BSM at FCC-ee workshop

Name: BSM at FCC-ee workshop
Start: 2026-09-23T09:00:00+02:00
End: 2026-09-25T17:00:00+02:00
Location: CERN

23 Sept 2026, 09:00 → 25 Sept 2026, 17:00 Europe/Zurich

CERN

Giacomo Polesello (INFN, Sezione di Pavia (IT)), Joe Davighi, Rebeca Gonzalez Suarez (Uppsala University (SE)), Sophie Alice Renner (University of Glasgow (GB))

Description

This workshop, bringing together theorists and experimentalists, will cover the full scope of BSM physics at FCC-ee, including:

Direct discovery of light new physics (e.g. ALPs, dark photons, HNLs, dark sectors)
Indirect discovery potential of precision measurements (e.g. Z pole, Higgs couplings, top precision, off Z pole)

The workshop will be held in-person at CERN, with the option to join remotely on zoom.

The day before, there is a related workshop on physics at FCC-hh, which is likely to be of interest to many participants.

Contact organisers

conveners-bsm-fcc@cern.ch

Registration

Participants

176 View full list

64145085365

Rebeca Gonzalez Suarez

Join via phone

Wednesday 23 September
- 09:20 → 12:20
  Novel searches for long-lived or invisible particles 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 09:20
    
    Intro 10m
    
    Speakers: Giacomo Polesello (INFN, Sezione di Pavia (IT)), Joe Davighi (University of Cambridge (GB)), Rebeca Gonzalez Suarez (Uppsala University (SE)), Sophie Alice Renner (University of Glasgow (GB))
    
    BSM_FCCee_Sep26.pdf
  - 09:30
    
    Search for Charged LLPs at FCC-ee 20m
    
    Speaker: Soumyaa Vashishtha (Deutsches Elektronen-Synchrotron (DE))
    
    LLP_FCC_BSM.pdf
  - 09:50
    
    Invisible B decays 20m
    
    Speaker: Ella Wood (University of Cambridge (GB))
    
    B2Inv_FCC_BSM_Sept_2026.pdf
  - 10:10
    
    Photon reconstruction with ALLEGRO 20m
    
    Speakers: Jana Faltova (Charles University (CZ)), Jana Faltova (Charles University (CZ)), Matej Haviernik (Charles University (CZ)), Matej Haviernik (Charles University (CZ))
    
    ALLEGRO_BSMworkshop_23Sep2026.pdf
  - 10:30
    
    Invisible particles with charm 20m
    
    Speaker: Dominik Suelmann (Technische Universität Dortmund)
    
    2026_BSM_at_FCCee_Suelmann.pdf
  - 10:50
    
    Coffee break 30m
  - 11:20
    
    Higgs portal to a strongly interacting dark sector 20m
    
    Speakers: Emre Sitti (Universität Zürich), Emre Sitti
    
    BSMFCCee26.pdf
  - 11:40
    
    Signature-based searches for displaced decays at FCC-ee: status, detector requirements and wishlist 20m
    
    Speaker: Juliette Alimena (DESY)
    
    DisplacedSignatures_FCCBSMWorkshop_23Sept2026.pdf
  - 12:00
    
    LLPs - theory and connections to cosmology 20m
    
    Speaker: Giovanna Cottin (Pontificia Universidad Católica de Chile (CL))
    
    LLPsCosmo_CERN_GCOTTIN.pdf
- 12:20 → 14:00
  
  Lunch break 1h 40m
- 14:00 → 17:00
  Novel observables, signatures and cross-talk with other working groups 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 14:00
    
    Higgs CP violation 20m
    
    Speakers: Jay Nesbitt, Jay Nesbitt (University of Glasgow (GB))
    
    JN-CPV-HVV-FCCBSM-20260923.pdf
  - 14:20
    
    t channel DM models 20m
    
    Speaker: Nudžeim Selimović (INFN Padova)
    
