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The 22nd Workshop of the LHC Higgs Working Group

3–5 Dec 2025
CERN
Europe/Zurich timezone

LHC Higgs WG Steering Committee

Contribution List

88 out of 88 displayed
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  1. 102. Workshop opening
    Ramona Groeber (Università di Padova and INFN, Sezione di Padova)
    03/12/2025, 09:00
  2. 103. ATLAS Highlight talk (15'+5')
    Lydia Brenner (Nikhef)
    03/12/2025, 09:15
  3. 104. CMS Highlight talk (15'+5')
    Jonathon Mark Langford (Imperial College)
    03/12/2025, 09:35
  4. 105. Double Higgs Production via Vector Boson Fusion in SMEFT (15'+5')
    Michal Jakub Ryczkowski (Università di Padova and INFN, Sezione di Padova)
    03/12/2025, 09:55
  5. 106. Differential observables for Higgs-strahlung process to all orders in EFT (15'+5')
    Sourav Bera (Tata Institute of Fundamental Research, Mumbai)
    03/12/2025, 10:15
  6. 107. Global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables (15'+5')
    Victor Miralles (University of Manchester)
    03/12/2025, 11:10
  7. 108. POPxf: An Exchange Format for Polynomial Observable Predictions (15'+5')
    Ken Mimasu (University of Southampton)
    03/12/2025, 11:30
  8. 109. Probing H$\tau\tau$ Coupling and CP properties at FCC-ee (15'+5')
    Sofia Giappichini (KIT - Karlsruhe Institute of Technology)
    03/12/2025, 11:50
  9. 110. ATLAS+CMS Outlook talk (20'+10') [remote]
    Brendon Bullard (SLAC)
    03/12/2025, 12:10
  10. 126. WG1 - Introduction
    Alessandro Calandri (Università & INFN, Firenze), Alexander Karlberg (University of Oxford), Bernhard Mistlberger (SLAC), Hannah Arnold (Stony Brook University)
    03/12/2025, 14:00
  11. 127. ggF (17'+5')
    Stephen Jones (IPPP Durham)
    03/12/2025, 14:05
  12. 128. VBF (17'+5')
    Silvia Ferrario Ravasio (Università degli Studi di Torino)
    03/12/2025, 14:27
  13. 129. VH (17'+5') [remote]
    Suman Chatterjee (DESY)
    03/12/2025, 14:49
  14. 157. Search for H -> bb and H -> cc at LHCb and future prospects (15'+5') [remote]
    Qundong Han (Università & INFN, Padova)
    03/12/2025, 15:11
  15. 86. bbH subgroup report: Modelling bbH production for the LHC at 13.6 TeV
    Christian Biello (ETH Zurich)
    03/12/2025, 16:00
  16. 132. Report from the Extended Higgs Sector (theory+experiment)
    Nikolaos Rompotis (University of Liverpool), Thomas Biekoetter (IFT Madrid)
    03/12/2025, 16:30
  17. 133. Report from the NMSSM subgroup
    Milada Margarete Mühlleitner (KIT)
    03/12/2025, 17:00
  18. 160. All-hadronic VH measurements from ATLAS and CMS (15'+3') [remote]
    Zhi Zheng (SLAC)
    04/12/2025, 09:00
  19. 111. EFT Theory Uncertainties at the LHC (25'+5')
    Francesco Montagno (IFAE Barcelona)
    04/12/2025, 09:00
  20. 87. The structure of quark mass corrections in the gg→HH amplitude at high-energy (15'+5')
    Sebastian Eryk Jaskiewicz (University of Bern)
    04/12/2025, 09:00
  21. 117. Using machine learning to predict large pseudoscalar H125 couplings to fermions (12'+3')
    Rafael Boto (Instituto Superior Técnico)
    04/12/2025, 09:00

    Theories with multiple Higgs doublets allow Higgs couplings to significantly deviate from Standard Model values, enabling indirect probes of extra scalars. The observed couplings already place stringent limits on such theories. In this talk, I will review the situation in models with two Higgs doublets and then extend into three Higgs doublets. For more than two doublets, there are five...

