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
- Novel searches for long-lived or invisible particles 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 1
    
    Intro
    
    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
  - 2
    
    Search for Charged LLPs at FCC-ee
    
    Speaker: Soumyaa Vashishtha (Deutsches Elektronen-Synchrotron (DE))
    
    LLP_FCC_BSM.pdf
  - 3
    
    Invisible B decays
    
    Speaker: Ella Wood (University of Cambridge (GB))
    
    B2Inv_FCC_BSM_Sept_2026.pdf
  - 4
    
    Photon reconstruction with ALLEGRO
    
    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
  - 5
    
    Invisible particles with charm
    
    Speaker: Dominik Suelmann (Technische Universität Dortmund)
    
    2026_BSM_at_FCCee_Suelmann.pdf
  - 10:50
    
    Coffee break
  - 6
    
    Higgs portal to a strongly interacting dark sector
    
    Speakers: Emre Sitti (Universität Zürich), Emre Sitti
    
    BSMFCCee26.pdf
  - 7
    
    Signature-based searches for displaced decays at FCC-ee: status, detector requirements and wishlist
    
    Speaker: Juliette Alimena (DESY)
    
    DisplacedSignatures_FCCBSMWorkshop_23Sept2026.pdf
  - 8
    
    LLPs - theory and connections to cosmology
    
    Speaker: Giovanna Cottin (Pontificia Universidad Católica de Chile (CL))
    
    LLPsCosmo_CERN_GCOTTIN.pdf
- 12:20
  
  Lunch break
- 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
  - 9
    
    Higgs CP violation
    
    Speakers: Jay Nesbitt, Jay Nesbitt (University of Glasgow (GB))
    
    JN-CPV-HVV-FCCBSM-20260923.pdf
  - 10
    
    t channel DM models
    
    Speaker: Nudžeim Selimović (INFN Padova)
    
    BSM_FCCee_Selimovic.pdf
  - 11
    
    Fractionally charged particles
    
    Speakers: Seth Koren (University of Notre Dame), Seth Koren, Seth Koren
    
    Koren_FCP_FCC-ee.pdf
  - 12
    
    Brainstorming on new observables
    
    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
  - 13
    
    Flavour for BSM
    
    Speakers: Gino Isidori (University of Zurich (CH)), Gino Isidori (Unknown), Gino Isidori (University of Zurich (CH))
    
    FCCee-BSM-Flav.pdf
  - 14
    
    Cross-talk - FCC-hh
    
    Speaker: Sarah Louise Williams (University of Cambridge (GB))
    
    2026-09-23_FCChh_BSBcrosstalk-3.pdf
- 17:30
  
  Informal buy-your-own drinks at R1
Thursday 24 September
- Scalars and dark photons 40/S2-C01 - Salle Marie Sklodowska-Curie
  
  40/S2-C01 - Salle Marie Sklodowska-Curie
  
  CERN
  
  115
  Show room on map
  - 15
    
    Real scalar singlet
    
    Speaker: Simone Tentori (UCLouvain)
    
    FCCee_BSM_tentori.pdf
  - 16
    
    A Map of the $\kappa_V - \kappa_\lambda$ Parameter Space
    
    Speaker: Olivia Simon
    
    BSMatFCCee2026.pdf
  - 17
    
    2 loop running
    
    Speaker: Anders Eller Thomsen (University of Bern)
    
    BSM_at_FCC-ee_2026.pdf
  - 18
    
    2HDMs with FOPTs
    
    Speaker: Christoph Englert (The University of Manchester (GB))
    
    2026_CERN_ee.pdf
  - 10:50
    
    Coffee break
  - 19
    
    Dark photon to electron
    
    Speakers: Rohan Rajagopalan, Rohan Sudarshan Rajagopalan (Syracuse University (US))
    
    FCC_BSMworkshop_DPee.pdf
  - 20
    
    Dark photon in Higgs decays
    
    Speaker: Axel Gallen (Uppsala University (SE))
    
    DarkPhotons_FCCbsmWS_2026_AxelG.pdf
  - 21
    
    LLP searches at the FCCee using timing
    
    Speaker: Yansong Huang (University of California Davis (US))
    
