Advances in QCD at the LHC and the EIC

Session

Soft QCD and Diffraction

13 Nov 2025, 09:00

CBPF, Rio de Janeiro

22. Soft and semi-hard components of multiplicity distributions in the k_T factorization approach

Henrique Rodrigues Martins Fontes (Instituto de Física da USP)

13/11/2025, 09:00

18+2'
The multiplicity distribution (MD) of charged particles in high-energy proton-proton collisions remains an intricate aspect of quantum chromodynamics (QCD). Traditional models, such as the Negative Binomial Distribution (NBD), successfully described MDs at lower energies, but fail at higher energies, such as those probed by the Large Hadron Collider (LHC), where a "shoulder-like"...

38. Particle production in semi/exclusive collisions and collectivity probes at the LHC

Dr Javier Alberto Murillo Quijada (Universidad de Sonora (MX))

13/11/2025, 09:20

23+2'
After confirmation of production of exclusive events with intact protons and ions at the LHC such as light by light scattering or dilepton exclusive production, there is increased interest to probe for photo or pomeron induced production of mesons and di-quark pair systems such as top antitop pairs. The talk describes key signatures for ttbar production with a single intact proton via...

36. Diffractive processes in pPb collisions and intrajet collectivity probes at the LHC

Jesus Alberto Velazquez Corral (The University of Kansas (US))

13/11/2025, 09:45

18+2'
Diffractive processes in proton–lead (pPb) collisions provide a window into the nonperturbative regime of QCD, where color singlet exchanges and gluon saturation phenomena may play a key role. Recent observations of collective-like effects within jets suggest that signatures of collectivity, traditionally associated with heavy-ion collisions, may also emerge in small systems. In this...

62. TOTEM results

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

13/11/2025, 10:40

27+3'

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

Janusz Chwastowski (Polish Academy of Sciences (PL))

13/11/2025, 11:10

27+3'
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...

10. The ATLAS Forward Proton Time-of-Flight Detector System

Mr Daniel Ernani Martins Neto (Polish Academy of Sciences (PL))

13/11/2025, 11:40

18+2'
The Time-of-Flight (ToF) detectors in the ATLAS Forward Proton (AFP) system are designed to determine the primary vertex z-position of the pp -> pXp processes by comparing the arrival times measured in the ToF for the two intact protons in the final state. We present performance studies in terms of efficiencies and timing resolutions using high-statistics, low, and moderate pile-up data...

2. Monte Carlo Simulation for the LHC Experiments at CERN: A Comprehensive Overview

Marija Rapseviciute (Vilnius University (LT))

This overview of the Monte Carlo (MC) simulation process at the four main experiments - ATLAS, CMS, ALICE, and LHCb - at the Large Hadron Collider (LHC) is provided in this talk. Given the complexity and noise of proton-proton collisions, simulated samples are essential for understanding and interpreting the experimental results, enabling precise measurements and searches for new physics. The...

61. Review of diffractive results at the LHC

Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR))

23+2'