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9th Forward Physics Facility Meeting

5–6 Mar 2026
CERN
Europe/Zurich timezone

Luis Anchordoqui, Jamie Boyd, Albert De Roeck, Jonathan Feng, Felix Kling, Juan Rojo

Contribution List

35 out of 35 displayed
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  1. 14. Opening Remarks by Organizers
    Alan Barr (University of Oxford (GB)), Brian Thomas Batell, Felix Kling (DESY), Juan Salvador Tafoya Vargas (University of California Davis (US))
    05/03/2026, 09:00
  2. 15. Opening Remarks
    Urs Wiedemann (CERN)
    05/03/2026, 09:15
  3. 36. European Strategy Update
    Matthew Philip Mccullough (CERN)
    05/03/2026, 09:30
  4. 16. New Results from FASER/SND
    Dr Umut Kose (ETH-Zurich)
    05/03/2026, 09:45
  5. 17. FPF Implications and Opportunities for BSM and Neutrino Physics
    Ryan Plestid (CERN)
    05/03/2026, 10:10
  6. 18. FPF Implications and Opportunities for QCD and Astroparticle
    Dr Tanguy Pierog
    05/03/2026, 10:35
  7. 32. Update on Facility
    Julien Prosic
    05/03/2026, 11:30
  8. 34. Update on Civil Engineering
    Tamara Alice Bud (CERN)
    05/03/2026, 12:00
  9. 1. Right handed neutrino production from $Z^\prime$ interactions in forward search experiments
    Arindam Das (Hokkaido University)
    05/03/2026, 14:30

    We study two general $U(1)$ extensions of the Standard Model (SM) those generate tiny neutrino masses via the seesaw mechanism after general $U(1)$ breaking. These models predict a new neutral gauge boson ($Z'$) and right-handed neutrinos (RHNs), the latter introduced for anomaly cancellation and neutrino mass generation. In both scenarios, left- and right-handed fermions couple differently...

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  10. 4. Transverse-momentum distributions in neutrino-nucleon scattering
    Mattia Bellotti (Università di Cagliari)
    05/03/2026, 14:30

    One of the main goals of physics is to understand the inner structure of matter. To achieve this result, studying the composition of protons and neutrons (nucleons) is essential. In nonperturbative QCD the internal structure of nucleons can be described in terms of parton distribution functions (PDF). PDFs can in turn be investigated using deep-inelastic-scattering processes...

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  11. 12. Long-lived particle searches Beyond B meson
    Wei Su (Sun Yat-sen University)
    05/03/2026, 14:50

    In this talk I will show our recent study about the LLP searches af FASER. There are two kinds of modes, with the production from the usual mesons, and from the PP collision directly.

    For the meson production mode, we study the prospect of detecting light CP-even and CP-odd scalars. We develop the general formalism for the scalar production and decay from mesons at LHC, given modified...

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  12. 6. The First Determination of the LHC Neutrino Fluxes from FASER Data
    Jelle Koorn (Nikhef National institute for subatomic physics (NL))
    05/03/2026, 14:50

    The recent detection of TeV neutrinos at FASER has launched a new era of collider physics. Measuring the flavor, energy and rapidity of these neutrinos allows for an unprecedented extraction of the full energy-dependence of far-forward neutrino production in p-p collisions. Analogous to PDF extractions from collider data, we determine the energy distribution of the (anti) muon neutrino flux at...

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  13. 9. Latest neutrino results from the FASER experiment and their implications for cosmic ray physics
    Ken Ohashi (Universitaet Bern (CH))
    05/03/2026, 15:10

    The muon puzzle --- an excess of muons relative to simulation predictions in ultra-high-energy cosmic-ray air showers --- has been reported by many experiments.
    This suggests that forward particle production in hadronic interactions is not fully understood.
    Some of the scenarios proposed to resolve this predict reduced production of forward neutral pions and enhanced production of forward...

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  14. 2. Single Photon Signature of Light Long-Lived Particles
    Herbi Dreiner
    05/03/2026, 15:10

    We have investigated single photon signatures of a light long-lived neutralino in supersymmetric models with broken R-parity. We consider the sensitivities at the detectors: ANUBIS, CODEXb, FACET, FASER, MAPP, MATHUSLA.

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  15. 8. Exploring Neutrino Compositeness: Emerging and Invisible Jets at Neutrino and Charged Lepton Beams
    Matteo Borrello (University of Florence, INFN of Florence)
    05/03/2026, 15:30

    The origin of neutrino masses suggests the existence of a sterile neutrino sector, which may be either too heavy or too weakly coupled to the Standard Model (SM) to be detected in the near future. The inverse seesaw mechanism provides a testable framework where the coupling between the sterile sector and the SM is large enough to allow direct experimental probes. In this context, it is crucial...

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  16. 10. Tau tridents at accelerator neutrino facilities
    Diego Lopez Gutierrez (Washington University in St Louis)
    05/03/2026, 15:30

    We present the first detailed study of Standard Model neutrino tridents involving tau leptons at the near detectors of accelerator neutrino facilities. The rates of these processes were previously thought to be negligible, even at future facilities. Our full $2\to4$
    calculation, including both coherent and incoherent scatterings, reveals that the DUNE near detector could observe a...

