The 21st Workshop of the LHC Higgs Working Group

Name: The 21st Workshop of the LHC Higgs Working Group
Start: 2024-12-04T09:00:00+01:00
End: 2024-12-06T17:30:00+01:00
Location: No location set

4–6 Dec 2024

Europe/Zurich timezone

LHC Higgs WG Steering Committee

lhc-higgs-steering-committee@cern.ch

Contribution List

44. Workshop opening

04/12/2024, 09:00

Opening and joint LHC EFT / LHC Higgs plenary

64. EFT/Higgs Experimental Summary

Tae Hyoun Park (Max-Planck Institute for Physics)

04/12/2024, 09:30

Opening and joint LHC EFT / LHC Higgs plenary

65. EFT Meets Cosmology

Johan Löfgren (Uppsala)

04/12/2024, 10:00

Opening and joint LHC EFT / LHC Higgs plenary

66. STXS Predictions

Ken Mimasu (University of Southampton)

04/12/2024, 11:00

Joint LHC EFT / LHC Higgs plenary

67. STXS Interpretation of VH(bb)

Alessandro Calandri (ETH Zuerich)

04/12/2024, 11:15

Joint LHC EFT / LHC Higgs plenary

68. Running Effects in Higgs SMEFT

Stefano Di Noi (Università and INFN, Padova)

04/12/2024, 11:35

Joint LHC EFT / LHC Higgs plenary

69. SMEFiT

Luca Mantani (DAMTP, University of Cambridge)

04/12/2024, 11:55

Joint LHC EFT / LHC Higgs plenary

70. SMEFT/Higgs Experimental Outlook

Giacomo Boldrini (LLR Palaisau - CNRS)

04/12/2024, 12:15

Joint LHC EFT / LHC Higgs plenary

2. Introduction

Alessandro Calandri (ETH Zuerich), Alexander Karlberg (CERN), Bernhard Mistlberger (SLAC), Hannah Arnold (Stony Brook)

04/12/2024, 14:00

Plenary (WG1)

3. ggF status report (17'+5')

04/12/2024, 14:10

Plenary (WG1)

4. VBF status report (17+5')

Jiayi Chen (Simon Fraser University)

04/12/2024, 14:32

Plenary (WG1)

5. VH status report (15'+7')

Matthew Lim (University of Sussex)

04/12/2024, 14:54

Plenary (WG1)

20. MSSM working group summary

Emanuele Angelo Bagnaschi (INFN Frascati)

04/12/2024, 16:00

Plenary (WG3)

21. bbH: subgroup report and NNLO+PS generators in the massless and massive schemes

Christian Biello (Max-Planck Institute for Physics)

04/12/2024, 16:18

Plenary (WG3)

We provide an update on the status of Higgs production in association with a bottom-quark pair, highlighting recent developments by the bbH subgroup. We discuss the differences between the two flavour schemes and their state-of-the-art predictions, including cross-section interpolations for 13.6 TeV. Additionally, we report on novel event generators developed in the massless and massive scheme...

22. NMSSM subgroup report

Milada Margarete Muehlleitner (KIT)

04/12/2024, 16:36

Plenary (WG3)

23. Exotic decays subgroup: Axion-like particle connections to the Higgs and top

Anke Biekoetter (JGU Mainz)

04/12/2024, 16:54

Plenary (WG3)

24. Extended scalar sector subgroup report

Khawla Jaffel (University of Science and Technology of China)

04/12/2024, 17:12

Plenary (WG3)

54. Exotic decays of Higgs bosons to ALPS (ATLAS and CMS) (20'+5')

Dominique Trischuk (Brandeis University)

05/12/2024, 09:00

WG2 parallel session

52. Exotic Higgs decays in CMS

Lakshmi Pramod (DESY)

05/12/2024, 09:00

WG3 parallel session

29. Introduction

05/12/2024, 09:00

WG4 parallel session

49. yt-induced Hbb as a background for HH searches (10'+10')

Marco Zaro (Università degli Studi and INFN Milano)

05/12/2024, 09:00

WG1 parallel session

38. Triple Higgs searches in ATLAS

05/12/2024, 09:10

WG4 parallel session

51. Rare and exotic Higgs decays in ATLAS

Diallo Boye (Brookhaven National Laboratory)

05/12/2024, 09:18

WG3 parallel session

31. Higgs+charm ATLAS (10'+10')

Elliot Reynolds (University of Kansas)

05/12/2024, 09:20

WG1 parallel session

55. A log story short: running contributions to radiative Higgs decays in SMEFT (20'+5')

Guilherme Guedes (DESY)