    BSM_FCCee_Selimovic.pdf
  - 14:40
    
    Fractionally charged particles 20m
    
    Speakers: Seth Koren (University of Notre Dame), Seth Koren, Seth Koren
    
    Koren_FCP_FCC-ee.pdf
  - 15:00
    
    Brainstorming on new observables 20m
    
    Speaker: Joe Davighi (University of Cambridge (GB))
    
    Discussion_Observables_Sep26.pdf
    
    Google doc with notes from discussion - EDITABLE, PLEASE ADD YOUR THOUGHTS
  - 15:20
    
    Coffee break 30m
  - 15:50
    
    Flavour for BSM 30m
    
    Speakers: Gino Isidori (University of Zurich (CH)), Gino Isidori (Unknown), Gino Isidori (University of Zurich (CH))
    
    FCCee-BSM-Flav.pdf
  - 16:20
    
    Cross-talk - FCC-hh 20m
    
    Speaker: Sarah Louise Williams (University of Cambridge (GB))
    
    2026-09-23_FCChh_BSBcrosstalk-3.pdf
- 17:30 → 19:00
  
  Informal buy-your-own drinks at R1 1h 30m
Thursday 24 September
- 09:30 → 12:30
  Scalars and dark photons 40/S2-C01 - Salle Marie Sklodowska-Curie
  
  40/S2-C01 - Salle Marie Sklodowska-Curie
  
  CERN
  
  115
  Show room on map
  - 09:30
    
    Real scalar singlet 20m
    
    Speaker: Simone Tentori (UCLouvain)
    
    FCCee_BSM_tentori.pdf
  - 09:50
    
    A Map of the $\kappa_V - \kappa_\lambda$ Parameter Space 20m
    
    Speaker: Olivia Simon
    
    BSMatFCCee2026.pdf
  - 10:10
    
    2 loop running 20m
    
    Speaker: Anders Eller Thomsen (University of Bern)
    
    BSM_at_FCC-ee_2026.pdf
  - 10:30
    
    2HDMs with FOPTs 20m
    
    Speaker: Christoph Englert (The University of Manchester (GB))
    
    2026_CERN_ee.pdf
  - 10:50
    
    Coffee break 30m
  - 11:20
    
    Dark photon to electron 20m
    
    Speakers: Rohan Rajagopalan, Rohan Sudarshan Rajagopalan (Syracuse University (US))
    
    FCC_BSMworkshop_DPee.pdf
  - 11:40
    
    Dark photon in Higgs decays 20m
    
    Speaker: Axel Gallen (Uppsala University (SE))
    
    DarkPhotons_FCCbsmWS_2026_AxelG.pdf
  - 12:00
    
    LLP searches at the FCCee using timing 20m
    
    Speaker: Yansong Huang (University of California Davis (US))
    
    LLP_jet_timing.pdf
    
    LLP_jet_timing.pptx
- 12:30 → 14:00
  
  Lunch break 1h 30m
- 14:00 → 16:50
  Heavy Neutral Leptons (HNLs) 40/S2-C01 - Salle Marie Sklodowska-Curie
  
  40/S2-C01 - Salle Marie Sklodowska-Curie
  
  CERN
  
  115
  Show room on map
  - 14:00
    
    HNL theory 20m
    
    Speakers: Marco Drewes (Universite Catholique de Louvain (UCL) (BE)), Marco Drewes, Marco Drewes (Ecole Polytechnique Federale de Lausanne (EPFL))
    
    Drewes FCCee BSM CERN 2026 v2.pdf
  - 14:20
    
    HNL experiment 20m
    
    Speaker: Giacomo Polesello (INFN, Sezione di Pavia (IT))
    
    fcc_hnl_bsm26.pdf
  - 14:40
    
    Semileptonic HNL decays in fullsim 20m
    
    Speaker: Andrea Pareti (Pavia University and INFN (IT))
    
    HNLsFCCSemileptonic_Apareti.pdf
  - 15:00
    
    LLP in muons 20m
    
    Speaker: Mahmoud AlThakeel (CERN)
    
