P. Caucal

Scheme Transformations in Non-Linear QCD Evolution: Towards a Stable NLO BK Equation

Renaud Boussarie, Paul Caucal, Piotr Korcyl +1

High-energy QCD evolution at NLO suffers from large collinear logarithms that make the perturbative expansion of the Balitsky-Kovchegov (BK) equation unstable. We develop a systema…

Quark fracture function at small $x$ from the Color Glass Condensate

Paul Caucal, Nolann Juet, Farid Salazar

The target-fragmentation region in deeply inelastic electron-nucleus scattering provides insight into the partonic structure of the target, as hadrons measured in the final state r…

Color Coherence and the Soft Structure of QCD Jets in Vacuum and the QGP

Paul Caucal, Yacine Mehtar-Tani

We formulate a theoretical framework for the evolution of QCD jets in vacuum and in the quark--gluon plasma through the resummation of large energy logarithms. Exploiting the stron…

Jet Quenching Meets Gluon Saturation

Paul Caucal, Kevin Eisenberg, Yacine Mehtar-Tani

We present a theoretical framework for jet fragmentation in heavy-ion collisions based on the resummation of large energy logarithms. Exploiting the hierarchy of scales characteris…

Open quantum system approach to the transverse momentum broadening of a colour dipole

François Arleo, Pietro Benzoni, Paul Caucal +1

Using the open quantum systems formalism, we study the propagation of a quark-antiquark pair propagating through a dense QCD plasma of size $L$ and transverse momentum broadening t…

TMD factorization in diffractive heavy-quark production in photon-nucleus collisions

Paul Caucal, Patricia Gimeno-Estivill, Edmond Iancu +2

Using the Colour Glass Condensate effective theory, we study the diffractive production of a massive quark-antiquark pair accompanied by a gluon in coherent photon-nucleus collisio…

Forward trijet production in proton-nucleus collisions: gluon initiated channel

Paul Caucal, Marcos Guerrero Morales, Farid Salazar

In this paper, we present results for the forward three-parton production differential cross section in the gluon-initiated channel in proton-nucleus collisions. This result is the…

2025 EIC-France Workshop: Physics Highlights and Perspectives

F. Arleo, V. Bertone, J. Bettane +75

This document presents a synthesis of the theory contributions and discussions from the 2nd EIC-France Workshop, held at IJCLab (Orsay) on 1-3 December 2025. The workshop brought t…

Probing gluon saturation with forward di-hadron correlations in proton-nucleus collisions

Paul Caucal, Zhong-Bo Kang, Piotr Korcyl +5

We present a detailed numerical investigation of semi-inclusive forward di-hadron production in proton-nucleus collisions employing the Color Glass Condensate effective theory. We…

Rotating the Color Glass Condensate

Renaud Boussarie, Paul Caucal, Piotr Korcyl +1

High-energy QCD evolution beyond leading order suffers from instabilities driven by large collinear logarithms. We present a framework, consistent with the standard high-energy ope…

Gluon splitting at small $x$ : a unified derivation for the JIMWLK, DGLAP and CSS equations

Paul Caucal, Edmond Iancu, Farid Salazar +1

We revisit the calculation of the next-to-leading order (NLO) corrections to dijet production in electron-ion collisions at small $x$ . We focus on the back-to-back configuration wh…

Collinear Structure of Nonlinear Small- $x$ Evolution

Renaud Boussarie, Paul Caucal, Yacine Mehtar-Tani

We introduce a novel approach to high-energy QCD factorization of cross-sections for processes involving a dilute projectile and a dense target. Our method preserves the factorizat…

Unveiling the sea: universality of the transverse momentum dependent quark distributions at small $x$

Paul Caucal, Marcos Guerrero Morales, Edmond Iancu +2

Within the Colour Glass Condensate effective theory, we demonstrate that back-to-back dijet correlations in dilute-dense collisions involving a small- $x$ quark from the nuclear tar…

Prospective report of the French QCD community to the ESPPU 2025 with respect to the program of the LHC Run 5 and beyond and future colliders at CERN

Carolina Arata, François Arleo, Benjamin Audurier +59

This document summarizes the prospective physics plans of the French QCD and Heavy-Ion community, including the experimental programs at the LHC Run 5 and beyond and future collide…

Evolution of the transverse-momentum dependent gluon distribution at small $x$

Paul Caucal, Edmond Iancu

Using the colour dipole picture for photon-nucleus interactions at small $x$ together with the Color Glass Condensate (CGC) effective theory, we demonstrate that the next-to-leadin…

Dihadron correlations in small- $x$ DIS at NLO: transverse momentum dependent fragmentation

Paul Caucal, Farid Salazar

We compute inclusive dihadron cross-section in Deep Inelastic Scattering at next-to-leading order (NLO) and small $x$ in the Color Glass Condensate. We focus on the kinematic limit…