LHC Working Group on Forward Physics and Diffraction

Contribution List

9. Welcome

Agustin Sabio Vera, Prof. Agustin Sabio Vera, Christophe Royon (The University of Kansas (US)), Jesse Liu (New York University), Karel Cerny (Palacky University (CZ)), Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

29/09/2025, 10:00

10. TMD extractions from global fits

Alexey Vladimirov, Alexey Vladimirov (Universidad Complutense de Madrid)

29/09/2025, 10:15

4. Exploring fragmentation into $T_{4Q}$ tetraquarks: Insights from the TQ4Q1.1 functions

Dr Francesco Giovanni Celiberto (UAH Madrid)

29/09/2025, 10:45

We present a phenomenological study of exotic fully heavy tetraquark production based on the TQ4Q1.1 set of collinear, variable-flavor-number-scheme fragmentation functions. Our analysis covers scalar ($0^{++}$), axial-vector ($1^{+-}$), and tensor ($2^{++}$) configurations, incorporating single-parton fragmentation at leading power within a nonrelativistic QCD factorization framework....

6. Energy-Energy correlators in back-to-back scattering

Alejandro Bris Cuerpo (Universidad Complutense Madrid - IPARCOS)

29/09/2025, 11:45

We study the possibilities of obtaining information on the non-perturbative part of the evolution of transverse momentum distributions from the back-to-back limit of energy-energy correlators.

The analysis is performed through a global fit to all available experimental data from $e^+e^-$ collisions, for which the highest order result ever achieved in perturbation theory can be used as input.

11. Formalism of power corrections with soft modes

IGNAZIO Scimemi (Universidad Complutense madrid), Ignazio Scimemi (Universidad Complutense (ES)), Ignazio Scimemi (Universidad Complutense (ES)), ignazio scimemi (Universidad Complutense Madrid)

29/09/2025, 12:15

12. Discussion

29/09/2025, 12:45

5. Inelastic production in ultraperipheral collisions

Dr Lucian Alexander Harland-Lang (University College London)

29/09/2025, 14:30

I will discuss the case of inelastic production in ultraperipheral collisions, namely photon-initiated production where one of the interacting ions emits a photon incoherently, leading to ion dissociation. I will present comparisons to data and discuss the background contribution to light-by-light scattering.

13. Measurements from the ALICE ZDC, in pp, pA and A-A collisions

Chiara Oppedisano (INFN Torino (IT))

29/09/2025, 15:00

14. UPC results from CMS

Luis Alcerro Alcerro (The University of Kansas (US))

29/09/2025, 16:00

15. Have we seen saturation in UPC data?

Christophe Royon (The University of Kansas (US))

29/09/2025, 16:30

16. The energy dependence of exclusive heavy vector meson photoproduction cross-sections and NLO BFKL evolution

Martin Hentschinski (Universidad de las Americas, Puebla)

29/09/2025, 17:00

17. Discussion

29/09/2025, 17:30

27. Entanglement and entropy production in e-P and P-P collisions

Krzysztof Kutak (Instytut Fizyki Jadrowej Polskiej Akademii Nauk), Krzysztof Marek Kutak (Polish Academy of Sciences (PL))

30/09/2025, 10:00

28. From Multiperipheral Models to BFKL Dynamics in Mueller–Navelet Jets

Dario Vaccaro (EPFL)

30/09/2025, 10:30

29. Forward proton detectors in HIN runs

Michael Pitt (CERN)

30/09/2025, 11:30

1. Overview of ATLAS forward proton detectors: status, performance and new physics results

Sergio Javier Arbiol Val (Polish Academy of Sciences (PL))

30/09/2025, 12:00

A key focus of the physics program at the LHC is the study of head-on proton-proton collisions. However, an important class of physics can be studied for cases where the protons narrowly miss one another and remain intact. In such cases, the electromagnetic fields surrounding the protons can interact producing high-energy photon-photon collisions. Alternatively, interactions mediated by the...