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  22. 116. A smoking gun signature of 3HDM (12'+3') [remote]
    Atri Dey (DIAS)
    04/12/2025, 09:15

    We analyze new signals of a 3-Higgs Doublet Model (3HDM) at the Large Hadron Collider (LHC), where only one doublet acquires a Vacuum Expectation Value (VEV), preserving a Z2 parity. The other two doublets are inert and do not develop a VEV, leading to a dark scalar sector controlled by Z2, with the lightest CP-even dark scalar H1 being the DM candidate. This leads to the loop-induced decay...

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  23. 161. Charge asymmetry measurement in WH(->tautau) at CMS (15'+3')
    Nicolò Trevisani (KIT)
    04/12/2025, 09:18
  24. 88. New HH BSM benchmarks (15'+5')
    Milada Margarete Mühlleitner (KIT)
    04/12/2025, 09:20
  25. 112. Bridging theory and experiment in the search for CP violating Higgs interactions: Parametrizations and dictionary (25'+5')
    Marta Fuentes Zamoro (UA Madrid)
    04/12/2025, 09:30
  26. 115. LHC Signatures of a Vector-Like Top Partner and Charged Higgs Boson in the 2HDM-II (12'+3')
    Mohammed Boukidi (IFJ PAN)
    04/12/2025, 09:30

    I will present the collider phenomenology of a vector-like top partner (VLT) within the Type-II Two-Higgs-Doublet Model (2HDM-II) extended by a vector-like quark doublet. The study focuses on final states involving a charged Higgs boson. In this framework, the VLT predominantly decays through exotic channels, leading to signatures with high $b$-jet multiplicity and leptonic components. The...

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  27. 166. Measurement of ttH(->multilepton) production at ATLAS (15'+3')
    Nihal Brahimi (CNRS/IN2P3 LAPP)
    04/12/2025, 09:36
  28. 89. ATLAS+CMS HHH recent results (15'+5')
    Marko Stamenkovic (Brown University)
    04/12/2025, 09:40
  29. 118. Search for an invisible scalar in $t\bar{t}$ final states at the LHC (12'+3')
    Rodrigo Capucha (Centro de Física Teórica e Computacional, FCUL)
    04/12/2025, 09:45

    We present a phenomenological study where an invisible scalar mediator is produced in association with a top-quark pair at the Large Hadron Collider (LHC). Using a $t\bar{t}$ experimental-like analysis, we search for light scalar particles that could be hidden in the $t\bar{t}$ final state. The signal process $pp \rightarrow t\bar{t}Y_0$ is generated within a simplified dark matter (DM) model...

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  30. 168. ttH cross-section at NNLO+NNLL (15'+3') [remote]
    Anna Kulesza (ITP Muenster)
    04/12/2025, 09:54

    arxiv:2503.15043

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  31. 114. Could electron-top interactions spoil the measurement of the Higgs trilinear? A quantitative estimate at future lepton colliders (25'+5')
    Lucine Tabatt (Humboldt U. Berlin)
    04/12/2025, 10:00
  32. 90. Direct probes of the quartic Higgs self-coupling (15'+5')
    Gilberto Tetlalmatzi-Xolocotzi (Siegen University)
    04/12/2025, 10:00
  33. 119. Distinguishing $A\to HZ$ and $H\to AZ$ with top-quark spin correlations (12'+3')
    Francisco Arco (DESY)
    04/12/2025, 10:00

    We propose angular observables sensitive to top-quark spin correlations to distinguish between the pseudoscalar $A\to HZ$ and the scalar $H\to AZ$ signals (where and denote CP-odd and CP-even Higgs bosons, respectively) in $Zt\bar t$ final states at the LHC. Current searches performed by ATLAS and CMS are insensitive to the CP nature of BSM scalar states in the case of identical production...

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  34. 120. Charged Higgs Pairs at the LHC: A NLO Analysis (12'+3')
    Michael Spira (Paul Scherrer Institute)
    04/12/2025, 10:15

    Charged Higgs-pair production at hadron colliders provides an option to obtain information about the trilinear couplings involving charged Higgs states of BSM Higgs potentials. We analyze the corresponding production modes, Drell–Yan-like production, gluon fusion and vector-boson fusion at next-to-leading order with respect to the corresponding uncertainties originating from the scale...

