-resonant HH and self-coupling
    Parallel

    We present a calculation of the NLO QCD corrections to Higgs boson pair production in vector boson fusion including anomalous couplings. Those couplings are generated by the relevant leading operators of the non-linear Higgs Effective Field Theory (HEFT). We use the Monte Carlo program Whizard interfaced with the amplitude provider GoSam to investigate EFT effects at the level of the total...

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  72. 44. CMS HH/SH resonant search with anomaly detection algorithm
    Matej Roguljic (Johns Hopkins University (JHU))
    16/05/2025, 11:40
    Resonant HH/SH and BSM models
    Parallel

    A search for a new massive particle X decaying into a Higgs boson H and a second particle, Y using an anomaly detection algorithm is presented. The dataset collected by the CMS experiment in proton-proton collisions at 13 TeV center-of-mass energy is analyzed. The final states with Higgs bosons decaying to a bb quark pair and reconstructed a single large-radius jets are considered. This search...

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  73. 29. One Loop BSM Triple Higgs Couplings at future electron-positron colliders via double Higgs production
    Francisco Arco (DESY)
    16/05/2025, 11:40

    We analyze the impact of one-loop corrections to triple Higgs bosons on the di-Higgs production cross section at $e^+e^-$ colliders within the two Higgs doublet model (2HDM). In particular, we study the production cross section of two SM-like Higgs bosons together with a boson, also known as double Higgs-strahlung. The one-loop triple Higgs couplings are calculated using the one-loop...

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  74. 14. Double Higgs production and the Higgs self coupling in Global SMEFT fits
    Alejo Nahuel Rossia (University of Padua and INFN Sezione di Padova)
    16/05/2025, 11:50
    Non-resonant HH and self-coupling
    Parallel

    The ongoing Standard Model Effective Field Theory (EFT) program at the LHC and elsewhere aims at charting the parameter space allowed for deviations from the SM coming from heavy Beyond Standard Model (BSM) physics. Possible hints of New Physics could appear as subtle correlated deviations in several observables but parameterized by a single parameter. Hence, the community has invested great...

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  75. 23. Looking for a SFOEWPT in the RxSM at the HL-LHC and LISA
    Alain Verduras Schaeidt (DESY)
    16/05/2025, 12:00
    Self coupling at future colliders
    Parallel

    We explore the real-singlet extension of the Standard Model without a Z2 symmetry (RxSM) as a framework to address the baryon asymmetry of the Universe and investigate modifications to the Higgs potential. First, we identify regions of parameter space that allow a Strong First-Order Electroweak Phase Transition (SFOEWPT) using the public tools BSMPT, CosmoTransitions, and TransitionListener,...

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  76. 8. Resonant HH production: interference effects and higher order loop corrections
    Kateryna Radchenko Serdula (DESY)
    16/05/2025, 12:00
    Resonant HH/SH and BSM models
    Parallel

    In my talk, I will show that potentially large higher-order corrections to the trilinear Higgs coupling in Beyond the Standard Model (BSM) scenarios could enhance the interference effects between the non-resonant contribution to Higgs pair production and a resonantly produced heavy scalar. These interference effects have a significant impact on the expected shape of the differential cross...

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  77. 41. Impact of renormalisation group equation on Higgs production in the SMEFT
    Giuseppe Ventura
    16/05/2025, 12:05
    Non-resonant HH and self-coupling
    Parallel

    We study the impact of RGE running and mixing of SMEFT operators on differential observables in $Hj$,$t \bar{t} H$ and $HH$ production at the LHC. We focus on a subset of operators closed under the QCD-induced anomalous dimension matrix and explore the impact of employing a fixed or dynamical scale on the EFT predictions for the Higgs transverse momentum and Higgs pair invariant mass spectra....

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  78. 90. the Higgs potential and gravitational waves (REMOTE)
    Chiara Caprini (CERN)
    16/05/2025, 15:00

    REMOTE PRESENTATION

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  79. 91. Higgs self-couplings at FCCee and CEPC
    Abraham Tishelman-Charny (Brookhaven National Laboratory (US)), Jia Liu (Peking University)
    16/05/2025, 15:30
  80. 92. Higgs self-couplings at ILC and CLIC
    Jenny List (Deutsches Elektronen-Synchrotron (DE))
    16/05/2025, 16:00
  81. 93. Higgs self-couplings at a future muon collider
    Xing Wang
    16/05/2025, 16:30
  82. 94. Higgs self-couplings at FCC-hh
    Angela Taliercio (Northwestern University (US))
    16/05/2025, 17:30
  83. 95. Theory challenges for Higgs self coupling measurements at future lepton colliders (REMOTE)
    Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin))
    16/05/2025, 18:00

    REMOTE PRESENTATION

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  84. 12. Theory challenges for Higgs self coupling measurements at future hadron colliders
    Michael Spira (Paul Scherrer Institute (CH))
    16/05/2025, 18:30
    Self coupling at future colliders
    Plenary

    Higgs-boson pairs are dominantly produced via gluon fusion at hadron colliders, i.e. via a loop-induced process. This process will constitute the first direct access to the trilinear Higgs self-interaction. In recent years the NLO QCD corrections involving the full top-mass dependence became available by means of numerical integrations, since analytical methods available so far are not capable...