    BSM@FCC-ee_workshop.pdf
  - 15:20
    
    Coffee break 30m
  - 15:50
    
    Discussion: Higgs and HNL, can we define an ideal run plan? 1h
    
    Speaker: Alain Blondel (Centre National de la Recherche Scientifique (FR))
    
    AB-sterile-neutrinos-BSM-2026.pdf
    
    AB-sterile-neutrinos-BSM-2026.pptx
- 19:30 → 22:00
  
  Informal social dinner - Cafe de La Place, Meyrin 2h 30m
  
  https://www.pizzeria-restaurant-laplace.ch/
Friday 25 September
- 09:30 → 12:00
  Axion-like particles (ALPs) 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 09:30
    
    ALPs intro + theory 20m
    
    Speaker: Sophie Alice Renner (University of Glasgow (GB))
    
    ALPsFCCee.pdf
  - 09:50
    
    ALPs beyond Z-pole 20m
    
    Speaker: Anna Patricia Przybyl (Deutsches Elektronen-Synchrotron (DE))
    
    FCCee BSM workshop.pdf
  - 10:10
    
    Higgs ALPs to 4 kaons 20m
    
    Speaker: Sarah Alshamaily (Karlsruhe Institute of Technology)
    
    sep25_2026_bsm.pdf
  - 10:30
    
    ALPS into Leptons 20m
    
    Speaker: Safa Naseem (New York University Abu Dhabi (AE))
    
    Axion_searches_in_the_dimuon_channel_at_FCC_ee.pdf
  - 10:50
    
    Coffee break 30m
  - 11:20
    
    ALPS via Dark Higgs 20m
    
    Speaker: Reza Jafari (University of Tehran (IR))
    
    Reza_BSMatFCC_25Sep2026.pdf
  - 11:40
    
    LFV alps 20m
    
    Speakers: Marco Ardu (CNRS, LUPM and Univ. Valencia), Marco Ardu
    
    BSM_FCC_Ardu.pdf
- 12:00 → 13:40
  
  Lunch Break 1h 40m
- 13:40 → 15:55
  Indirect tests - NOTE EARLIER START TIME 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 13:40
    
    Top-quark pair production sensitivity to heavy new physics at the FCC-ee 20m
    
    Speaker: Jacopo De Piccoli (Universita e INFN, Padova (IT))
    
    ttbarEFTpresentationv6.pdf
  - 14:00
    
    Precision on and off Z pole 20m
    
    Speaker: Alessandro Valenti (University of Basel)
    
    slides_AV.pdf
  - 14:20
    
    Heavy and not-so-heavy BSM at FCC-ee 20m
    
    Speaker: Lukas Allwicher
    
    bsmatfcc_allwicher.pdf
  - 14:40
    
    How large can lepton mixing be? 20m
    
    Speaker: CHIARA GIULIANO - (Universidad de Granada)
    
    howlargecanleptonmixingbe.pdf
  - 15:00
    
    Electroweak precision tests for asymptotic grand unification models 20m
    
    Speakers: Christian Jean-Luc Verollet (Centre National de la Recherche Scientifique (FR)), Christian Verollet (IP2I Lyon)
    
    EWPO_SU5_aGUT.pdf
  - 15:20
    
    Closeout 5m
    
    Speakers: Giacomo Polesello (INFN, Sezione di Pavia (IT)), Joe Davighi (University of Cambridge (GB)), Rebeca Gonzalez Suarez (Uppsala University (SE)), Sophie Alice Renner (University of Glasgow (GB))
    
    BSM_FCCee_Sep26_close.pdf
  - 15:25
    
    Coffee Break 30m

BSM at FCC-ee workshop

CERN

500/1-001 - Main Auditorium

CERN

500/1-001 - Main Auditorium

CERN

40/S2-C01 - Salle Marie Sklodowska-Curie

CERN

40/S2-C01 - Salle Marie Sklodowska-Curie

CERN

500/1-001 - Main Auditorium

CERN

500/1-001 - Main Auditorium

CERN