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  35. 121. LHC Constraints on Vector-like Quarks within the Two-Higgs-Doublet Model Framework (12'+3') [remote]
    Khawla Salime (Cadi Ayyad University, Marrakech)
    04/12/2025, 11:00

    We investigated the collider phenomenology of Vector-like Quarks (VLQs) - specifically the top ($T$) and bottom ($B$) quarks within the framework of the Two-Higgs-Doublet Model Type II (2HDM-II), considering both singlet and doublet representations. While current LHC searches constrain VLQs decaying exclusively into Standard Model (SM) final states, the presence of additional scalars in the...

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  36. 92. Public ggxy library (12'+3')
    Kay Schonwald (U. of Zürich)
    04/12/2025, 11:00

    ggxy is a C++ library which currently includes gg $\to$ HH up to NLO in QCD. It is able to produce differential distributions in about 30 minutes on a laptop, both for on-shell and MSbar top quark masses and including a 7-point scale variation. ggxy has been linked to Powheg and Herwig to enable the matching to parton showers. Runtime tests have shown that it is a faster a by a factor of 4-5...

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  37. 162. Scattering amplitudes for 3-loop Higgs+Jet production (15'+3')
    Xiang Chen (University of Zurich)
    04/12/2025, 11:00

    arXiv:2504.06490

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  38. 171. VHbb CP analysis (19'+3') [remote]
    Ricardo Barrué (Marietta Blau Institute for Particle Physics, Vienna)
    04/12/2025, 11:00
  39. 93. Higgs-Pair Production via Gluon Fusion: Top-Yukawa- and light-quark-induced electroweak Corrections (12'+3')
    Sauro Carlotti (Karlsruher Institut für Technologie - ITP)
    04/12/2025, 11:15

    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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  40. 122. Strong First-Order Phase Transitions and Exotic Intermediate Phases in the CP-Conserving 2HDM (12'+3')
    Christoph Borschensky (Karlsruhe Institute of Technology)
    04/12/2025, 11:15

    Extended scalar sectors can significantly influence the cosmological evolution of the early universe. The additional scalar degrees of freedom allow for strong first-order phase transitions (SFOPT) into the electroweak-broken vacuum, which induce gravitational waves that, for sufficiently strong signals, might be detectable in the near future. Additionally, the universe might have undergone...

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  41. 163. Interference effects in gluon-fusion Higgs boson production (15'+3') [remote]
    Federica Devoto (SLAC)
    04/12/2025, 11:18

    arXiv:2312.12384

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  42. 153. Search for anomalous HVV coupling in the gamma gamma final state (19'+3')
    Federica De Riggi (Sapienza Università & INFN, Roma1)
    04/12/2025, 11:22
  43. 123. Electroweak Baryogenesis with BARYONET: Theory and Applications (12'+3')
    Giulio Barni (IFT Madrid)
    04/12/2025, 11:30

    I will present BARYONET, an open-source framework for computing the baryon asymmetry of the Universe within electroweak baryogenesis (EWBG). Starting from the semiclassical WKB approach, where spatially varying complex masses across expanding bubble walls generate CP-violating forces, we derive and solve the transport equations governing chemical potentials and velocity perturbations, leading...

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  44. 94. Electroweak corrections to Higgs boson pair production: The light quark case (12'+3')
    Philipp Rendler (Institute for Theoretical Physics, KIT)
    04/12/2025, 11:30

    We present a fully analytic computation of the two-loop electroweak corrections to double Higgs production in gluon fusion, mediated by light quarks. The calculation is performed using the method of differential equations, employing a large mass expansion to generate boundary functions. We implement the results in the POWHEG BOX framework for phenomenological studies. The corrections to the...

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  45. 165. Higgs off-shell measurements at CMS using Run 2 data (15'+3')
    Pedro Fernandez Manteca (CERN)
    04/12/2025, 11:36
  46. 154. Higgs-top coupling measurements from ATLAS and CMS (19'+3’) [remote]
    Valentina 🐧 Vecchio (University of Manchester)
    04/12/2025, 11:44
  47. 95. SMEFT and HEFT di-Higgs Event-Level Reweighting (12'+3')
    Matheus Pereira Coelho (Center for Natural and Human Sciences, Federal University of ABC - UFABC)
    04/12/2025, 11:45

    Di-Higgs (HH) production provides valuable information about loosely constrained quantities of the Higgs potential, such as the Higgs trilinear self-coupling. The measurement of these properties can confirm SM predictions or point to BSM physics, where non-resonant HH production is typically described by Effective Field Theories (EFTs).