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  85. 96. EPS poster prize
    Gudrun Heinrich (KIT), Jacobo Konigsberg (University of Florida (US)), Marina Cobal (Universita degli Studi di Udine (IT)), Xinchou LOU (IHEP,CAS)
    16/05/2025, 19:00
  86. 105. Workshop conclusion
    Stefano Manzoni (CERN)
    16/05/2025, 19:15
  87. 103. ATLAS electron and photon energy calibration with Run 3 data
    Tao Hsu (Université Paris-Saclay (FR))
    Poster
    Poster
    Poster

    This poster presents the latest result on ATLAS Run 3 electron and photon in situ energy scale and resolution calibration

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  88. 104. HL-LHC prospects for the search of boosted Higgs boson pair production via vector-boson fusion in the 4b final state at the ATLAS experiment
    Dilia Maria Portillo Quintero (TRIUMF (CA))
    Poster
    Poster
    Poster

    Projection studies for non-resonant Higgs boson pair production via vector-boson fusion in the 4b final state with the luminosity-upgraded ATLAS detector at the High Luminosity LHC (HL-LHC) are presented. These studies are the first HL-LHC prospects on the boosted di-Higgs topology, where each Higgs boson is constructed as a single large-radius jet. The latest Run 2 analysis results using 140...

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  89. 5. Probing exotic Higgs decays to 4$\tau$ in single and di-Higgs production at the HL-LHC and FCC-hh
    Camellia Bose (Indian Institute of Science)
    Poster
    Poster
    Poster

    We study the prospects for observing exotic decays of the Standard Model (SM) Higgs boson $h$ into light beyond the Standard Model (BSM) scalars $a$ with mass $m_{a} \lesssim m_{h}/2$ in the single Higgs and Higgs pair production channels at the High Luminosity run of the Large Hadron Collider (HL-LHC). Discovery prospects for single Higgs production in the gluon-gluon fusion and vector boson...

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  90. 31. Search for Higgs boson pairs with multi-lepton final states in pp collisions at √s = 13 TeV with the ATLAS detector
    Rea Thornberry (Southern Methodist University (US))
    Poster
    Poster
    Poster

    A search is presented for non-resonant Higgs boson pair production decaying to multi-lepton final states using 140 fb-1 of proton-proton collision data at centre-of-mass energy 13 TeV, recorded with the ATLAS detector during Run 2 of the LHC. Nine search channels with varying multiplicities of electrons, muons, taus, and photons are combined to determine the observed (expected) limit on the...

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  91. 47. Studies of boosted topology for the non-resonant HH search in bbττ and bbγγ final states
    Yibo Zhong (Purdue University (US))
    Poster
    Poster
    Poster

    The study of boosted Higgs boson pair (HH) production enables the development of advanced reconstruction and identification techniques crucial for probing the Higgs self-coupling and potential new physics beyond the Standard Model. In this work, we focus on methodologies for analyzing the boosted topology, where one Higgs boson is produced with high transverse momentum, leading to collimated...

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  92. 36. Study of a Kinematic Fit algorithm for the HH->bbyy channel at the ATLAS detector
    Romano Orlandini (Universita e INFN Roma Tre (IT))
    Poster
    Poster
    Poster

    The search for Higgs bosons pairs, produced at the LHC, is a fundamental step for the study and understanding of the Higgs field potential, responsible for the spontaneous breaking of the electro-weak symmetry. In fact, the observation of this rare phenomenon would allow us to have an estimate of the cubic term of the potential. However, due to the low number of expected events, many efforts...

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  93. 73. Theory models that modify trilinear
  94. 27. Towards full EW corrections to Higgs pair production
    Augustin Vestner
    Poster
    Poster
    Poster

    With the upcoming HL-LHC and the increased experimental precision, the calculation of electroweak corrections to Higgs boson pair production in gluon fusion is important for sufficiently precise theory predictions. This talk will present recent results regarding Yukawa and Higgs self-coupling induced corrections and discuss the status of our calculation including gauge bosons.

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  95. 74. Triple-Higgs searches in CMS
    Mr Aravind Thachayath Sugunan (Tata Institute of Fundamental Research)
  96. 102. Updated measurement prospects for di-Higgs production in the HH->2b2y channel with the ATLAS experiment at the HL-LHC
    Alex Zeng Wang (University of California,Santa Cruz (US))
    Poster
    Poster
    Poster

    We present an updated prospect study on di-Higgs production in the HH→bbγγ decay channel with the ATLAS experiment at the High Luminosity LHC (HL-LHC). The latest projections are based on extrapolating the recent legacy Run 2 ATLAS search and therefore improve over the previous results shown

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  97. 101. Using Boosted Decision Trees based event categorization to target SM and BSM HH->2b2y at ATLAS
    Punit Sharma (Brookhaven National Laboratory (US))
    Poster
    Poster
    Poster

    In this poster, we present a study of di-Higgs production in the HH→bbγγ decay channel using data from the ATLAS experiment. This channel is considered one of the "golden channels" for constraining the Higgs self-coupling, benefiting from the high branching ratio of the H→bb decay and the excellent ATLAS photon triggers. The analysis employs Boosted Decision Trees (BDTs) to define event...

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