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  17. 30. Characterizing Heavy Neutral Leptons: Measuring Parameters, Discriminating Majorana versus Dirac, and Using FASER2 as a Trigger for ATLAS
    Daniel La Rocco
    05/03/2026, 16:00

    Heavy Neutral Leptons (HNLs) are a well-motivated extension of the Standard Model which may provide explanations for observed neutrino masses, dark matter, and baryogengesis via leptogenesis. In the event that a HNL signal is actually detected, much work will be dedicated to identifying the underlying nature of the observed signal excess. In this talk, we will use Monte-Carlo simulations of...

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  18. 7. Muon trident process at FASER$\nu$ and FASER$\nu$2 detectors
    Gabriel Rabelo-Soares
    05/03/2026, 16:00

    The electromagnetic production of a dilepton pair in the muon - ion scattering, usually denoted as muon trident process, is investigated considering the feasibility of studying processes induced by muons at LHC using FASER$\nu$ and FASER$\nu$2 detectors. The total and differential cross - sections are estimated taking into account of the Bethe-Heitler and bremsstrahlung channels, and...

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  19. 5. Anti-Electron Neutrinos: Identification Strategies and Physics Potential
    Dr Toni Makela (University of California, Irvine)
    05/03/2026, 16:20

    Most existing and proposed high energy neutrino experiments have excellent muon charge identification capabilities, enabling the distinction of $\nu_\mu$ and $\bar \nu_\mu$ charged current interactions. In contrast, distinguishing electrons and positrons from $\nu_e$ and $\bar \nu_e$ interactions is typically impossible, as they quickly interact within dense detector materials and do not reach...

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  20. 11. Spin Correlations in Dark Photon Searches
    Misa Toman
    05/03/2026, 16:20

    We investigate the spin correlations between production and decay in the process where dark photons $A'$ are produced in pseudoscalar meson decays, for example, $\pi^0, \eta \to \gamma A'$, and then decay to fermion pairs, $A' \to f \bar{f}$. This process is the focus of many experimental searches, but spin correlations are typically ignored. We derive analytic results that allow us to...

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  21. 13. Millicharged Particles with FORMOSA via Forward Neutron-Induced Showers at the LHC
    Peiran Li (University of Minnesota)
    05/03/2026, 16:40

    We study the sensitivity of the FORMOSA experiment at the LHC Forward Physics Facility to millicharged particles (mCPs), focusing on a previously unexplored production mechanism associated with the forward neutron flux. Existing studies mainly consider mCP production from forward mesons directly produced in pp collisions.
    We point out that pp collisions also generate an intense flux of...

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  22. 31. Simulated Neutrino Fluxes at the Forward Physics Facility
    Isabella Coronado
    05/03/2026, 16:40

    Measurements of neutrino fluxes at the Forward Physics Facility can be used to study predictions of hadronic interaction models. These advancements are critical for astroparticle physics, linking forward scattering processes to extensive air showers and improving our understanding of cosmic-ray interactions. This work investigates simulated neutrino fluxes at the FPF, focusing in particular on...

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  23. 3. Cosmic Millicharged Background, Reheating, and Arithmetica Electrōrum
    Yu-Dai Tsai (University of California, Irvine)
    05/03/2026, 17:00

    We demonstrate that the searches for dark sector particles can provide probes of reheating scenarios, focusing on the cosmic millicharge background produced in the early universe. We discuss two types of millicharge particles (mCPs): either with, or without, an accompanying dark photon. These two types of mCPs have distinct theoretical motivations and cosmological signatures. We discuss...

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  24. 33. Testing hadronic interaction models in the far forward direction using simulations of muon fluxes at FASER
    Kemuel Cullimore (University of Utah)
    05/03/2026, 17:00

    Our goal is to constrict hadronic interaction models in the far-forward region. To do this, we produce simulations of the muon fluxes produced from the decay of different hadrons using BDSIM with different event generators. We will present studies of the energy spectra and x-y position of the muon flux at FASER for different parent particles to constrain various hadronic interaction models.

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  25. 19. Adventures of a theorist with neutrino experiments - old & new
    Prof. Subir Sarkar (University of Oxford)
    06/03/2026, 09:00
  26. 29. New results from MilliQan
    Juan Salvador Tafoya Vargas (University of California Davis (US))
    06/03/2026, 09:30
  27. 26. FORMOSA
    Jacob Henry Steenis (University of California Davis (US)), Jacob Steenis
    06/03/2026, 10:00
  28. 28. Sweeper Magnet
    Kohei Chinone (Chiba University (JP))
    06/03/2026, 11:00
  29. 25. FASER2
    Josh McFayden (University of Sussex)
    06/03/2026, 11:20
  30. 24. FASERv2
    Elena Firu (Institute of Space Science subsidiary of INFLPR (RO))
    06/03/2026, 11:50
  31. 27. FLARE
    Matteo Vicenzi (Brookhaven National Laboratory (US))
    06/03/2026, 14:00
  32. 20. Muon DIS at the FPF
    Peter Krack, Peter Krack (Nikhef National institute for subatomic physics (NL)), Peter Krack
    06/03/2026, 14:30
  33. 21. Neutrino Physics at a Muon Collider
    Zahra Tabrizi (University of Pittsburgh (US))
    06/03/2026, 15:00
  34. 22. Discussion: Collaboration Structure and Project Management
    06/03/2026, 16:00
  35. 23. Discussion: Budget, Timeline, Funding, Integration, European Strategy
    Jonathan Lee Feng (University of California Irvine (US))
    06/03/2026, 16:45