    The event-level reweighting consists of parameterizing...

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  48. 124. V-associated production & vector boson fusion of Higgs bosons as an LHC signature of CP violation (12'+3')
    Alvaro Lozano Onrubia (IFT UAM-CSIC)
    04/12/2025, 11:45

    Many well-motivated extensions of the Standard Model predict new, entirely bosonic sources of CP violation (CPV). In these scenarios, the simultaneous observation of carefully selected bosonic processes emerges as a simple yet powerful method to unambiguously reveal the presence of CPV. The present study, which establishes a promising framework of CPV searches for the upcoming HL-LHC era,...

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  49. 167. Gluon fusion background for VBF (15'+3') [remote]
    Christian Preuss (University of Goettingen)
    04/12/2025, 11:54
  50. 96. Higgs pair production via gluon fusion to higher orders in HEFT (12'+3')
    Konstantin Schmid (University and INFN Padova)
    04/12/2025, 12:00

    Higgs pair production offers the opportunity to probe correlations among the couplings of one or two Higgs bosons to fermions and gauge bosons. In this context, it serves as a powerful test of the underlying EFT framework. In this talk, we study Higgs pair production via gluon fusion within the Higgs Effective Field Theory (HEFT). We demonstrate that adopting a consistent power counting in...

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  51. 125. Probing Strong First-Order Electroweak Phase Transition scenarios in 2HDM with FCC-ee/CEPC (12'+3')
    Anisha . (Karlsruhe Institute of Technology)
    04/12/2025, 12:00

    We investigate the potential of future electron-positron colliders, such as FCC-ee and CEPC, to probe 2-Higgs-doublet models (2HDMs) that facilitate a strong first-order electroweak phase transition (SFOEWPT), a necessary condition for electroweak baryogenesis. Focusing on a 2HDM in the CP-conserving limit, we identify parameter regions consistent with an SFOEWPT and evaluate their...

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  52. 155. Higgs to charm coupling (19'+3')
    Ming-Yan Lee (Rheinisch Westfaelische Tech. Hoch.)
    04/12/2025, 12:06
  53. 164. Including QED effects in global PDF’s (15'+3') [remote]
    Timothy J Hobbs (Argonne National Laboratory)
    04/12/2025, 12:12

    arXiv:2508.06603

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  54. 97. NMSSMScanner - Performing intelligent scans in the NMSSM parameter space (12'+3')
    Martin Gabelmann (U. Freiburg)
    04/12/2025, 12:15

    In supersymmetric theories, the Higgs boson masses are calculated from the input parameters. Moreover, to be compatible with phenomenology, higher-order corrections have to be included in their derivation. Experimental analyses on the other hand resort to benchmarks with specific mass values. Given the large number of input parameters in the proposed supersymmetric extension, such as the...

