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Higgs Pairs Workshop 2025

11โ€“17 May 2025
Isola d'Elba
Europe/Rome timezone

Conference Secretariat

Session

Plenary

12 May 2025, 09:00
Isola d'Elba

Isola d'Elba

Hotel Hermitage, La Biodola, Isola d'Elba (LI) - Italy

Conveners

Plenary: Opening Session

  • Ramona Groeber (Universitร  di Padova and INFN, Sezione di Padova)
  • Stefano Manzoni (CERN)

Plenary: Experimental performances

  • Marco Valente (CERN)
  • Andrea Carlo Marini (Universita & INFN Pisa (IT))

Plenary: non-resonant HH

  • Fabio Monti (CERN)
  • Valentina Cairo (CERN)

Plenary: non-resonant HH

  • Alessandra Betti (Sapienza Universitร  e INFN, Roma I (IT))
  • Nan Lu (University of Science and Technology of China (CN))

Plenary: Rare productions and quartic couplings

  • Alex Cerri (Universitร  di Siena / INFN)
  • Paolo Francavilla (Universita & INFN Pisa (IT))

Plenary: Resonant HH and scalar+H

  • Giuseppe Bagliesi (Universita & INFN Pisa (IT))
  • Marco Valente (CERN)

Plenary: Resonant HH and scalar+H

  • Paolo Azzurri (Universita & INFN Pisa (IT))
  • Dario Buttazzo

Plenary: LHCHWG YR

  • Andreas Papaefstathiou (Kennesaw State University, GA, USA)
  • Fabio Monti (CERN)

Plenary: Future colliders

  • Paolo Azzurri (Universita & INFN Pisa (IT))
  • Ramona Groeber (Universitร  di Padova and INFN, Sezione di Padova)

Plenary: Final session

  • Ramona Groeber (Universitร  di Padova and INFN, Sezione di Padova)
  • Paolo Azzurri (Universita & INFN Pisa (IT))

Presentation materials

There are no materials yet.

  1. 48. Welcome
    Agnese Ciocci (Universitร  di Siena / INFN), Alberto Annovi (INFN Sezione di Pisa)
    12/05/2025, 09:00
  2. 107. Welcome from the Programme Committee
    Ramona Groeber (Universitร  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 Universitรฉ, 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 (Universitรฉ 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 2b2ฮณ 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 2b2ฯ„ final state
    Carlo Schiavi (INFN e Universita Genova (IT)), Silvia Goy Lopez (CIEMAT - Centro de Investigaciones Energรฉticas 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
  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 Universitร  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, โ€ฆ) and quartic-coupling

    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

    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 2b2ฮณ final state
    Elise Anne Marie Jourd'Huy (Centre National de la Recherche Scientifique (FR)), Grigorii Tolkachev (CPPM, Aix-Marseille Universitรฉ, 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 2b2ฯ„ 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. 111. News
    Alberto Annovi (INFN Sezione di Pisa), Maria Agnese Ciocci (Universita di Siena & INFN Pisa (IT))
    15/05/2025, 14:59
  42. 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
  43. 86. Theory interplay between HH and diboson resonances
    Andrea Tesi (INFN)
    15/05/2025, 15:25
  44. 87. BSM Composite Higgs Models
    Stefania De Curtis (Universita e INFN, Firenze (IT))
    15/05/2025, 15:50
  45. 85. Summary of statistical excesses in di-Higgs and multi-boson searches
    Robert Les (Michigan State University (US))
    15/05/2025, 16:15
  46. 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

    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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  47. 97. The LHCHWG YR5
    Liza Brost (Brookhaven National Laboratory (US))
    15/05/2025, 17:30
  48. 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

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

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

    REMOTE PRESENTATION

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  52. 91. Higgs self-couplings at FCCee and CEPC
    Abraham Tishelman-Charny (Brookhaven National Laboratory (US)), Jia Liu (Peking University)
    16/05/2025, 15:30
  53. 92. Higgs self-couplings at ILC and CLIC
    Jenny List (Deutsches Elektronen-Synchrotron (DE))
    16/05/2025, 16:00
  54. 93. Higgs self-couplings at a future muon collider
    Xing Wang
    16/05/2025, 16:30
  55. 94. Higgs self-couplings at FCC-hh
    Angela Taliercio (Northwestern University (US))
    16/05/2025, 17:30
  56. 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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  57. 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

    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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  58. 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
  59. 105. Workshop conclusion
    Stefano Manzoni (CERN)
    16/05/2025, 19:15
  60. 73. Theory models that modify trilinear
  61. 74. Triple-Higgs searches in CMS
    Mr Aravind Thachayath Sugunan (Tata Institute of Fundamental Research)
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