20. Discussion

30/09/2025, 12:30

21. Extracting the gluon density at the Electron-Ion Collider from F_L measurements

Javier Jiménez-López (University of Alcalá)

30/09/2025, 14:30

22. Leading qt/Q corrections in correction for Drell-Yan process in TMD factorization

Arturo Arroyo Castro (UCM)

30/09/2025, 15:00

23. Recent results from pO, OO, Ne Ne runs at the LHC

Dr Georgios Krintiras (The University of Kansas (US))

30/09/2025, 16:00

24. CMS ZDC status

Hannah Bossi (Massachusetts Inst. of Technology (US))

30/09/2025, 16:30

30. Performance of AFP/ToF detector in Run 3

Karel Cerny (Palacky University (CZ))

30/09/2025, 17:00

26. Discussion

30/09/2025, 17:30

18. ATLAS–TOTEM tension and low-mass diffraction

Rafał Staszewski (IFJ PAN Cracow (PL))

01/10/2025, 10:00

3. CMS-PPS Operation with Rotated Roman Pots

Mario Deile (CERN)

01/10/2025, 10:30

The Roman Pot detector geometry of the CMS Precision Proton Spectrometer, PPS, was designed to cover the leading proton hit distribution for horizontal beam crossing in the CMS interaction point, IP5. This default beam crossing scheme was used throughout Runs 1 - 3 until 2024. In 2025, however, the beam crossing plane in IP5 was changed to vertical, which led to a vertically shifted and wider...

19. Hard diffraction and photon exchanges at the LHC

Christophe Royon (The University of Kansas (US))

01/10/2025, 11:30

25. Hadron Collider Measurements for IACT Background Modeling

Clara Elisabeth Leitgeb (Humboldt University of Berlin (DE))

01/10/2025, 12:00

31. Discussion

01/10/2025, 12:30

32. PREFACE Update

Suat Ozkorucuklu (Bogazici Univ/ Suleyman Demirel Univ.), Suat Ozkorucuklu (Istanbul University (TR))

01/10/2025, 14:30

2. Space and time structure of luminosity at a collider with crab cavities

Dr Joachim Baechler (CERN)

01/10/2025, 15:00

The impact of the crab cavity on the space and time structure of luminosity will be presented. For a given set of collider operational parameters the single bunch crossing luminosity and the vertex space-time distributions are computed, based on the ILUMI4d algorithm.

33. Rapidity Gaps with FSC: Legacy and Prospects

Aldo Penzo (University of Iowa (US))

01/10/2025, 16:00

34. Hadron Forward Calorimeters: Timing optimization and consequences

Caglar Zorbilmez (Istanbul University (TR)), Ilknur Hos (Istanbul University - Cerrahpasa (TR))

01/10/2025, 16:30

35. Neutrinos in PREFACE

Michael Albrow (Fermi National Accelerator Lab. (US)), Michael Albrow, Mike Albrow (Fermi National Accelerator Laboratory)

01/10/2025, 17:00

36. Discussion

01/10/2025, 17:30

37. Workshop conclusion

Agustin Sabio Vera (CERN), Agustin Sabio Vera, Prof. Agustin Sabio Vera, Christophe Royon (The University of Kansas (US)), Jesse Liu (New York University), Karel Cerny (Palacky University (CZ)), Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

01/10/2025, 18:00

38. Discussion: yellow report, long term projects

02/10/2025, 10:00

8. Investigating the energy dependence of exclusive heavy vector meson photoproduction cross-sections using NLO BFKL evolution

Martin Hentschinski (Universidad de las Americas, Puebla)

We study the energy dependence of the cross-section for exclusive photoproduction of vector mesons J/ψ and Υ, using a solution to the next-to-leading order (NLO) Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation. Our goal is to use BFKL evolution as a benchmark to provide evidence for the presence of non-linear QCD dynamics and signs for the onset of gluon saturation at highest center of mass...

7. qT/Q correction for unpolarized Drell-Yan in TMD factorization

Arturo Arroyo Castro (UCM)

The transverse momentum dependent (TMD) factorization theorem incorporates several types of power corrections to the leading term. For large values of transverse momentum, $q_T/Q$ corrections become significant. They arise from higher-twist TMD distribtuions, which are singular at small transverse distances. We propose a method that reveals this singularity and makes the $q_T/Q$ correction...