LHC Forward Physics December 2025 Workshop

11 Dec 2025, 09:00 → 12 Dec 2025, 18:20 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Christophe Royon (The University of Kansas (US)), Clara Elisabeth Leitgeb (Humboldt University of Berlin (DE)), Karel Cerny (Palacky University (CZ)), Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

The 11-12 December 2025 two-day workshop of the LHC Physics Centre at CERN (LPCC) Forward Physics Working Group provides a forum at CERN for experimental collaborations and theorists to meet and exchange latest results across all topics of forward physics at the LHC.  We will discuss the project of writing a CERN Yellow Report about our activities and prospects for high lumi LHC and beyond.

Forward physics is a diverse program at the LHC that requires innovative instrumentation and unique techniques to measure high-rapidity particles missed by standard central detectors. Special instrumentation ranges from near-beam spectrometers to zero degree calorimeters. Recent results have witnessed a remarkable breadth of advances underscoring the creativity of this community:

• definitive elastic scattering measurements, 
• nonperturbative dynamics of the strong force,
• forward proton and neutron scattering,
• photon fusion production,
• collider neutrino measurements,
• searches for prompt and long-lived particles beyond the Standard Model,
• synergies with cosmic-ray observatories.

These developments open future opportunities to develop in exciting new directions.

This series of inter-experiment workshops provides a regular exchange of latest LHC results, ideas and techniques between experimentalists and theorists, sharpening open questions to chart future developments. We are a vibrant international community drawn to the richness of forward physics, where newcomers and early-career researchers are especially welcome to showcase their science.

 

Thursday 11 December

13:30 → 13:40 Welcome

Speakers: Christophe Royon (The University of Kansas (US)), Clara Elisabeth Leitgeb (Humboldt University of Berlin (DE)), Karel Cerny (Palacky University (CZ)), Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

13:40 → 14:10 New TOTEM results at 900 GeV

Speaker: Frigyes Janos Nemes (CERN (also at Wigner RCP Budapest, Hungary))

LHC_Forward_Physics_F_Nemes_v1.pdf

14:10 → 14:40 FSC detector for RUN1 and legacy for Run 3.

Speakers: Sorina Popescu (F), Sorina Popescu (Universität Münster (DE))

LHCForwardPhysics2025-SP.pdf

14:40 → 15:10 FSC status and data taking in CMS

Speaker: Michael Pitt (CERN)

physics_with_FSC.pdf

15:10 → 15:40 Coffee break

15:40 → 16:10 On the Possibility of Having Roman Pots around IP1/5, IP2 and IP8 in Run 5

Speaker: Maciej Trzebinski (Polish Academy of Sciences (PL))

Trzebinski_Pots_HLLHC.pdf

16:10 → 16:40 Exclusive diffractive production of dijets in deep inelastic lepton-nucleon scattering

Speaker: Mr Trambak Jyoti Chall (University of Rzeszów)

Trambak_LhcFwdDec25.pdf

16:40 → 17:10 Right handed neutrino searches from Z’ in forward search experiments

Speakers: Arindam Das, Arindam Das (Hokkaido University), Arindam Das (Saha Institute of Nuclear Physics (IN)), Arindam Das (Osaka University)

ADas_Forward_Physics.pdf

17:10 → 17:55 Discussion: special runs in 2026 and beyond

Speaker: Michael Pitt (CERN)

special_runs_2026.pdf

Friday 12 December

13:30 → 14:00 LHCb UPC results

Speaker: Ronan Mcnulty (University College Dublin (IE))

Foward_physics_mcnulty.pdf

14:00 → 14:30 Testing saturation at the LHC using charm and beauty data

Speaker: Christophe Royon (The University of Kansas (US))

lhcfwd_1225.pdf

14:30 → 15:00 Massive vector meson production with high momentum exchange in semi-exclusive collisions

Speaker: João Vitor Bulhões da Silva

LHC_Forward_Physics_WG_meeting (1).pdf

15:00 → 15:30 Coffee break

15:30 → 16:00 pO data taking for LHCf

Speakers: Eugenio Berti (Universita e INFN, Firenze (IT)), Menjo Hiroaki

EBerti_ForwardPhysicsDecember2025.pdf

16:00 → 17:00 Discussion about CERN yellow report on forward physics

lhcfwd_121225.pdf

17:00 → 17:10 Workshop conclusion

Speakers: Christophe Royon (The University of Kansas (US)), Clara Elisabeth Leitgeb (Humboldt University of Berlin (DE)), Karel Cerny (Palacky University (CZ)), Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))