    LLP_jet_timing.pdf
    
    LLP_jet_timing.pptx
- 12:30
  
  Lunch break
- Heavy Neutral Leptons (HNLs) 40/S2-C01 - Salle Marie Sklodowska-Curie
  
  40/S2-C01 - Salle Marie Sklodowska-Curie
  
  CERN
  
  115
  Show room on map
  - 22
    
    HNL theory
    
    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
  - 23
    
    HNL experiment
    
    Speaker: Giacomo Polesello (INFN, Sezione di Pavia (IT))
    
    fcc_hnl_bsm26.pdf
  - 24
    
    Semileptonic HNL decays in fullsim
    
    Speaker: Andrea Pareti (Pavia University and INFN (IT))
    
    HNLsFCCSemileptonic_Apareti.pdf
  - 25
    
    LLP in muons
    
    Speaker: Mahmoud AlThakeel (CERN)
    
    BSM@FCC-ee_workshop.pdf
  - 15:20
    
    Coffee break
  - 26
    
    Discussion: Higgs and HNL, can we define an ideal run plan?
    
    Speaker: Alain Blondel (Centre National de la Recherche Scientifique (FR))
    
    AB-sterile-neutrinos-BSM-2026.pdf
    
    AB-sterile-neutrinos-BSM-2026.pptx
- 19:30
  
  Informal social dinner - Cafe de La Place, Meyrin
  
  https://www.pizzeria-restaurant-laplace.ch/
Friday 25 September
- Axion-like particles (ALPs) 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 27
    
    ALPs intro + theory
    
    Speaker: Sophie Alice Renner (University of Glasgow (GB))
    
    ALPsFCCee.pdf
  - 28
    
    ALPs beyond Z-pole
    
    Speaker: Anna Patricia Przybyl (Deutsches Elektronen-Synchrotron (DE))
    
    FCCee BSM workshop.pdf
  - 29
    
    Higgs ALPs to 4 kaons
    
    Speaker: Sarah Alshamaily (Karlsruhe Institute of Technology)
    
    sep25_2026_bsm.pdf
  - 30
    
    ALPS into Leptons
    
    Speaker: Safa Naseem (New York University Abu Dhabi (AE))
    
    Axion_searches_in_the_dimuon_channel_at_FCC_ee.pdf
  - 10:50
    
    Coffee break
  - 31
    
    ALPS via Dark Higgs
    
    Speaker: Reza Jafari (University of Tehran (IR))
    
    Reza_BSMatFCC_25Sep2026.pdf
  - 32
    
    LFV alps
    
    Speakers: Marco Ardu (CNRS, LUPM and Univ. Valencia), Marco Ardu
    
    BSM_FCC_Ardu.pdf
- 12:00
  
  Lunch Break
- Indirect tests - NOTE EARLIER START TIME 500/1-001 - Main Auditorium
  
  500/1-001 - Main Auditorium
  
  CERN
  
  400
  Show room on map
  - 33
    
    Top-quark pair production sensitivity to heavy new physics at the FCC-ee
    
    Speaker: Jacopo De Piccoli (Universita e INFN, Padova (IT))
    
    ttbarEFTpresentationv6.pdf
  - 34
    
    Precision on and off Z pole
    
    Speaker: Alessandro Valenti (University of Basel)
    
    slides_AV.pdf
  - 35
    
    Heavy and not-so-heavy BSM at FCC-ee
    
    Speaker: Lukas Allwicher
    
    bsmatfcc_allwicher.pdf
  - 36
    
    How large can lepton mixing be?
    
    Speaker: CHIARA GIULIANO - (Universidad de Granada)
    
    howlargecanleptonmixingbe.pdf
  - 37
    
    Electroweak precision tests for asymptotic grand unification models
    
    Speakers: Christian Jean-Luc Verollet (Centre National de la Recherche Scientifique (FR)), Christian Verollet (IP2I Lyon)
    
    EWPO_SU5_aGUT.pdf
  - 38
    
    Closeout
    
    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

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