05/12/2024, 09:25

WG2 parallel session

40. Triple Higgs searches in CMS [tbc]

05/12/2024, 09:30

WG4 parallel session

63. LLPs from Exotic Higgs decays using faraway sub-detectors

Nathan Grieser (University of Cincinnati)

05/12/2024, 09:36

WG3 parallel session

32. Higgs+charm CMS (10'+10')

Tiziano Bevilacqua (University of Zuerich)

05/12/2024, 09:40

WG1 parallel session

56. Interference Effects in gg→H→Zγ Beyond Leading Order (20'+5') [remote]

Federico Buccioni (Technical University of Munich)

05/12/2024, 09:50

WG2 parallel session

39. Overview of triple Higgs theory

Tania Natalie Robens (Rudjer Boskovic Institute)

05/12/2024, 09:50

WG4 parallel session

45. Higgs Mass Predictions in the CP-Violating High-Scale NMSSM

Christoph Borschensky (KIT)

05/12/2024, 09:54

WG3 parallel session

In a supersymmetric theory, large mass hierarchies can lead to large uncertainties in fixed-order calculations of the SM-like Higgs mass. A reliable prediction is then obtained by performing the calculation in an effective field theory (EFT) framework, involving the matching to the full supersymmetric theory at the high scale to include contributions from the heavy particles, and a subsequent...

33. ttHbb highlights/summary of the WG1 - ttH/tH workshop (10'+10')

Matthias Schroeder (University of Hamburg)

05/12/2024, 10:00

WG1 parallel session

WG1 ttH/tH workshop: https://indico.cern.ch/event/1440845/

46. Recent developments in NMSSMCALC

Martin Gabelmann (DESY)

05/12/2024, 10:12

WG3 parallel session

Supersymmetry is among the most promising BSM frameworks solving many of the SM's theoretical and experimental shortcomings as well as providing a rich phenomenology across all sectors of the theory. The Next-to-Minimal-Supersymmetric-Standard-Model (NMSSM) is a natural successor of minimal supersymmetry providing a richer phenomenology in many regards such as e.g. more sources of...

41. Multi-Higgs Production and the Electroweak Phase Transition

Osama Karkout (Nikhef)

05/12/2024, 10:20

WG4 parallel session

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...

34. Updated ttHbb results ATLAS (10'+10')

Alexander Froch (Université de Genève)

05/12/2024, 10:20

WG1 parallel session

57. CP-sensitive observables in STXS ttH cross sections (20'+5')

Alberto Carnelli (IRFU Saclay - CNRS)

05/12/2024, 10:35

WG2 parallel session

42. Effect of anomalous HHH and ZZHH couplings on the decay width of H --> 4l [remote]

Biswajit Das (The Institute of Mathematical Sciences, Chennai)

05/12/2024, 10:40

WG4 parallel session

Despite the discovery of the Higgs boson, the Higgs sector of the standard model is still not fully established. In particular, the self-couplings of the Higgs boson and its couplings with gauge bosons are still to be fully determined. We consider electroweak corrections to the processes H --> ve ve~ vm vm~ and H --> e+ e- mu+ mu-. The corrections depend on the HHH coupling. We investigate...

35. VHcc ATLAS+CMS focusing on modelling uncertainties (20'+10')

Zhuoran Feng (Nikhef)

05/12/2024, 10:40

WG1 parallel session

48. MSSM Higgs boson production via gluon fusion

Michael Spira (Paul Scherrer Institute)

05/12/2024, 10:50

WG3 parallel session

43. Double Higgs production in vector boson fusion at NLO QCD with anomalous couplings

Jens Braun (KIT)

05/12/2024, 11:00

WG4 parallel session

We present a calculation of the NLO QCD corrections to Higgs boson pair production in vector boson fusion, combined with the leading operators parametrising anomalous interactions in non-linear Effective Field Theory (HEFT). Based on our Monte Carlo implementation using GoSam+Whizard, we investigate the effects of anomalous Higgs couplings on various observables.

59. Probing CPV with DPhijj in H->WW (ATLAS) (20'+5')

Cameron Clarry (University of Toronto)

05/12/2024, 11:00

WG2 parallel session

61. Updates on charged Higgs cross sections

Emanuele Angelo Bagnaschi (INFN Frascati)

05/12/2024, 11:08

WG3 parallel session

36. VHbb ATLAS+CMS focusing on modelling uncertainties (20'+10')

Christina Reissel (MIT)

05/12/2024, 11:10

WG1 parallel session