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  55. 113. CP violation in the Higgs sector: Run 3 and beyond (19'+3')
    Henning Bahl (ITP Heidelberg)
    04/12/2025, 14:00
  56. 150. Higgs decays in the SMEFT at NLO (19'+3')
    Matthew Forslund (Princeton Center for Theoretical Science)
    04/12/2025, 14:22
  57. 151. SMEFT, Anomalous Couplings and CPV from CMS and ATLAS (19'+3')
    Daniel Winterbottom (Imperial College)
    04/12/2025, 14:44
  58. 152. Summary from the Higgs coupling measurements (Run 2 summary and available results from Run 3) from ATLAS and CMS (19'+3')
    Serhat Ordek (Deutsches Elektronen-Synchrotron)
    04/12/2025, 15:05
  59. 98. ATLAS HH experimental overview (20'+5')
    Valentina Cairo (CERN)
    04/12/2025, 16:00
  60. 99. CMS HH experimental overview (20'+5')
    Jin Wang (Chinese Academy of Sciences)
    04/12/2025, 16:25
  61. 100. Summary of the HHH workshop in Dubrovnik (12'+3')
    Greg Landsberg (Brown University)
    04/12/2025, 16:50
  62. 101. NNLO+PS HH production with top-quark mass corrections in GENEVA (12'+3')
    Giulia Marinelli (DESY)
    04/12/2025, 17:10
  63. 158. ttH (17'+5')
    Sebastian Wuchterl (CERN)
    05/12/2025, 09:00
  64. 159. Off-shell (17'+5')
    Raoul Horst Rontsch (University of Milan and INFN, Milan)
    05/12/2025, 09:22
  65. 173. Report 5 cross-section summary (15'+15')
    Alexander Karlberg (University of Oxford)
    05/12/2025, 09:44
  66. 142. Updates from PDF global fits (20'+10') [remote]
    Robert Samuel Thorne (University College London)
    05/12/2025, 11:00
  67. 169. Path for deriving uncertainties for STXS 1.3 (10'+15') [remote]
    Sarah Heim (Deutsches Elektronen-Synchrotron)
    05/12/2025, 11:30
  68. 170. H+HF/Hbb across WG3 and WG4 (15'+5')
    Elena Mazzeo (CERN), Stefano Manzoni (CERN)
    05/12/2025, 11:55
  69. 143. Higgs physics at Future Colliders (20'+10')
    Andrea Sciandra (Brookhaven National Laboratory)
    05/12/2025, 12:15
  70. 137. [WG1] ttH NNLO+PS (7'+3')
    Christian Biello (ETH Zurich)
    05/12/2025, 14:00
  71. 138. [WG1] Two-loop QCD corrections to ZH and off-shell Z boson pair production in gluon fusion (7'+3')
    Dominik Grau (KIT)
    05/12/2025, 14:10

    https://arxiv.org/pdf/2509.07072

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  72. 139. [WG1] gg→ZH : updated predictions at NLO QCD including SMEFT contributions (7'+3')
    Benjamin Campillo Aveleira (KIT), Gudrun Heinrich (KIT)
    05/12/2025, 14:20
  73. 172. [WG1] H+c/H+b associated production (7'+3')
    Tiziano Bevilacqua (University of Zürich)
    05/12/2025, 14:30
  74. 140. [WG2] CPV benchmarks (7'+3')
    Rui Santos (ISEL and CFTC-UL)
    05/12/2025, 14:40
  75. 141. [WG3] Charged Higgs Pairs at the LHC: A NLO Analysis (7'+3')
    Lisa Biermann (PSI)
    05/12/2025, 14:50
  76. 156. [WG4] BSM benchmarks and interference effects (7'+3') [remote]
    Kateryna Radchenko Serdula (DESY)
    05/12/2025, 15:00
  77. 149. [WG4] ggF HH QCD and EW higher-order corrections and theory uncertainties (7'+3')
    Marco Bonetti (Eberhard Karls Universität Tübingen)
    05/12/2025, 15:10
  78. 144. WG1 Higgs XS&BR: Outlook and Plans (10'+5') [remote]
    Alessandro Calandri (Università & INFN, Firenze)
    05/12/2025, 16:00
  79. 145. WG2 Higgs Properties: Outlook and Plans (10'+5')
    Jelena Jovicevic (Institute of Physics, University of Belgrade)
    05/12/2025, 16:15
  80. 146. WG3 BSM Higgs: Outlook and Plans (10'+5')
    Rui Santos (ISEL and CFTC-UL)
    05/12/2025, 16:30
  81. 147. WG4 HH and multi-Higgs: Outlook and Plans (10'+5')
    Arantxa Ruiz Martinez (Univ. of Valencia and CSIC)
    05/12/2025, 16:45
  82. 148. Closing words from the Steering Committee (10'+5')
    Gaetano Barone (Brown University)
    05/12/2025, 17:00
  83. 136. [WG1] gg→ZH : updated predictions at NLO QCD including SMEFT contributions (7'+3')
  84. 134. [WG1] ttH NNLO+PS (7'+3')
  85. 135. [WG1] Two-loop QCD corrections to ZH and off-shell Z boson pair production in gluon fusion (7'+3')
  86. 91. Direct probes of the quartic Higgs self-coupling (15'+3')
    Gilberto Tetlalmatzi-Xolocotzi (Siegen University)
  87. 131. Off-Shell
  88. 130. VH
    Suman Chatterjee (Deutsches Elektronen-Synchrotron (DE))